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Author SHA1 Message Date
Linus Torvalds
dd161f74f8 tracing and sorttable updates for 6.15: 
- Implement arm64 build time sorting of the mcount location table
 
   When gcc is used to build arm64, the mcount_loc section is all zeros in
   the vmlinux elf file. The addresses are stored in the Elf_Rela location.
   To sort at build time, an array is allocated and the addresses are added
   to it via the content of the mcount_loc section as well as he Elf_Rela
   data. After sorting, the information is put back into the Elf_Rela which
   now has the section sorted.
 
 - Make sorting of mcount location table for arm64 work with clang as well
 
   When clang is used, the mcount_loc section contains the addresses, unlike
   the gcc build. An array is still created and the sorting works for both
   methods.
 
 - Remove weak functions from the mcount_loc section
 
   Have the sorttable code pass in the data of functions defined via nm -S
   which shows the functions as well as their sizes. Using this information
   the sorttable code can determine if a function in the mcount_loc section
   was weak and overridden. If the function is not found, it is set to be
   zero. On boot, when the mcount_loc section is read and the ftrace table is
   created, if the address in the mcount_loc is not in the kernel core text
   then it is removed and not added to the ftrace_filter_functions (the
   functions that can be attached by ftrace callbacks).
 
 - Update and fix the reporting of how much data is used for ftrace functions
 
   On boot, a report of how many pages were used by the ftrace table as well
   as how they were grouped (the table holds a list of sections that are
   groups of pages that were able to be allocated). The removing of the weak
   functions required the accounting to be updated.
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Merge tag 'trace-sorttable-v6.15' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace

Pull tracing / sorttable updates from Steven Rostedt:

 - Implement arm64 build time sorting of the mcount location table

   When gcc is used to build arm64, the mcount_loc section is all zeros
   in the vmlinux elf file. The addresses are stored in the Elf_Rela
   location.

   To sort at build time, an array is allocated and the addresses are
   added to it via the content of the mcount_loc section as well as he
   Elf_Rela data. After sorting, the information is put back into the
   Elf_Rela which now has the section sorted.

 - Make sorting of mcount location table for arm64 work with clang as
   well

   When clang is used, the mcount_loc section contains the addresses,
   unlike the gcc build. An array is still created and the sorting works
   for both methods.

 - Remove weak functions from the mcount_loc section

   Have the sorttable code pass in the data of functions defined via
   'nm -S' which shows the functions as well as their sizes. Using this
   information the sorttable code can determine if a function in the
   mcount_loc section was weak and overridden. If the function is not
   found, it is set to be zero. On boot, when the mcount_loc section is
   read and the ftrace table is created, if the address in the
   mcount_loc is not in the kernel core text then it is removed and not
   added to the ftrace_filter_functions (the functions that can be
   attached by ftrace callbacks).

 - Update and fix the reporting of how much data is used for ftrace
   functions

   On boot, a report of how many pages were used by the ftrace table as
   well as how they were grouped (the table holds a list of sections
   that are groups of pages that were able to be allocated). The
   removing of the weak functions required the accounting to be updated.

* tag 'trace-sorttable-v6.15' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
  scripts/sorttable: Allow matches to functions before function entry
  scripts/sorttable: Use normal sort if theres no relocs in the mcount section
  ftrace: Check against is_kernel_text() instead of kaslr_offset()
  ftrace: Test mcount_loc addr before calling ftrace_call_addr()
  ftrace: Have ftrace pages output reflect freed pages
  ftrace: Update the mcount_loc check of skipped entries
  scripts/sorttable: Zero out weak functions in mcount_loc table
  scripts/sorttable: Always use an array for the mcount_loc sorting
  scripts/sorttable: Have mcount rela sort use direct values
  arm64: scripts/sorttable: Implement sorting mcount_loc at boot for arm64
 2025-03-27 15:44:34 -07:00
J. Neuschäfer
314655d41e scripts/make_fit: Print DT name before libfdt errors 
This makes it easier to pinpoint where the error happened. For example:

  FIT     arch/powerpc/boot/image.fit
Error processing arch/powerpc/boot/dts/microwatt.dtb:
Traceback (most recent call last):
  File "/home/jn/dev/linux/linux-git/build-mpc83xx/../scripts/make_fit.py", line 335, in <module>
    sys.exit(run_make_fit())
             ^^^^^^^^^^^^^^
  File "/home/jn/dev/linux/linux-git/build-mpc83xx/../scripts/make_fit.py", line 309, in run_make_fit
    out_data, count, size = build_fit(args)
                            ^^^^^^^^^^^^^^^
  File "/home/jn/dev/linux/linux-git/build-mpc83xx/../scripts/make_fit.py", line 286, in build_fit
    raise e
  File "/home/jn/dev/linux/linux-git/build-mpc83xx/../scripts/make_fit.py", line 283, in build_fit
    (model, compat, files) = process_dtb(fname, args)
                             ^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/jn/dev/linux/linux-git/build-mpc83xx/../scripts/make_fit.py", line 231, in process_dtb
    model = fdt.getprop(0, 'model').as_str()
            ^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/libfdt.py", line 448, in getprop
    pdata = check_err_null(fdt_getprop(self._fdt, nodeoffset, prop_name),
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/libfdt.py", line 153, in check_err_null
    raise FdtException(val)
libfdt.FdtException: pylibfdt error -1: FDT_ERR_NOTFOUND

Signed-off-by: J. Neuschäfer <j.ne@posteo.net>
Link: https://lore.kernel.org/r/20250209-makefit-v1-1-bfe6151e8f0a@posteo.net
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
 2025-03-27 14:03:32 -05:00
Linus Torvalds
1a9239bb42 Networking changes for 6.15. 
Core & protocols
 ----------------
 
  - Continue Netlink conversions to per-namespace RTNL lock
    (IPv4 routing, routing rules, routing next hops, ARP ioctls).
 
  - Continue extending the use of netdev instance locks. As a driver
    opt-in protect queue operations and (in due course) ethtool
    operations with the instance lock and not RTNL lock.
 
  - Support collecting TCP timestamps (data submitted, sent, acked)
    in BPF, allowing for transparent (to the application) and lower
    overhead tracking of TCP RPC performance.
 
  - Tweak existing networking Rx zero-copy infra to support zero-copy
    Rx via io_uring.
 
  - Optimize MPTCP performance in single subflow mode by 29%.
 
  - Enable GRO on packets which went thru XDP CPU redirect (were queued
    for processing on a different CPU). Improving TCP stream performance
    up to 2x.
 
  - Improve performance of contended connect() by 200% by searching
    for an available 4-tuple under RCU rather than a spin lock.
    Bring an additional 229% improvement by tweaking hash distribution.
 
  - Avoid unconditionally touching sk_tsflags on RX, improving
    performance under UDP flood by as much as 10%.
 
  - Avoid skb_clone() dance in ping_rcv() to improve performance under
    ping flood.
 
  - Avoid FIB lookup in netfilter if socket is available, 20% perf win.
 
  - Rework network device creation (in-kernel) API to more clearly
    identify network namespaces and their roles.
    There are up to 4 namespace roles but we used to have just 2 netns
    pointer arguments, interpreted differently based on context.
 
  - Use sysfs_break_active_protection() instead of trylock to avoid
    deadlocks between unregistering objects and sysfs access.
 
  - Add a new sysctl and sockopt for capping max retransmit timeout
    in TCP.
 
  - Support masking port and DSCP in routing rule matches.
 
  - Support dumping IPv4 multicast addresses with RTM_GETMULTICAST.
 
  - Support specifying at what time packet should be sent on AF_XDP
    sockets.
 
  - Expose TCP ULP diagnostic info (for TLS and MPTCP) to non-admin users.
 
  - Add Netlink YAML spec for WiFi (nl80211) and conntrack.
 
  - Introduce EXPORT_IPV6_MOD() and EXPORT_IPV6_MOD_GPL() for symbols
    which only need to be exported when IPv6 support is built as a module.
 
  - Age FDB entries based on Rx not Tx traffic in VxLAN, similar
    to normal bridging.
 
  - Allow users to specify source port range for GENEVE tunnels.
 
  - netconsole: allow attaching kernel release, CPU ID and task name
    to messages as metadata
 
 Driver API
 ----------
 
  - Continue rework / fixing of Energy Efficient Ethernet (EEE) across
    the SW layers. Delegate the responsibilities to phylink where possible.
    Improve its handling in phylib.
 
  - Support symmetric OR-XOR RSS hashing algorithm.
 
  - Support tracking and preserving IRQ affinity by NAPI itself.
 
  - Support loopback mode speed selection for interface selftests.
 
 Device drivers
 --------------
 
  - Remove the IBM LCS driver for s390.
 
  - Remove the sb1000 cable modem driver.
 
  - Add support for SFP module access over SMBus.
 
  - Add MCTP transport driver for MCTP-over-USB.
 
  - Enable XDP metadata support in multiple drivers.
 
  - Ethernet high-speed NICs:
    - Broadcom (bnxt):
      - add PCIe TLP Processing Hints (TPH) support for new AMD platforms
      - support dumping RoCE queue state for debug
      - opt into instance locking
    - Intel (100G, ice, idpf):
      - ice: rework MSI-X IRQ management and distribution
      - ice: support for E830 devices
      - iavf: add support for Rx timestamping
      - iavf: opt into instance locking
    - nVidia/Mellanox:
      - mlx4: use page pool memory allocator for Rx
      - mlx5: support for one PTP device per hardware clock
      - mlx5: support for 200Gbps per-lane link modes
      - mlx5: move IPSec policy check after decryption
    - AMD/Solarflare:
      - support FW flashing via devlink
    - Cisco (enic):
      - use page pool memory allocator for Rx
      - enable 32, 64 byte CQEs
      - get max rx/tx ring size from the device
    - Meta (fbnic):
      - support flow steering and RSS configuration
      - report queue stats
      - support TCP segmentation
      - support IRQ coalescing
      - support ring size configuration
    - Marvell/Cavium:
      - support AF_XDP
    - Wangxun:
      - support for PTP clock and timestamping
    - Huawei (hibmcge):
      - checksum offload
      - add more statistics
 
  - Ethernet virtual:
    - VirtIO net:
      - aggressively suppress Tx completions, improve perf by 96% with
        1 CPU and 55% with 2 CPUs
      - expose NAPI to IRQ mapping and persist NAPI settings
    - Google (gve):
      - support XDP in DQO RDA Queue Format
      - opt into instance locking
    - Microsoft vNIC:
      - support BIG TCP
 
  - Ethernet NICs consumer, and embedded:
    - Synopsys (stmmac):
      - cleanup Tx and Tx clock setting and other link-focused cleanups
      - enable SGMII and 2500BASEX mode switching for Intel platforms
      - support Sophgo SG2044
    - Broadcom switches (b53):
      - support for BCM53101
    - TI:
      - iep: add perout configuration support
      - icssg: support XDP
    - Cadence (macb):
      - implement BQL
    - Xilinx (axinet):
      - support dynamic IRQ moderation and changing coalescing at runtime
      - implement BQL
      - report standard stats
    - MediaTek:
      - support phylink managed EEE
    - Intel:
      - igc: don't restart the interface on every XDP program change
    - RealTek (r8169):
      - support reading registers of internal PHYs directly
      - increase max jumbo packet size on RTL8125/RTL8126
    - Airoha:
      - support for RISC-V NPU packet processing unit
      - enable scatter-gather and support MTU up to 9kB
    - Tehuti (tn40xx):
      - support cards with TN4010 MAC and an Aquantia AQR105 PHY
 
  - Ethernet PHYs:
    - support for TJA1102S, TJA1121
    - dp83tg720: add randomized polling intervals for link detection
    - dp83822: support changing the transmit amplitude voltage
    - support for LEDs on 88q2xxx
 
  - CAN:
    - canxl: support Remote Request Substitution bit access
    - flexcan: add S32G2/S32G3 SoC
 
  - WiFi:
    - remove cooked monitor support
    - strict mode for better AP testing
    - basic EPCS support
    - OMI RX bandwidth reduction support
    - batman-adv: add support for jumbo frames
 
  - WiFi drivers:
    - RealTek (rtw88):
      - support RTL8814AE and RTL8814AU
    - RealTek (rtw89):
      - switch using wiphy_lock and wiphy_work
      - add BB context to manipulate two PHY as preparation of MLO
      - improve BT-coexistence mechanism to play A2DP smoothly
    - Intel (iwlwifi):
      - add new iwlmld sub-driver for latest HW/FW combinations
    - MediaTek (mt76):
      - preparation for mt7996 Multi-Link Operation (MLO) support
    - Qualcomm/Atheros (ath12k):
      - continued work on MLO
    - Silabs (wfx):
      - Wake-on-WLAN support
 
  - Bluetooth:
    - add support for skb TX SND/COMPLETION timestamping
    - hci_core: enable buffer flow control for SCO/eSCO
    - coredump: log devcd dumps into the monitor
 
  - Bluetooth drivers:
    - intel: add support to configure TX power
    - nxp: handle bootloader error during cmd5 and cmd7
 
 Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Merge tag 'net-next-6.15' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next

Pull networking updates from Jakub Kicinski:
 "Core & protocols:

   - Continue Netlink conversions to per-namespace RTNL lock
     (IPv4 routing, routing rules, routing next hops, ARP ioctls)

   - Continue extending the use of netdev instance locks. As a driver
     opt-in protect queue operations and (in due course) ethtool
     operations with the instance lock and not RTNL lock.

   - Support collecting TCP timestamps (data submitted, sent, acked) in
     BPF, allowing for transparent (to the application) and lower
     overhead tracking of TCP RPC performance.

   - Tweak existing networking Rx zero-copy infra to support zero-copy
     Rx via io_uring.

   - Optimize MPTCP performance in single subflow mode by 29%.

   - Enable GRO on packets which went thru XDP CPU redirect (were queued
     for processing on a different CPU). Improving TCP stream
     performance up to 2x.

   - Improve performance of contended connect() by 200% by searching for
     an available 4-tuple under RCU rather than a spin lock. Bring an
     additional 229% improvement by tweaking hash distribution.

   - Avoid unconditionally touching sk_tsflags on RX, improving
     performance under UDP flood by as much as 10%.

   - Avoid skb_clone() dance in ping_rcv() to improve performance under
     ping flood.

   - Avoid FIB lookup in netfilter if socket is available, 20% perf win.

   - Rework network device creation (in-kernel) API to more clearly
     identify network namespaces and their roles. There are up to 4
     namespace roles but we used to have just 2 netns pointer arguments,
     interpreted differently based on context.

   - Use sysfs_break_active_protection() instead of trylock to avoid
     deadlocks between unregistering objects and sysfs access.

   - Add a new sysctl and sockopt for capping max retransmit timeout in
     TCP.

   - Support masking port and DSCP in routing rule matches.

   - Support dumping IPv4 multicast addresses with RTM_GETMULTICAST.

   - Support specifying at what time packet should be sent on AF_XDP
     sockets.

   - Expose TCP ULP diagnostic info (for TLS and MPTCP) to non-admin
     users.

   - Add Netlink YAML spec for WiFi (nl80211) and conntrack.

   - Introduce EXPORT_IPV6_MOD() and EXPORT_IPV6_MOD_GPL() for symbols
     which only need to be exported when IPv6 support is built as a
     module.

   - Age FDB entries based on Rx not Tx traffic in VxLAN, similar to
     normal bridging.

   - Allow users to specify source port range for GENEVE tunnels.

   - netconsole: allow attaching kernel release, CPU ID and task name to
     messages as metadata

  Driver API:

   - Continue rework / fixing of Energy Efficient Ethernet (EEE) across
     the SW layers. Delegate the responsibilities to phylink where
     possible. Improve its handling in phylib.

   - Support symmetric OR-XOR RSS hashing algorithm.

   - Support tracking and preserving IRQ affinity by NAPI itself.

   - Support loopback mode speed selection for interface selftests.

  Device drivers:

   - Remove the IBM LCS driver for s390

   - Remove the sb1000 cable modem driver

   - Add support for SFP module access over SMBus

   - Add MCTP transport driver for MCTP-over-USB

   - Enable XDP metadata support in multiple drivers

   - Ethernet high-speed NICs:
      - Broadcom (bnxt):
         - add PCIe TLP Processing Hints (TPH) support for new AMD
           platforms
         - support dumping RoCE queue state for debug
         - opt into instance locking
      - Intel (100G, ice, idpf):
         - ice: rework MSI-X IRQ management and distribution
         - ice: support for E830 devices
         - iavf: add support for Rx timestamping
         - iavf: opt into instance locking
      - nVidia/Mellanox:
         - mlx4: use page pool memory allocator for Rx
         - mlx5: support for one PTP device per hardware clock
         - mlx5: support for 200Gbps per-lane link modes
         - mlx5: move IPSec policy check after decryption
      - AMD/Solarflare:
         - support FW flashing via devlink
      - Cisco (enic):
         - use page pool memory allocator for Rx
         - enable 32, 64 byte CQEs
         - get max rx/tx ring size from the device
      - Meta (fbnic):
         - support flow steering and RSS configuration
         - report queue stats
         - support TCP segmentation
         - support IRQ coalescing
         - support ring size configuration
      - Marvell/Cavium:
         - support AF_XDP
      - Wangxun:
         - support for PTP clock and timestamping
      - Huawei (hibmcge):
         - checksum offload
         - add more statistics

   - Ethernet virtual:
      - VirtIO net:
         - aggressively suppress Tx completions, improve perf by 96%
           with 1 CPU and 55% with 2 CPUs
         - expose NAPI to IRQ mapping and persist NAPI settings
      - Google (gve):
         - support XDP in DQO RDA Queue Format
         - opt into instance locking
      - Microsoft vNIC:
         - support BIG TCP

   - Ethernet NICs consumer, and embedded:
      - Synopsys (stmmac):
         - cleanup Tx and Tx clock setting and other link-focused
           cleanups
         - enable SGMII and 2500BASEX mode switching for Intel platforms
         - support Sophgo SG2044
      - Broadcom switches (b53):
         - support for BCM53101
      - TI:
         - iep: add perout configuration support
         - icssg: support XDP
      - Cadence (macb):
         - implement BQL
      - Xilinx (axinet):
         - support dynamic IRQ moderation and changing coalescing at
           runtime
         - implement BQL
         - report standard stats
      - MediaTek:
         - support phylink managed EEE
      - Intel:
         - igc: don't restart the interface on every XDP program change
      - RealTek (r8169):
         - support reading registers of internal PHYs directly
         - increase max jumbo packet size on RTL8125/RTL8126
      - Airoha:
         - support for RISC-V NPU packet processing unit
         - enable scatter-gather and support MTU up to 9kB
      - Tehuti (tn40xx):
         - support cards with TN4010 MAC and an Aquantia AQR105 PHY

   - Ethernet PHYs:
      - support for TJA1102S, TJA1121
      - dp83tg720: add randomized polling intervals for link detection
      - dp83822: support changing the transmit amplitude voltage
      - support for LEDs on 88q2xxx

   - CAN:
      - canxl: support Remote Request Substitution bit access
      - flexcan: add S32G2/S32G3 SoC

   - WiFi:
      - remove cooked monitor support
      - strict mode for better AP testing
      - basic EPCS support
      - OMI RX bandwidth reduction support
      - batman-adv: add support for jumbo frames

   - WiFi drivers:
      - RealTek (rtw88):
         - support RTL8814AE and RTL8814AU
      - RealTek (rtw89):
         - switch using wiphy_lock and wiphy_work
         - add BB context to manipulate two PHY as preparation of MLO
         - improve BT-coexistence mechanism to play A2DP smoothly
      - Intel (iwlwifi):
         - add new iwlmld sub-driver for latest HW/FW combinations
      - MediaTek (mt76):
         - preparation for mt7996 Multi-Link Operation (MLO) support
      - Qualcomm/Atheros (ath12k):
         - continued work on MLO
      - Silabs (wfx):
         - Wake-on-WLAN support

   - Bluetooth:
      - add support for skb TX SND/COMPLETION timestamping
      - hci_core: enable buffer flow control for SCO/eSCO
      - coredump: log devcd dumps into the monitor

   - Bluetooth drivers:
      - intel: add support to configure TX power
      - nxp: handle bootloader error during cmd5 and cmd7"

* tag 'net-next-6.15' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1681 commits)
  unix: fix up for "apparmor: add fine grained af_unix mediation"
  mctp: Fix incorrect tx flow invalidation condition in mctp-i2c
  net: usb: asix: ax88772: Increase phy_name size
  net: phy: Introduce PHY_ID_SIZE — minimum size for PHY ID string
  net: libwx: fix Tx L4 checksum
  net: libwx: fix Tx descriptor content for some tunnel packets
  atm: Fix NULL pointer dereference
  net: tn40xx: add pci-id of the aqr105-based Tehuti TN4010 cards
  net: tn40xx: prepare tn40xx driver to find phy of the TN9510 card
  net: tn40xx: create swnode for mdio and aqr105 phy and add to mdiobus
  net: phy: aquantia: add essential functions to aqr105 driver
  net: phy: aquantia: search for firmware-name in fwnode
  net: phy: aquantia: add probe function to aqr105 for firmware loading
  net: phy: Add swnode support to mdiobus_scan
  gve: add XDP DROP and PASS support for DQ
  gve: update XDP allocation path support RX buffer posting
  gve: merge packet buffer size fields
  gve: update GQ RX to use buf_size
  gve: introduce config-based allocation for XDP
  gve: remove xdp_xsk_done and xdp_xsk_wakeup statistics
  ...
 2025-03-26 21:48:21 -07:00
Christian Schrrefl
ccb8ce5268 ARM: 9441/1: rust: Enable Rust support for ARMv7 
This commit allows building ARMv7 kernels with Rust support.

The rust core library expects some __eabi_... functions
that are not implemented in the kernel.
Those functions are some float operations and __aeabi_uldivmod.
For now those are implemented with define_panicking_intrinsics!.

This is based on the code by Sven Van Asbroeck from the original
rust branch and inspired by the AArch version by Jamie Cunliffe.

I have tested the rust samples and a custom simple MMIO module
on hardware (De1SoC FPGA + Arm A9 CPU).

Tested-by: Rudraksha Gupta <guptarud@gmail.com>
Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Acked-by: Miguel Ojeda <ojeda@kernel.org>
Tested-by: Miguel Ojeda <ojeda@kernel.org>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Christian Schrefl <chrisi.schrefl@gmail.com>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
 2025-03-26 13:31:16 +00:00
Linus Torvalds
ee6740fd34 CRC updates for 6.15 
Another set of improvements to the kernel's CRC (cyclic redundancy
 check) code:
 
 - Rework the CRC64 library functions to be directly optimized, like what
   I did last cycle for the CRC32 and CRC-T10DIF library functions.
 
 - Rewrite the x86 PCLMULQDQ-optimized CRC code, and add VPCLMULQDQ
   support and acceleration for crc64_be and crc64_nvme.
 
 - Rewrite the riscv Zbc-optimized CRC code, and add acceleration for
   crc_t10dif, crc64_be, and crc64_nvme.
 
 - Remove crc_t10dif and crc64_rocksoft from the crypto API, since they
   are no longer needed there.
 
 - Rename crc64_rocksoft to crc64_nvme, as the old name was incorrect.
 
 - Add kunit test cases for crc64_nvme and crc7.
 
 - Eliminate redundant functions for calculating the Castagnoli CRC32,
   settling on just crc32c().
 
 - Remove unnecessary prompts from some of the CRC kconfig options.
 
 - Further optimize the x86 crc32c code.
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Merge tag 'crc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiggers/linux

Pull CRC updates from Eric Biggers:
 "Another set of improvements to the kernel's CRC (cyclic redundancy
  check) code:

   - Rework the CRC64 library functions to be directly optimized, like
     what I did last cycle for the CRC32 and CRC-T10DIF library
     functions

   - Rewrite the x86 PCLMULQDQ-optimized CRC code, and add VPCLMULQDQ
     support and acceleration for crc64_be and crc64_nvme

   - Rewrite the riscv Zbc-optimized CRC code, and add acceleration for
     crc_t10dif, crc64_be, and crc64_nvme

   - Remove crc_t10dif and crc64_rocksoft from the crypto API, since
     they are no longer needed there

   - Rename crc64_rocksoft to crc64_nvme, as the old name was incorrect

   - Add kunit test cases for crc64_nvme and crc7

   - Eliminate redundant functions for calculating the Castagnoli CRC32,
     settling on just crc32c()

   - Remove unnecessary prompts from some of the CRC kconfig options

   - Further optimize the x86 crc32c code"

* tag 'crc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiggers/linux: (36 commits)
  x86/crc: drop the avx10_256 functions and rename avx10_512 to avx512
  lib/crc: remove unnecessary prompt for CONFIG_CRC64
  lib/crc: remove unnecessary prompt for CONFIG_LIBCRC32C
  lib/crc: remove unnecessary prompt for CONFIG_CRC8
  lib/crc: remove unnecessary prompt for CONFIG_CRC7
  lib/crc: remove unnecessary prompt for CONFIG_CRC4
  lib/crc7: unexport crc7_be_syndrome_table
  lib/crc_kunit.c: update comment in crc_benchmark()
  lib/crc_kunit.c: add test and benchmark for crc7_be()
  x86/crc32: optimize tail handling for crc32c short inputs
  riscv/crc64: add Zbc optimized CRC64 functions
  riscv/crc-t10dif: add Zbc optimized CRC-T10DIF function
  riscv/crc32: reimplement the CRC32 functions using new template
  riscv/crc: add "template" for Zbc optimized CRC functions
  x86/crc: add ANNOTATE_NOENDBR to suppress objtool warnings
  x86/crc32: improve crc32c_arch() code generation with clang
  x86/crc64: implement crc64_be and crc64_nvme using new template
  x86/crc-t10dif: implement crc_t10dif using new template
  x86/crc32: implement crc32_le using new template
  x86/crc: add "template" for [V]PCLMULQDQ based CRC functions
  ...
 2025-03-25 18:33:04 -07:00
Linus Torvalds
59c017ce9e selinux/stable-6.15 PR 20250323 
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Merge tag 'selinux-pr-20250323' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux

Pull selinux updates from Paul Moore:

 - Add additional SELinux access controls for kernel file reads/loads

   The SELinux kernel file read/load access controls were never updated
   beyond the initial kernel module support, this pull request adds
   support for firmware, kexec, policies, and x.509 certificates.

 - Add support for wildcards in network interface names

   There are a number of userspace tools which auto-generate network
   interface names using some pattern of <XXXX>-<NN> where <XXXX> is a
   fixed string, e.g. "podman", and <NN> is a increasing counter.
   Supporting wildcards in the SELinux policy for network interfaces
   simplifies the policy associted with these interfaces.

 - Fix a potential problem in the kernel read file SELinux code

   SELinux should always check the file label in the
   security_kernel_read_file() LSM hook, regardless of if the file is
   being read in chunks. Unfortunately, the existing code only
   considered the file label on the first chunk; this pull request fixes
   this problem.

   There is more detail in the individual commit, but thankfully the
   existing code didn't expose a bug due to multi-stage reads only
   taking place in one driver, and that driver loading a file type that
   isn't targeted by the SELinux policy.

 - Fix the subshell error handling in the example policy loader

   Minor fix to SELinux example policy loader in scripts/selinux due to
   an undesired interaction with subshells and errexit.

* tag 'selinux-pr-20250323' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux:
  selinux: get netif_wildcard policycap from policy instead of cache
  selinux: support wildcard network interface names
  selinux: Chain up tool resolving errors in install_policy.sh
  selinux: add permission checks for loading other kinds of kernel files
  selinux: always check the file label in selinux_kernel_read_file()
  selinux: fix spelling error
 2025-03-25 15:52:32 -07:00
Josh Poimboeuf
876a4bce38 objtool: Remove --no-unreachable for noinstr-only vmlinux.o runs 
For (!X86_KERNEL_IBT && !LTO_CLANG && NOINSTR_VALIDATION), objtool runs
on both translation units and vmlinux.o.  The vmlinux.o run only does
noinstr/noret validation.  In that case --no-unreachable has no effect.
Remove it.

Note that for ((X86_KERNEL_IBT || LTO_CLANG) && KCOV), --no-unreachable
still gets set in objtool-args-y by scripts/Makefile.lib.

Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: https://lore.kernel.org/r/05414246a0124db2f21b0d071b652aa9043d039d.1742852847.git.jpoimboe@kernel.org
 2025-03-25 09:20:27 +01:00
Josh Poimboeuf
d39f82a058 objtool: Reduce CONFIG_OBJTOOL_WERROR verbosity 
Remove the following from CONFIG_OBJTOOL_WERROR:

  * backtrace

  * "upgraded warnings to errors" message

  * cmdline args

This makes the default output less cluttered and makes it easier to spot
the actual warnings.  Note the above options are still are available
with --verbose or OBJTOOL_VERBOSE=1.

Also, do the cmdline arg printing on all warnings, regardless of werror.

Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: https://lore.kernel.org/r/d61df69f64b396fa6b2a1335588aad7a34ea9e71.1742852846.git.jpoimboe@kernel.org
 2025-03-25 09:20:27 +01:00
Josh Poimboeuf
4759670bc3 objtool: Fix CONFIG_OBJTOOL_WERROR for vmlinux.o 
With (!X86_KERNEL_IBT && !LTO_CLANG && NOINSTR_VALIDATION), objtool runs
on both translation units and vmlinux.o.  With CONFIG_OBJTOOL_WERROR,
the TUs get --Werror but vmlinux.o doesn't.  Fix that.

Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: https://lore.kernel.org/r/4f71ab9b947ffc47b6a87dd3b9aff4bb32b36d0a.1742852846.git.jpoimboe@kernel.org
 2025-03-25 09:20:26 +01:00
Linus Torvalds
e34c38057a [ Merge note: this pull request depends on you having merged 
two locking commits in the locking tree,
 	      part of the locking-core-2025-03-22 pull request. ]
 
 x86 CPU features support:
   - Generate the <asm/cpufeaturemasks.h> header based on build config
     (H. Peter Anvin, Xin Li)
   - x86 CPUID parsing updates and fixes (Ahmed S. Darwish)
   - Introduce the 'setcpuid=' boot parameter (Brendan Jackman)
   - Enable modifying CPU bug flags with '{clear,set}puid='
     (Brendan Jackman)
   - Utilize CPU-type for CPU matching (Pawan Gupta)
   - Warn about unmet CPU feature dependencies (Sohil Mehta)
   - Prepare for new Intel Family numbers (Sohil Mehta)
 
 Percpu code:
   - Standardize & reorganize the x86 percpu layout and
     related cleanups (Brian Gerst)
   - Convert the stackprotector canary to a regular percpu
     variable (Brian Gerst)
   - Add a percpu subsection for cache hot data (Brian Gerst)
   - Unify __pcpu_op{1,2}_N() macros to __pcpu_op_N() (Uros Bizjak)
   - Construct __percpu_seg_override from __percpu_seg (Uros Bizjak)
 
 MM:
   - Add support for broadcast TLB invalidation using AMD's INVLPGB instruction
     (Rik van Riel)
   - Rework ROX cache to avoid writable copy (Mike Rapoport)
   - PAT: restore large ROX pages after fragmentation
     (Kirill A. Shutemov, Mike Rapoport)
   - Make memremap(MEMREMAP_WB) map memory as encrypted by default
     (Kirill A. Shutemov)
   - Robustify page table initialization (Kirill A. Shutemov)
   - Fix flush_tlb_range() when used for zapping normal PMDs (Jann Horn)
   - Clear _PAGE_DIRTY for kernel mappings when we clear _PAGE_RW
     (Matthew Wilcox)
 
 KASLR:
   - x86/kaslr: Reduce KASLR entropy on most x86 systems,
     to support PCI BAR space beyond the 10TiB region
     (CONFIG_PCI_P2PDMA=y) (Balbir Singh)
 
 CPU bugs:
   - Implement FineIBT-BHI mitigation (Peter Zijlstra)
   - speculation: Simplify and make CALL_NOSPEC consistent (Pawan Gupta)
   - speculation: Add a conditional CS prefix to CALL_NOSPEC (Pawan Gupta)
   - RFDS: Exclude P-only parts from the RFDS affected list (Pawan Gupta)
 
 System calls:
   - Break up entry/common.c (Brian Gerst)
   - Move sysctls into arch/x86 (Joel Granados)
 
 Intel LAM support updates: (Maciej Wieczor-Retman)
   - selftests/lam: Move cpu_has_la57() to use cpuinfo flag
   - selftests/lam: Skip test if LAM is disabled
   - selftests/lam: Test get_user() LAM pointer handling
 
 AMD SMN access updates:
   - Add SMN offsets to exclusive region access (Mario Limonciello)
   - Add support for debugfs access to SMN registers (Mario Limonciello)
   - Have HSMP use SMN through AMD_NODE (Yazen Ghannam)
 
 Power management updates: (Patryk Wlazlyn)
   - Allow calling mwait_play_dead with an arbitrary hint
   - ACPI/processor_idle: Add FFH state handling
   - intel_idle: Provide the default enter_dead() handler
   - Eliminate mwait_play_dead_cpuid_hint()
 
 Bootup:
 
 Build system:
   - Raise the minimum GCC version to 8.1 (Brian Gerst)
   - Raise the minimum LLVM version to 15.0.0
     (Nathan Chancellor)
 
 Kconfig: (Arnd Bergmann)
   - Add cmpxchg8b support back to Geode CPUs
   - Drop 32-bit "bigsmp" machine support
   - Rework CONFIG_GENERIC_CPU compiler flags
   - Drop configuration options for early 64-bit CPUs
   - Remove CONFIG_HIGHMEM64G support
   - Drop CONFIG_SWIOTLB for PAE
   - Drop support for CONFIG_HIGHPTE
   - Document CONFIG_X86_INTEL_MID as 64-bit-only
   - Remove old STA2x11 support
   - Only allow CONFIG_EISA for 32-bit
 
 Headers:
   - Replace __ASSEMBLY__ with __ASSEMBLER__ in UAPI and non-UAPI headers
     (Thomas Huth)
 
 Assembly code & machine code patching:
   - x86/alternatives: Simplify alternative_call() interface (Josh Poimboeuf)
   - x86/alternatives: Simplify callthunk patching (Peter Zijlstra)
   - KVM: VMX: Use named operands in inline asm (Josh Poimboeuf)
   - x86/hyperv: Use named operands in inline asm (Josh Poimboeuf)
   - x86/traps: Cleanup and robustify decode_bug() (Peter Zijlstra)
   - x86/kexec: Merge x86_32 and x86_64 code using macros from <asm/asm.h>
     (Uros Bizjak)
   - Use named operands in inline asm (Uros Bizjak)
   - Improve performance by using asm_inline() for atomic locking instructions
     (Uros Bizjak)
 
 Earlyprintk:
   - Harden early_serial (Peter Zijlstra)
 
 NMI handler:
   - Add an emergency handler in nmi_desc & use it in nmi_shootdown_cpus()
     (Waiman Long)
 
 Miscellaneous fixes and cleanups:
 
   - by Ahmed S. Darwish, Andy Shevchenko, Ard Biesheuvel,
     Artem Bityutskiy, Borislav Petkov, Brendan Jackman, Brian Gerst,
     Dan Carpenter, Dr. David Alan Gilbert, H. Peter Anvin,
     Ingo Molnar, Josh Poimboeuf, Kevin Brodsky, Mike Rapoport,
     Lukas Bulwahn, Maciej Wieczor-Retman, Max Grobecker,
     Patryk Wlazlyn, Pawan Gupta, Peter Zijlstra,
     Philip Redkin, Qasim Ijaz, Rik van Riel, Thomas Gleixner,
     Thorsten Blum, Tom Lendacky, Tony Luck, Uros Bizjak,
     Vitaly Kuznetsov, Xin Li, liuye.
 
 Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'x86-core-2025-03-22' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull core x86 updates from Ingo Molnar:
 "x86 CPU features support:
   - Generate the <asm/cpufeaturemasks.h> header based on build config
     (H. Peter Anvin, Xin Li)
   - x86 CPUID parsing updates and fixes (Ahmed S. Darwish)
   - Introduce the 'setcpuid=' boot parameter (Brendan Jackman)
   - Enable modifying CPU bug flags with '{clear,set}puid=' (Brendan
     Jackman)
   - Utilize CPU-type for CPU matching (Pawan Gupta)
   - Warn about unmet CPU feature dependencies (Sohil Mehta)
   - Prepare for new Intel Family numbers (Sohil Mehta)

  Percpu code:
   - Standardize & reorganize the x86 percpu layout and related cleanups
     (Brian Gerst)
   - Convert the stackprotector canary to a regular percpu variable
     (Brian Gerst)
   - Add a percpu subsection for cache hot data (Brian Gerst)
   - Unify __pcpu_op{1,2}_N() macros to __pcpu_op_N() (Uros Bizjak)
   - Construct __percpu_seg_override from __percpu_seg (Uros Bizjak)

  MM:
   - Add support for broadcast TLB invalidation using AMD's INVLPGB
     instruction (Rik van Riel)
   - Rework ROX cache to avoid writable copy (Mike Rapoport)
   - PAT: restore large ROX pages after fragmentation (Kirill A.
     Shutemov, Mike Rapoport)
   - Make memremap(MEMREMAP_WB) map memory as encrypted by default
     (Kirill A. Shutemov)
   - Robustify page table initialization (Kirill A. Shutemov)
   - Fix flush_tlb_range() when used for zapping normal PMDs (Jann Horn)
   - Clear _PAGE_DIRTY for kernel mappings when we clear _PAGE_RW
     (Matthew Wilcox)

  KASLR:
   - x86/kaslr: Reduce KASLR entropy on most x86 systems, to support PCI
     BAR space beyond the 10TiB region (CONFIG_PCI_P2PDMA=y) (Balbir
     Singh)

  CPU bugs:
   - Implement FineIBT-BHI mitigation (Peter Zijlstra)
   - speculation: Simplify and make CALL_NOSPEC consistent (Pawan Gupta)
   - speculation: Add a conditional CS prefix to CALL_NOSPEC (Pawan
     Gupta)
   - RFDS: Exclude P-only parts from the RFDS affected list (Pawan
     Gupta)

  System calls:
   - Break up entry/common.c (Brian Gerst)
   - Move sysctls into arch/x86 (Joel Granados)

  Intel LAM support updates: (Maciej Wieczor-Retman)
   - selftests/lam: Move cpu_has_la57() to use cpuinfo flag
   - selftests/lam: Skip test if LAM is disabled
   - selftests/lam: Test get_user() LAM pointer handling

  AMD SMN access updates:
   - Add SMN offsets to exclusive region access (Mario Limonciello)
   - Add support for debugfs access to SMN registers (Mario Limonciello)
   - Have HSMP use SMN through AMD_NODE (Yazen Ghannam)

  Power management updates: (Patryk Wlazlyn)
   - Allow calling mwait_play_dead with an arbitrary hint
   - ACPI/processor_idle: Add FFH state handling
   - intel_idle: Provide the default enter_dead() handler
   - Eliminate mwait_play_dead_cpuid_hint()

  Build system:
   - Raise the minimum GCC version to 8.1 (Brian Gerst)
   - Raise the minimum LLVM version to 15.0.0 (Nathan Chancellor)

  Kconfig: (Arnd Bergmann)
   - Add cmpxchg8b support back to Geode CPUs
   - Drop 32-bit "bigsmp" machine support
   - Rework CONFIG_GENERIC_CPU compiler flags
   - Drop configuration options for early 64-bit CPUs
   - Remove CONFIG_HIGHMEM64G support
   - Drop CONFIG_SWIOTLB for PAE
   - Drop support for CONFIG_HIGHPTE
   - Document CONFIG_X86_INTEL_MID as 64-bit-only
   - Remove old STA2x11 support
   - Only allow CONFIG_EISA for 32-bit

  Headers:
   - Replace __ASSEMBLY__ with __ASSEMBLER__ in UAPI and non-UAPI
     headers (Thomas Huth)

  Assembly code & machine code patching:
   - x86/alternatives: Simplify alternative_call() interface (Josh
     Poimboeuf)
   - x86/alternatives: Simplify callthunk patching (Peter Zijlstra)
   - KVM: VMX: Use named operands in inline asm (Josh Poimboeuf)
   - x86/hyperv: Use named operands in inline asm (Josh Poimboeuf)
   - x86/traps: Cleanup and robustify decode_bug() (Peter Zijlstra)
   - x86/kexec: Merge x86_32 and x86_64 code using macros from
     <asm/asm.h> (Uros Bizjak)
   - Use named operands in inline asm (Uros Bizjak)
   - Improve performance by using asm_inline() for atomic locking
     instructions (Uros Bizjak)

  Earlyprintk:
   - Harden early_serial (Peter Zijlstra)

  NMI handler:
   - Add an emergency handler in nmi_desc & use it in
     nmi_shootdown_cpus() (Waiman Long)

  Miscellaneous fixes and cleanups:
   - by Ahmed S. Darwish, Andy Shevchenko, Ard Biesheuvel, Artem
     Bityutskiy, Borislav Petkov, Brendan Jackman, Brian Gerst, Dan
     Carpenter, Dr. David Alan Gilbert, H. Peter Anvin, Ingo Molnar,
     Josh Poimboeuf, Kevin Brodsky, Mike Rapoport, Lukas Bulwahn, Maciej
     Wieczor-Retman, Max Grobecker, Patryk Wlazlyn, Pawan Gupta, Peter
     Zijlstra, Philip Redkin, Qasim Ijaz, Rik van Riel, Thomas Gleixner,
     Thorsten Blum, Tom Lendacky, Tony Luck, Uros Bizjak, Vitaly
     Kuznetsov, Xin Li, liuye"

* tag 'x86-core-2025-03-22' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (211 commits)
  zstd: Increase DYNAMIC_BMI2 GCC version cutoff from 4.8 to 11.0 to work around compiler segfault
  x86/asm: Make asm export of __ref_stack_chk_guard unconditional
  x86/mm: Only do broadcast flush from reclaim if pages were unmapped
  perf/x86/intel, x86/cpu: Replace Pentium 4 model checks with VFM ones
  perf/x86/intel, x86/cpu: Simplify Intel PMU initialization
  x86/headers: Replace __ASSEMBLY__ with __ASSEMBLER__ in non-UAPI headers
  x86/headers: Replace __ASSEMBLY__ with __ASSEMBLER__ in UAPI headers
  x86/locking/atomic: Improve performance by using asm_inline() for atomic locking instructions
  x86/asm: Use asm_inline() instead of asm() in clwb()
  x86/asm: Use CLFLUSHOPT and CLWB mnemonics in <asm/special_insns.h>
  x86/hweight: Use asm_inline() instead of asm()
  x86/hweight: Use ASM_CALL_CONSTRAINT in inline asm()
  x86/hweight: Use named operands in inline asm()
  x86/stackprotector/64: Only export __ref_stack_chk_guard on CONFIG_SMP
  x86/head/64: Avoid Clang < 17 stack protector in startup code
  x86/kexec: Merge x86_32 and x86_64 code using macros from <asm/asm.h>
  x86/runtime-const: Add the RUNTIME_CONST_PTR assembly macro
  x86/cpu/intel: Limit the non-architectural constant_tsc model checks
  x86/mm/pat: Replace Intel x86_model checks with VFM ones
  x86/cpu/intel: Fix fast string initialization for extended Families
  ...
 2025-03-24 22:06:11 -07:00
Linus Torvalds
5a658afd46 Objtool changes for v6.15: 
- The biggest change is the new option to automatically fail
    the build on objtool warnings: CONFIG_OBJTOOL_WERROR.
 
    While there are no currently known unfixed false positives
    left, such an expansion in the severity of objtool warnings
    inevitably creates a risk of build failures, so it's disabled by
    default and depends on !COMPILE_TEST, so it shouldn't be enabled
    on allyesconfig/allmodconfig builds and won't be forced on people
    who just accept build-time defaults in 'make oldconfig'.
 
    While the option is strongly recommended, only people who enable
    it explicitly should see it.
 
    (Josh Poimboeuf)
 
  - Disable branch profiling in noinstr code with a broad
    brush that includes all of arch/x86/ and kernel/sched/. (Josh Poimboeuf)
 
  - Create backup object files on objtool errors and print exact
    objtool arguments to make failure analysis easier (Josh Poimboeuf)
 
  - Improve noreturn handling (Josh Poimboeuf)
 
  - Improve rodata handling (Tiezhu Yang)
 
  - Support jump tables, switch tables and goto tables on LoongArch (Tiezhu Yang)
 
  - Misc cleanups and fixes (Josh Poimboeuf, David Engraf, Ingo Molnar)
 
 Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'objtool-core-2025-03-22' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull objtool updates from Ingo Molnar:

 - The biggest change is the new option to automatically fail the build
   on objtool warnings: CONFIG_OBJTOOL_WERROR.

   While there are no currently known unfixed false positives left, such
   an expansion in the severity of objtool warnings inevitably creates a
   risk of build failures, so it's disabled by default and depends on
   !COMPILE_TEST, so it shouldn't be enabled on
   allyesconfig/allmodconfig builds and won't be forced on people who
   just accept build-time defaults in 'make oldconfig'.

   While the option is strongly recommended, only people who enable it
   explicitly should see it.

   (Josh Poimboeuf)

 - Disable branch profiling in noinstr code with a broad brush that
   includes all of arch/x86/ and kernel/sched/. (Josh Poimboeuf)

 - Create backup object files on objtool errors and print exact objtool
   arguments to make failure analysis easier (Josh Poimboeuf)

 - Improve noreturn handling (Josh Poimboeuf)

 - Improve rodata handling (Tiezhu Yang)

 - Support jump tables, switch tables and goto tables on LoongArch
   (Tiezhu Yang)

 - Misc cleanups and fixes (Josh Poimboeuf, David Engraf, Ingo Molnar)

* tag 'objtool-core-2025-03-22' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (22 commits)
  tracing: Disable branch profiling in noinstr code
  objtool: Use O_CREAT with explicit mode mask
  objtool: Add CONFIG_OBJTOOL_WERROR
  objtool: Create backup on error and print args
  objtool: Change "warning:" to "error:" for --Werror
  objtool: Add --Werror option
  objtool: Add --output option
  objtool: Upgrade "Linked object detected" warning to error
  objtool: Consolidate option validation
  objtool: Remove --unret dependency on --rethunk
  objtool: Increase per-function WARN_FUNC() rate limit
  objtool: Update documentation
  objtool: Improve __noreturn annotation warning
  objtool: Fix error handling inconsistencies in check()
  x86/traps: Make exc_double_fault() consistently noreturn
  LoongArch: Enable jump table for objtool
  objtool/LoongArch: Add support for goto table
  objtool/LoongArch: Add support for switch table
  objtool: Handle PC relative relocation type
  objtool: Handle different entry size of rodata
  ...
 2025-03-24 21:18:05 -07:00
Linus Torvalds
f81c2b8150 It has been a reasonably busy cycle for docs... 
- Significant changes throughout the tree to bring Python code up to
   current standards and raise the minimum Python required to 3.9.  Much of
   this is preparatory to replacing the ancient Perl scripts/kernel-doc
   horror with a slightly less horrifying Python implementation, expected
   for 6.16.
 
 - Update the minimum Sphinx required to 3.4.3, allowing us to remove a
   bunch of older compatibility code.
 
 - Rework and improve the generation of the ABI documentation.
 
   (All of the above done by Mauro)
 
 - Lots of translation updates.  Alex Shi and Yanteng Si are taking on
   responsibility for the Chinese translations going forward; that work will
   still get to you via docs-next
 
 - Try to standardize the format for indicating a developer's affiliation in
   commit tags.
 
 - Clarify the TAB's role in CoC enforcement actions.
 
 - Try to spell out the rules for when a commit tag can name another
   developer without their explicit permission.
 
 Plus lots of other typo fixes and updates.
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Merge tag 'docs-6.15' of git://git.lwn.net/linux

Pull documentation updates from Jonathan Corbet:
 "It has been a reasonably busy cycle for docs...

   - Significant changes throughout the tree to bring Python code up to
     current standards and raise the minimum Python required to 3.9

     Much of this is preparatory to replacing the ancient Perl
     scripts/kernel-doc horror with a slightly less horrifying Python
     implementation, expected for 6.16

   - Update the minimum Sphinx required to 3.4.3, allowing us to remove
     a bunch of older compatibility code

   - Rework and improve the generation of the ABI documentation

  (All of the above done by Mauro)

   - Lots of translation updates. Alex Shi and Yanteng Si are taking on
     responsibility for the Chinese translations going forward; that
     work will still get to you via docs-next

   - Try to standardize the format for indicating a developer's
     affiliation in commit tags

   - Clarify the TAB's role in CoC enforcement actions

   - Try to spell out the rules for when a commit tag can name another
     developer without their explicit permission

  Plus lots of other typo fixes and updates"

* tag 'docs-6.15' of git://git.lwn.net/linux: (98 commits)
  docs/zh_CN: fix spelling mistake
  docs/Chinese: change the disclaimer words
  docs/zh_CN: Add snp-tdx-threat-model index Chinese translation
  docs: driver-api: firmware: clarify userspace requirements
  docs: clarify rules wrt tagging other people
  docs: Remove outdated highuid.rst documentation
  Documentation: dma-buf: heaps: Add heap name definitions
  docs/.../submit-checklist: Use Documentation/admin-guide/abi.rst for cross-ref of README
  docs: Correct installation instruction
  Documentation: kcsan: fix "Plain Accesses and Data Races" URL in kcsan.rst
  Documentation/CoC: Spell out the TAB role in enforcement decisions
  Documentation: ocxl.rst: Update consortium site
  scripts: get_feat.pl: substitute s390x with s390
  scripts/kernel-doc: drop dead code for Wcontents_before_sections
  scripts/kernel-doc: don't add not needed new lines
  docs: driver-api/infiniband.rst: fix Kerneldoc markup
  drivers: firewire: firewire-cdev.h: fix identation on a kernel-doc markup
  drivers: media: intel-ipu3.h: fix identation on a kernel-doc markup
  include/asm-generic/io.h: fix kerneldoc markup
  Docs/arch/arm64: Fix spelling in amu.rst
  ...
 2025-03-24 18:42:27 -07:00
Linus Torvalds
fc13a78e1f hardening updates for v6.15-rc1 
- loadpin: remove unsupported MODULE_COMPRESS_NONE (Arulpandiyan Vadivel)
 
 - samples/check-exec: Fix script name (Mickaël Salaün)
 
 - yama: remove needless locking in yama_task_prctl() (Oleg Nesterov)
 
 - lib/string_choices: Sort by function name (R Sundar)
 
 - hardening: Allow default HARDENED_USERCOPY to be set at compile time
   (Mel Gorman)
 
 - uaccess: Split out compile-time checks into ucopysize.h
 
 - kbuild: clang: Support building UM with SUBARCH=i386
 
 - x86: Enable i386 FORTIFY_SOURCE on Clang 16+
 
 - ubsan/overflow: Rework integer overflow sanitizer option
 
 - Add missing __nonstring annotations for callers of memtostr*()/strtomem*()
 
 - Add __must_be_noncstr() and have memtostr*()/strtomem*() check for it
 
 - Introduce __nonstring_array for silencing future GCC 15 warnings
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Merge tag 'hardening-v6.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux

Pull hardening updates from Kees Cook:
 "As usual, it's scattered changes all over. Patches touching things
  outside of our traditional areas in the tree have been Acked by
  maintainers or were trivial changes:

   - loadpin: remove unsupported MODULE_COMPRESS_NONE (Arulpandiyan
     Vadivel)

   - samples/check-exec: Fix script name (Mickaël Salaün)

   - yama: remove needless locking in yama_task_prctl() (Oleg Nesterov)

   - lib/string_choices: Sort by function name (R Sundar)

   - hardening: Allow default HARDENED_USERCOPY to be set at compile
     time (Mel Gorman)

   - uaccess: Split out compile-time checks into ucopysize.h

   - kbuild: clang: Support building UM with SUBARCH=i386

   - x86: Enable i386 FORTIFY_SOURCE on Clang 16+

   - ubsan/overflow: Rework integer overflow sanitizer option

   - Add missing __nonstring annotations for callers of
     memtostr*()/strtomem*()

   - Add __must_be_noncstr() and have memtostr*()/strtomem*() check for
     it

   - Introduce __nonstring_array for silencing future GCC 15 warnings"

* tag 'hardening-v6.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux: (26 commits)
  compiler_types: Introduce __nonstring_array
  hardening: Enable i386 FORTIFY_SOURCE on Clang 16+
  x86/build: Remove -ffreestanding on i386 with GCC
  ubsan/overflow: Enable ignorelist parsing and add type filter
  ubsan/overflow: Enable pattern exclusions
  ubsan/overflow: Rework integer overflow sanitizer option to turn on everything
  samples/check-exec: Fix script name
  yama: don't abuse rcu_read_lock/get_task_struct in yama_task_prctl()
  kbuild: clang: Support building UM with SUBARCH=i386
  loadpin: remove MODULE_COMPRESS_NONE as it is no longer supported
  lib/string_choices: Rearrange functions in sorted order
  string.h: Validate memtostr*()/strtomem*() arguments more carefully
  compiler.h: Introduce __must_be_noncstr()
  nilfs2: Mark on-disk strings as nonstring
  uapi: stddef.h: Introduce __kernel_nonstring
  x86/tdx: Mark message.bytes as nonstring
  string: kunit: Mark nonstring test strings as __nonstring
  scsi: qla2xxx: Mark device strings as nonstring
  scsi: mpt3sas: Mark device strings as nonstring
  scsi: mpi3mr: Mark device strings as nonstring
  ...
 2025-03-24 15:18:08 -07:00
Linus Torvalds
fd101da676 vfs-6.15-rc1.mount 
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Merge tag 'vfs-6.15-rc1.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs

Pull vfs mount updates from Christian Brauner:

 - Mount notifications

   The day has come where we finally provide a new api to listen for
   mount topology changes outside of /proc/<pid>/mountinfo. A mount
   namespace file descriptor can be supplied and registered with
   fanotify to listen for mount topology changes.

   Currently notifications for mount, umount and moving mounts are
   generated. The generated notification record contains the unique
   mount id of the mount.

   The listmount() and statmount() api can be used to query detailed
   information about the mount using the received unique mount id.

   This allows userspace to figure out exactly how the mount topology
   changed without having to generating diffs of /proc/<pid>/mountinfo
   in userspace.

 - Support O_PATH file descriptors with FSCONFIG_SET_FD in the new mount
   api

 - Support detached mounts in overlayfs

   Since last cycle we support specifying overlayfs layers via file
   descriptors. However, we don't allow detached mounts which means
   userspace cannot user file descriptors received via
   open_tree(OPEN_TREE_CLONE) and fsmount() directly. They have to
   attach them to a mount namespace via move_mount() first.

   This is cumbersome and means they have to undo mounts via umount().
   Allow them to directly use detached mounts.

 - Allow to retrieve idmappings with statmount

   Currently it isn't possible to figure out what idmapping has been
   attached to an idmapped mount. Add an extension to statmount() which
   allows to read the idmapping from the mount.

 - Allow creating idmapped mounts from mounts that are already idmapped

   So far it isn't possible to allow the creation of idmapped mounts
   from already idmapped mounts as this has significant lifetime
   implications. Make the creation of idmapped mounts atomic by allow to
   pass struct mount_attr together with the open_tree_attr() system call
   allowing to solve these issues without complicating VFS lookup in any
   way.

   The system call has in general the benefit that creating a detached
   mount and applying mount attributes to it becomes an atomic operation
   for userspace.

 - Add a way to query statmount() for supported options

   Allow userspace to query which mount information can be retrieved
   through statmount().

 - Allow superblock owners to force unmount

* tag 'vfs-6.15-rc1.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs: (21 commits)
  umount: Allow superblock owners to force umount
  selftests: add tests for mount notification
  selinux: add FILE__WATCH_MOUNTNS
  samples/vfs: fix printf format string for size_t
  fs: allow changing idmappings
  fs: add kflags member to struct mount_kattr
  fs: add open_tree_attr()
  fs: add copy_mount_setattr() helper
  fs: add vfs_open_tree() helper
  statmount: add a new supported_mask field
  samples/vfs: add STATMOUNT_MNT_{G,U}IDMAP
  selftests: add tests for using detached mount with overlayfs
  samples/vfs: check whether flag was raised
  statmount: allow to retrieve idmappings
  uidgid: add map_id_range_up()
  fs: allow detached mounts in clone_private_mount()
  selftests/overlayfs: test specifying layers as O_PATH file descriptors
  fs: support O_PATH fds with FSCONFIG_SET_FD
  vfs: add notifications for mount attach and detach
  fanotify: notify on mount attach and detach
  ...
 2025-03-24 09:34:10 -07:00
Antonio Hickey
e1dfaa33fd rust: enable raw_ref_op feature 
Since Rust 1.82.0 the `raw_ref_op` feature is stable [1].

By enabling this feature we can use `&raw const place` and
`&raw mut place` instead of using `addr_of!(place)` and
`addr_of_mut!(place)` macros.

Allowing us to reduce macro complexity, and improve consistency
with existing reference syntax as `&raw const`, `&raw mut` are
similar to `&`, `&mut` making it fit more naturally with other
existing code.

Suggested-by: Benno Lossin <benno.lossin@proton.me>
Link: https://github.com/Rust-for-Linux/linux/issues/1148
Link: https://blog.rust-lang.org/2024/10/17/Rust-1.82.0.html#native-syntax-for-creating-a-raw-pointer [1]
Signed-off-by: Antonio Hickey <contact@antoniohickey.com>
Reviewed-by: Benno Lossin <benno.lossin@proton.me>
Reviewed-by: Andreas Hindborg <a.hindborg@kernel.org>
Reviewed-by: Tamir Duberstein <tamird@gmail.com>
Link: https://lore.kernel.org/r/20250320020740.1631171-2-contact@antoniohickey.com
[ Removed dashed line change as discussed. Added Link to the explanation
  of the feature in the Rust 1.82.0 release blog post. - Miguel ]
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
 2025-03-23 19:56:45 +01:00
Masahiro Yamada
8bdd53e066 kbuild: pacman-pkg: hardcode module installation path 
'make pacman-pkg' for architectures with device tree support (i.e., arm,
arm64, etc.) shows logs like follows:

  Installing dtbs...
    INSTALL /home/masahiro/linux/pacman/linux-upstream/pkg/linux-upstream/usr//lib/modules/6.14.0-rc6+/dtb/actions/s700-cubieboard7.dtb
    INSTALL /home/masahiro/linux/pacman/linux-upstream/pkg/linux-upstream/usr//lib/modules/6.14.0-rc6+/dtb/actions/s900-bubblegum-96.dtb
    INSTALL /home/masahiro/linux/pacman/linux-upstream/pkg/linux-upstream/usr//lib/modules/6.14.0-rc6+/dtb/airoha/en7581-evb.dtb
      ...

The double slashes ('//') between 'usr' and 'lib' are somewhat ugly.

Let's hardcode the module installation path because the package contents
should remain unaffected even if ${MODLIB} is overridden. Please note that
scripts/packages/{builddeb,kernel.spec} also hardcode the module
installation path.

With this change, the log will look better, as follows:

  Installing dtbs...
    INSTALL /home/masahiro/linux/pacman/linux-upstream/pkg/linux-upstream/usr/lib/modules/6.14.0-rc6+/dtb/actions/s700-cubieboard7.dtb
    INSTALL /home/masahiro/linux/pacman/linux-upstream/pkg/linux-upstream/usr/lib/modules/6.14.0-rc6+/dtb/actions/s900-bubblegum-96.dtb
    INSTALL /home/masahiro/linux/pacman/linux-upstream/pkg/linux-upstream/usr/lib/modules/6.14.0-rc6+/dtb/airoha/en7581-evb.dtb
      ...

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Acked-by: Thomas Weißschuh <linux@weissschuh.net>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
 2025-03-23 00:56:13 +09:00
Alexandru Gagniuc
6260406362 kbuild: deb-pkg: don't set KBUILD_BUILD_VERSION unconditionally 
In ThinPro, we use the convention <upstream_ver>+hp<patchlevel> for
the kernel package. This does not have a dash in the name or version.
This is built by editing ".version" before a build, and setting
EXTRAVERSION="+hp" and KDEB_PKGVERSION make variables:

    echo 68 > .version
    make -j<n> EXTRAVERSION="+hp" bindeb-pkg KDEB_PKGVERSION=6.12.2+hp69

    .deb name: linux-image-6.12.2+hp_6.12.2+hp69_amd64.deb

Since commit 7d4f07d5cb71 ("kbuild: deb-pkg: squash
scripts/package/deb-build-option to debian/rules"), this no longer
works. The deb build logic changed, even though, the commit message
implies that the logic should be unmodified.

Before, KBUILD_BUILD_VERSION was not set if the KDEB_PKGVERSION did
not contain a dash. After the change KBUILD_BUILD_VERSION is always
set to KDEB_PKGVERSION. Since this determines UTS_VERSION, the uname
output to look off:

    (now)      uname -a: version 6.12.2+hp ... #6.12.2+hp69
    (expected) uname -a: version 6.12.2+hp ... #69

Update the debian/rules logic to restore the original behavior.

Fixes: 7d4f07d5cb71 ("kbuild: deb-pkg: squash scripts/package/deb-build-option to debian/rules")
Signed-off-by: Alexandru Gagniuc <alexandru.gagniuc@hp.com>
Reviewed-by: Nicolas Schier <nicolas@fjasle.eu>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
 2025-03-23 00:56:12 +09:00
Jeff Johnson
6c6c1fc09d modpost: require a MODULE_DESCRIPTION() 
Since commit 1fffe7a34c89 ("script: modpost: emit a warning when the
description is missing"), a module without a MODULE_DESCRIPTION() has
resulted in a warning with make W=1. Since that time, all known
instances of this issue have been fixed. Therefore, now make it an
error if a MODULE_DESCRIPTION() is not present.

Signed-off-by: Jeff Johnson <jeff.johnson@oss.qualcomm.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
 2025-03-23 00:56:12 +09:00
Masahiro Yamada
a7a05b1b27 kbuild: deb-pkg: add comment about future removal of KDEB_COMPRESS 
'man dpkg-deb' describes as follows:

    DPKG_DEB_COMPRESSOR_TYPE
        Sets the compressor type to use (since dpkg 1.21.10).

        The -Z option overrides this value.

When commit 1a7f0a34ea7d ("builddeb: allow selection of .deb compressor")
was applied, dpkg-deb did not support this environment variable.

Later, dpkg commit c10aeffc6d71 ("dpkg-deb: Add support for
DPKG_DEB_COMPRESSOR_TYPE/LEVEL") introduced support for
DPKG_DEB_COMPRESSOR_TYPE, which provides the same functionality as
KDEB_COMPRESS.

KDEB_COMPRESS is still useful for users of older dpkg versions, but I
would like to remove this redundant functionality in the future.

This commit adds comments to notify users of the planned removal and to
encourage migration to DPKG_DEB_COMPRESSOR_TYPE where possible.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
 2025-03-22 23:50:58 +09:00
Masahiro Yamada
1c3107ec73 kbuild: deb-pkg: remove "version" variable in mkdebian 
${version} and ${KERNELRELEASE} are the same.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
 2025-03-22 23:50:58 +09:00
Masahiro Yamada
7e752910b8 kbuild: deb-pkg: fix versioning for -rc releases 
The version number with -rc should be considered older than the final
release.

For example, 6.14-rc1 should be older than 6.14, but to handle this
correctly (just like Debian kernel), "-rc" must be replace with "~rc".

  $ dpkg --compare-versions 6.14-rc1 lt 6.14
  $ echo $?
  1
  $ dpkg --compare-versions 6.14~rc1 lt 6.14
  $ echo $?
  0

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
 2025-03-22 23:50:58 +09:00
Paolo Abeni
f491593394 Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 
Cross-merge networking fixes after downstream PR (net-6.14-rc8).

Conflict:

tools/testing/selftests/net/Makefile
  03544faad761 ("selftest: net: add proc_net_pktgen")
  3ed61b8938c6 ("selftests: net: test for lwtunnel dst ref loops")

tools/testing/selftests/net/config:
  85cb3711acb8 ("selftests: net: Add test cases for link and peer netns")
  3ed61b8938c6 ("selftests: net: test for lwtunnel dst ref loops")

Adjacent commits:

tools/testing/selftests/net/Makefile
  c935af429ec2 ("selftests: net: add support for testing SO_RCVMARK and SO_RCVPRIORITY")
  355d940f4d5a ("Revert "selftests: Add IPv6 link-local address generation tests for GRE devices."")

Signed-off-by: Paolo Abeni <pabeni@redhat.com>
 2025-03-20 21:38:01 +01:00
Steven Rostedt
a926d15a79 scripts/tracing: Remove scripts/tracing/draw_functrace.py 
The draw_functrace.py hasn't worked in years. There's better ways to
accomplish the same thing (via libtracefs). Remove it.

Link: https://lore.kernel.org/linux-trace-kernel/20250210-debuginfo-v1-1-368feb58292a@purestorage.com/

Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Uday Shankar <ushankar@purestorage.com>
Cc: Masahiro Yamada <masahiroy@kernel.org>
Link: https://lore.kernel.org/20250307103941.070654e7@gandalf.local.home
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
 2025-03-20 07:02:21 -04:00
Ingo Molnar
89771319e0 Linux 6.14-rc7 
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Merge tag 'v6.14-rc7' into x86/core, to pick up fixes

Signed-off-by: Ingo Molnar <mingo@kernel.org>
 2025-03-19 11:03:06 +01:00
Philipp Hahn
bc2f19d653 checkpatch: describe --min-conf-desc-length 
Neither the warning nor the help message gives any hint on the unit for
length: Could be meters, inches, bytes, characters or ...  lines.

Extend the output of `--help` to name the unit "lines" and the default:
-  --min-conf-desc-length=n   set the min description length, if shorter, warn
+  --min-conf-desc-length=n   set the minimum description length for config symbols
+                             in lines, if shorter, warn (default 4)

Include the minimum number of lines as other error messages already do:
- WARNING: please write a help paragraph that fully describes the config symbol
+ WARNING: please write a help paragraph that fully describes the config symbol with at least 4 lines

Link: https://lkml.kernel.org/r/c71c170c90eba26265951e248adfedd3245fe575.1741605695.git.p.hahn@avm.de
Signed-off-by: Philipp Hahn <p.hahn@avm.de>
Cc: Andy Whitcroft <apw@canonical.com>
Cc: Joe Perches <joe@perches.com>
Cc: Dwaipayan Ray <dwaipayanray1@gmail.com>
Cc: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2025-03-17 12:17:00 -07:00
Ilya Leoshkevich
28939c3e99 scripts/gdb/symbols: determine KASLR offset on s390 
Use QEMU's qemu.PhyMemMode [1] functionality to read vmcore from the
physical memory the same way the existing dump tooling does this. 
Gracefully handle non-QEMU targets, early boot, and memory corruptions;
print a warning if such situation is detected.

[1] https://qemu-project.gitlab.io/qemu/system/gdb.html#examining-physical-memory

Link: https://lkml.kernel.org/r/20250303110437.79070-1-iii@linux.ibm.com
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Acked-by: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Alexander Gordeev <agordeev@linux.ibm.com>
Cc: Andrew Donnellan <ajd@linux.ibm.com>
Cc: Christian Borntraeger <borntraeger@linux.ibm.com>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Kieran Bingham <kbingham@kernel.org>
Cc: Nina Schoetterl-Glausch <nsg@linux.ibm.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2025-03-17 12:17:00 -07:00
Antonio Quartulli
e0349c46cb scripts/gdb/linux/symbols.py: address changes to module_sect_attrs 
When loading symbols from kernel modules we used to iterate
from 0 to module_sect_attrs::nsections, in order to
retrieve their name and address.

However module_sect_attrs::nsections has been removed from
the struct by a previous commit.

Re-arrange the iteration by accessing all items in
module_sect_attrs::grp::bin_attrs[] until NULL is found
(it's a NULL terminated array).

At the same time the symbol address cannot be extracted
from module_sect_attrs::attrs[]::address anymore because
it has also been deleted. Fetch it from
module_sect_attrs::grp::bin_attrs[]::private as described
in 4b2c11e4aaf7.

Link: https://lkml.kernel.org/r/20250221204034.4430-1-antonio@mandelbit.com
Fixes: d8959b947a8d ("module: sysfs: Drop member 'module_sect_attrs::nsections'")
Fixes: 4b2c11e4aaf7 ("module: sysfs: Drop member 'module_sect_attr::address'")
Signed-off-by: Antonio Quartulli <antonio@mandelbit.com>
Reviewed-by: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Thomas Weißschuh <linux@weissschuh.net>
Cc: Kieran Bingham <kbingham@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2025-03-17 12:16:59 -07:00
Josh Poimboeuf
36799069b4 objtool: Add CONFIG_OBJTOOL_WERROR 
Objtool warnings can be indicative of crashes, broken live patching, or
even boot failures.  Ignoring them is not recommended.

Add CONFIG_OBJTOOL_WERROR to upgrade objtool warnings to errors by
enabling the objtool --Werror option.  Also set --backtrace to print the
branches leading up to the warning, which can help considerably when
debugging certain warnings.

To avoid breaking bots too badly for now, make it the default for real
world builds only (!COMPILE_TEST).

Co-developed-by: Brendan Jackman <jackmanb@google.com>
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/3e7c109313ff15da6c80788965cc7450115b0196.1741975349.git.jpoimboe@kernel.org
 2025-03-17 11:51:44 +01:00
Easwar Hariharan
15c200eaf5 coccinelle: misc: secs_to_jiffies: Patch expressions too 
Patch series "Converge on using secs_to_jiffies() part two", v3.

This is the second series that converts users of msecs_to_jiffies() that
either use the multiply pattern of either of:
- msecs_to_jiffies(N*1000) or
- msecs_to_jiffies(N*MSEC_PER_SEC)

where N is a constant or an expression, to avoid the multiplication.

The conversion is made with Coccinelle with the secs_to_jiffies() script
in scripts/coccinelle/misc.  Attention is paid to what the best change can
be rather than restricting to what the tool provides.


This patch (of 16):

Teach the script to suggest conversions for timeout patterns where the
arguments to msecs_to_jiffies() are expressions as well.

Link: https://lkml.kernel.org/r/20250225-converge-secs-to-jiffies-part-two-v3-0-a43967e36c88@linux.microsoft.com
Link: https://lkml.kernel.org/r/20250225-converge-secs-to-jiffies-part-two-v3-1-a43967e36c88@linux.microsoft.com
Signed-off-by: Easwar Hariharan <eahariha@linux.microsoft.com>
Cc: Mark Brown <broonie@kernel.org>
Cc: Carlos Maiolino <cem@kernel.org>
Cc: Chris Mason <clm@fb.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Damien Le Maol <dlemoal@kernel.org>
Cc: "Darrick J. Wong" <djwong@kernel.org>
Cc: David Sterba <dsterba@suse.com>
Cc: Dick Kennedy <dick.kennedy@broadcom.com>
Cc: Dongsheng Yang <dongsheng.yang@easystack.cn>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: Frank Li <frank.li@nxp.com>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Cc: Ilpo Jarvinen <ilpo.jarvinen@linux.intel.com>
Cc: Ilya Dryomov <idryomov@gmail.com>
Cc: James Bottomley <james.bottomley@HansenPartnership.com>
Cc: James Smart <james.smart@broadcom.com>
Cc: Jaroslav Kysela <perex@perex.cz>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Josef Bacik <josef@toxicpanda.com>
Cc: Julia Lawall <julia.lawall@inria.fr>
Cc: Kalesh Anakkur Purayil <kalesh-anakkur.purayil@broadcom.com>
Cc: Keith Busch <kbusch@kernel.org>
Cc: Leon Romanovsky <leon@kernel.org>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>
Cc: Nicolas Palix <nicolas.palix@imag.fr>
Cc: Niklas Cassel <cassel@kernel.org>
Cc: Oded Gabbay <ogabbay@kernel.org>
Cc: Takashi Iwai <tiwai@suse.de>
Cc: Sagi Grimberg <sagi@grimberg.me>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Sebastian Reichel <sre@kernel.org>
Cc: Selvin Thyparampil Xavier <selvin.xavier@broadcom.com>
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: Shyam-sundar S-k <Shyam-sundar.S-k@amd.com>
Cc: Takashi Iwai <tiwai@suse.com>
Cc: Xiubo Li <xiubli@redhat.com>
Cc: Carlos Maiolino <cmaiolino@redhat.com>
Cc: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2025-03-16 23:24:15 -07:00
Brendan Jackman
4022918876 scripts/gdb: add $lx_per_cpu_ptr() 
We currently have $lx_per_cpu() which works fine for stuff that kernel
code would access via per_cpu().  But this doesn't work for stuff that
kernel code accesses via per_cpu_ptr():

(gdb) p $lx_per_cpu(node_data[1].node_zones[2]->per_cpu_pageset)
Cannot access memory at address 0xffff11105fbd6c28

This is because we take the address of the pointer and use that as the
offset, instead of using the stored value.

Add a GDB version that mirrors the kernel API, which uses the pointer
value.

To be consistent with per_cpu_ptr(), we need to return the pointer value
instead of dereferencing it for the user.  Therefore, move the existing
dereference out of the per_cpu() Python helper and do that only in the
$lx_per_cpu() implementation.

Link: https://lkml.kernel.org/r/20250220-lx-per-cpu-ptr-v2-1-945dee8d8d38@google.com
Signed-off-by: Brendan Jackman <jackmanb@google.com>
Reviewed-by: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Florian Rommel <mail@florommel.de>
Cc: Kieran Bingham <kbingham@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2025-03-16 23:24:15 -07:00
Vlastimil Babka
6ba31721ae get_maintainer: stop reporting subsystem status as maintainer role 
After introducing the --substatus option, we can stop adjusting the
reported maintainer role by the subsystem's status.

For compatibility with the --git-chief-penguins option, keep the "chief
penguin" role.

Link: https://lkml.kernel.org/r/20250203-b4-get_maintainer-v2-2-83ba008b491f@suse.cz
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Tested-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Cc: Joe Perches <joe@perches.com>
Cc: Kees Cook <kees@kernel.org>
Cc: Ted Ts'o <tytso@mit.edu>
Cc: Thorsten Leemhuis <linux@leemhuis.info>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2025-03-16 22:30:49 -07:00
Vlastimil Babka
9ad18c8555 get_maintainer: add --substatus for reporting subsystem status 
Patch series "get_maintainer: report subsystem status separately", v2.

The subsystem status (S: field) can inform a patch submitter if the
subsystem is well maintained or e.g.  maintainers are missing.  In
get_maintainer, it is currently reported with --role(stats) by adjusting
the maintainer role for any status different from Maintained.  This has
two downsides:

- if a subsystem has only reviewers or mailing lists and no maintainers,
  the status is not reported. For example Orphan subsystems typically
  have no maintainers so there's nobody to report as orphan minder.

- the Supported status means that someone is paid for maintaining, but
  it is reported as "supporter" for all the maintainers, which can be
  incorrect (only some of them may be paid). People (including myself)
  have been also confused about what "supporter" means.

The second point has been brought up in 2022 and the discussion in the end
resulted in adjusting documentation only [1].  I however agree with Ted's
points that it's misleading to take the subsystem status and apply it to
all maintainers [2].

The attempt to modify get_maintainer output was retracted after Joe
objected that the status becomes not reported at all [3].  This series
addresses that concern by reporting the status (unless it's the most
common Maintained one) on separate lines that follow the reported emails,
using a new --substatus parameter.  Care is taken to reduce the noise to
minimum by not reporting the most common Maintained status, by default
require no opt-in that would need the users to discover the new parameter,
and at the same time not to break existing git --cc-cmd usage.

[1] https://lore.kernel.org/all/20221006162413.858527-1-bryan.odonoghue@linaro.org/
[2] https://lore.kernel.org/all/Yzen4X1Na0MKXHs9@mit.edu/
[3] https://lore.kernel.org/all/30776fe75061951777da8fa6618ae89bea7a8ce4.camel@perches.com/


This patch (of 2):

The subsystem status is currently reported with --role(stats) by adjusting
the maintainer role for any status different from Maintained.  This has
two downsides:

- if a subsystem has only reviewers or mailing lists and no maintainers,
  the status is not reported (i.e. typically, Orphan subsystems have no
  maintainers)

- the Supported status means that someone is paid for maintaining, but
  it is reported as "supporter" for all the maintainers, which can be
  incorrect. People have been also confused about what "supporter"
  means.

This patch introduces a new --substatus option and functionality aimed to
report the subsystem status separately, without adjusting the reported
maintainer role.  After the e-mails are output, the status of subsystems
will follow, for example:

...
linux-kernel@vger.kernel.org (open list:LIBRARY CODE)
LIBRARY CODE status: Supported

In order to allow replacing the role rewriting seamlessly, the new
option works as follows:

- it is automatically enabled when --email and --role are enabled
  (the defaults include --email and --rolestats which implies --role)

- usages with --norolestats e.g. for git's --cc-cmd will thus need no
  adjustments

- the most common Maintained status is not reported at all, to reduce
  unnecessary noise

- THE REST catch-all section (contains lkml) status is not reported

- the existing --subsystem and --status options are unaffected so their
  users will need no adjustments

[vbabka@suse.cz: require that script output goes to a terminal]
  Link: https://lkml.kernel.org/r/66c2bf7a-9119-4850-b6b8-ac8f426966e1@suse.cz
Link: https://lkml.kernel.org/r/20250203-b4-get_maintainer-v2-0-83ba008b491f@suse.cz
Link: https://lkml.kernel.org/r/20250203-b4-get_maintainer-v2-1-83ba008b491f@suse.cz
Fixes: c1565b6f7b53 ("get_maintainer: add --substatus for reporting subsystem status")
Closes: https://lore.kernel.org/all/7aodxv46lj6rthjo4i5zhhx2lybrhb4uknpej2dyz3e7im5w3w@w23bz6fx3jnn/
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Uwe Kleine-K=F6nig <u.kleine-koenig@baylibre.com>
Cc: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Cc: Joe Perches <joe@perches.com>
Cc: Kees Cook <kees@kernel.org>
Cc: Ted Ts'o <tytso@mit.edu>
Cc: Thorsten Leemhuis <linux@leemhuis.info>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2025-03-16 22:30:49 -07:00
Guilherme G. Piccoli
35dac71cff scripts: add script to extract built-in firmware blobs 
There is currently no tool to extract a firmware blob that is built-in
on vmlinux to the best of my knowledge.  So if we have a kernel image
containing the blobs, and we want to rebuild the kernel with some debug
patches for example (and given that the image also has IKCONFIG=y), we
currently can't do that for the same versions for all the firmware
blobs, _unless_ we have exact commits of linux-firmware for the
specific versions for each firmware included.

Through the options CONFIG_EXTRA_FIRMWARE{_DIR} one is able to build a
kernel including firmware blobs in a built-in fashion.  This is usually
the case of built-in drivers that require some blobs in order to work
properly, for example, like in non-initrd based systems.

Add hereby a script to extract these blobs from a non-stripped vmlinux,
similar to the idea of "extract-ikconfig".  The firmware loader interface
saves such built-in blobs as rodata entries, having a field for the FW
name as "_fw_<module_name>_<firmware_name>_bin"; the tool extracts files
named "<module_name>_<firmware_name>" for each rodata firmware entry
detected.  It makes use of awk, bash, dd and readelf, pretty standard
tooling for Linux development.

With this tool, we can blindly extract the FWs and easily re-add them
in the new debug kernel build, allowing a more deterministic testing
without the burden of "hunting down" the proper version of each
firmware binary.

Link: https://lkml.kernel.org/r/20250120190436.127578-1-gpiccoli@igalia.com
Signed-off-by: Guilherme G. Piccoli <gpiccoli@igalia.com>
Suggested-by: Thadeu Lima de Souza Cascardo <cascardo@igalia.com>
Reviewed-by: Thadeu Lima de Souza Cascardo <cascardo@igalia.com>
Cc: Danilo Krummrich <dakr@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Luis Chamberalin <mcgrof@kernel.org>
Cc: Masahiro Yamada <masahiroy@kernel.org>
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: Nicolas Schier <nicolas@fjasle.eu>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Cc: Russ Weight <russ.weight@linux.dev>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2025-03-16 22:30:46 -07:00
Benno Lossin
dbd5058ba6 rust: make pin-init its own crate 
Rename relative paths inside of the crate to still refer to the same
items, also rename paths inside of the kernel crate and adjust the build
system to build the crate.

[ Remove the `expect` (and thus the `lint_reasons` feature) since
  the tree now uses `quote!` from `rust/macros/export.rs`. Remove the
  `TokenStream` import removal, since it is now used as well.

  In addition, temporarily (i.e. just for this commit) use an `--extern
  force:alloc` to prevent an unknown `new_uninit` error in the `rustdoc`
  target. For context, please see a similar case in:

      https://lore.kernel.org/lkml/20240422090644.525520-1-ojeda@kernel.org/

  And adjusted the message above. - Miguel ]

Signed-off-by: Benno Lossin <benno.lossin@proton.me>
Reviewed-by: Fiona Behrens <me@kloenk.dev>
Tested-by: Andreas Hindborg <a.hindborg@kernel.org>
Link: https://lore.kernel.org/r/20250308110339.2997091-16-benno.lossin@proton.me
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
 2025-03-16 21:59:19 +01:00
Miguel Ojeda
d7659acca7 rust: add pin-init crate build infrastructure 
Add infrastructure for moving the initialization API to its own crate.
Covers all make targets such as `rust-analyzer` and `rustdoc`. The tests
of pin-init are not added to `rusttest`, as they are already tested in
the user-space repository [1].

Link: https://github.com/Rust-for-Linux/pin-init [1]
Co-developed-by: Benno Lossin <benno.lossin@proton.me>
Signed-off-by: Benno Lossin <benno.lossin@proton.me>
Tested-by: Andreas Hindborg <a.hindborg@kernel.org>
Link: https://lore.kernel.org/r/20250308110339.2997091-15-benno.lossin@proton.me
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
 2025-03-16 21:59:19 +01:00
Ard Biesheuvel
ac4f06789b kbuild: Create intermediate vmlinux build with relocations preserved 
The imperative paradigm used to build vmlinux, extract some info from it
or perform some checks on it, and subsequently modify it again goes
against the declarative paradigm that is usually employed for defining
make rules.

In particular, the Makefile.postlink files that consume their input via
an output rule result in some dodgy logic in the decompressor makefiles
for RISC-V and x86, given that the vmlinux.relocs input file needed to
generate the arch-specific relocation tables may not exist or be out of
date, but cannot be constructed using the ordinary Make dependency based
rules, because the info needs to be extracted while vmlinux is in its
ephemeral, non-stripped form.

So instead, for architectures that require the static relocations that
are emitted into vmlinux when passing --emit-relocs to the linker, and
are subsequently stripped out again, introduce an intermediate vmlinux
target called vmlinux.unstripped, and organize the reset of the build
logic accordingly:

- vmlinux.unstripped is created only once, and not updated again
- build rules under arch/*/boot can depend on vmlinux.unstripped without
  running the risk of the data disappearing or being out of date
- the final vmlinux generated by the build is not bloated with static
  relocations that are never needed again after the build completes.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
 2025-03-17 00:29:50 +09:00
Ard Biesheuvel
e22bbb8e97 kbuild: link-vmlinux.sh: Make output file name configurable 
In order to introduce an intermediate, non-stripped vmlinux build that
can be used by other build steps as an input, pass the output file name
to link-vmlinux.sh via its command line.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
 2025-03-17 00:29:45 +09:00
Linus Torvalds
cd3a56ac2d Rust fixes for v6.14 (3rd) 
Toolchain and infrastructure:
 
  - Disallow BTF generation with Rust + LTO.
 
  - Improve rust-analyzer support.
 
 'kernel' crate:
 
  - 'init' module: remove 'Zeroable' implementation for a couple types
    that should not have it.
 
  - 'alloc' module: fix macOS failure in host test by satisfying POSIX
    alignment requirement.
 
  - Add missing '\n's to 'pr_*!()' calls.
 
 And a couple other minor cleanups.
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Merge tag 'rust-fixes-6.14-3' of git://git.kernel.org/pub/scm/linux/kernel/git/ojeda/linux

Pull rust fixes from Miguel Ojeda:
 "Toolchain and infrastructure:

   - Disallow BTF generation with Rust + LTO

   - Improve rust-analyzer support

  'kernel' crate:

   - 'init' module: remove 'Zeroable' implementation for a couple types
     that should not have it

   - 'alloc' module: fix macOS failure in host test by satisfying POSIX
     alignment requirement

   - Add missing '\n's to 'pr_*!()' calls

  And a couple other minor cleanups"

* tag 'rust-fixes-6.14-3' of git://git.kernel.org/pub/scm/linux/kernel/git/ojeda/linux:
  scripts: generate_rust_analyzer: add uapi crate
  scripts: generate_rust_analyzer: add missing include_dirs
  scripts: generate_rust_analyzer: add missing macros deps
  rust: Disallow BTF generation with Rust + LTO
  rust: task: fix `SAFETY` comment in `Task::wake_up`
  rust: workqueue: add missing newline to pr_info! examples
  rust: sync: add missing newline in locked_by log example
  rust: init: add missing newline to pr_info! calls
  rust: error: add missing newline to pr_warn! calls
  rust: docs: add missing newline to printing macro examples
  rust: alloc: satisfy POSIX alignment requirement
  rust: init: fix `Zeroable` implementation for `Option<NonNull<T>>` and `Option<KBox<T>>`
  rust: remove leftover mentions of the `alloc` crate
 2025-03-15 15:40:42 -10:00
Masahiro Yamada
ba4d705046 kbuild: do not generate .tmp_vmlinux*.map when CONFIG_VMLINUX_MAP=y 
Commit 5cc124720461 ("kbuild: add CONFIG_VMLINUX_MAP expert option")
mentioned that "the .map file can be rather large (several MB), and
that's a waste of space when one isn't interested in these things."

If that is the case, generating map files for the intermediate
tmp_vmlinux* files is also a waste of space. It is unlikely that
anyone would be interested in the .tmp_vmlinux*.map files.

This commit stops passing the -Map= option when linking the .tmp_vmlinux*
intermediates.

I also hard-coded the file name 'vmlinux.map' instead of ${output}.map
because a later commit will introduce vmlinux.unstripped but I want to
keep the current name of the map file.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
 2025-03-15 21:22:52 +09:00
Kris Van Hees
87bb368d06 kbuild: exclude .rodata.(cst|str)* when building ranges 
The .rodata.(cst|str)* sections are often resized during the final
linking and since these sections do not cover actual symbols there is
no need to include them in the modules.builtin.ranges data.

When these sections were included in processing and resizing occurred,
modules were reported with ranges that extended beyond their true end,
causing subsequent symbols (in address order) to be associated with
the wrong module.

Fixes: 5f5e7344322f ("kbuild: generate offset range data for builtin modules")
Cc: stable@vger.kernel.org
Signed-off-by: Kris Van Hees <kris.van.hees@oracle.com>
Reviewed-by: Jack Vogel <jack.vogel@oracle.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
 2025-03-15 21:22:52 +09:00
Masahiro Yamada
eb47ee0181 kbuild: add Kbuild bash completion 
Kernel build commands can sometimes be long, particularly when
cross-compiling, making them tedious to type and prone to mistypes.

This commit introduces bash completion support for common variables
and targets in Kbuild.

For installation instructions, please refer to the documentation in
Documentation/kbuild/bash-completion.rst.

The following examples demonstrate how this saves typing.

[Example 1] a long command line for cross-compiling

  $ make A<TAB>
   -> completes 'A' to 'ARCH='

  $ make ARCH=<TAB>
   -> displays all supported architectures

  $ make ARCH=arm64 CR<TAB>
   -> completes 'CR' to 'CROSS_COMPILE='

  $ make ARCH=arm64 CROSS_COMPILE=<TAB>
   -> displays installed toolchains

  $ make ARCH=arm64 CROSS_COMPILE=aa<TAB>
   -> completes 'CROSS_COMPILE=aa' to 'CROSS_COMPILE=aarch64-linux-gnu-'

  $ make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- def<TAB>
   -> completes 'def' to 'defconfig'

[Example 2] a single build target

  $ make f<TAB>
   -> completes 'f' to 'fs/'

  $ make fs/<TAB>
   -> displays objects and sub-directories in fs/

  $ make fs/xf<TAB>
   -> completes 'fs/xf' to 'fs/xfs/'

  $ make fs/xfs/l<TAB>
   -> completes 'fs/xfs/l' to 'fs/xfs/libxfs/xfs_'

  $ make fs/xfs/libxfs/xfs_g<TAB>
   -> completes 'fs/xfs/libxfs/xfs_g' to 'fs/xfs/libxfs/xfs_group.o'

This does not aim to provide a complete list of variables and targets,
as there are too many. However, it covers variables and targets used
in common scenarios, and I hope this is useful enough.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nicolas Schier <n.schier@avm.de>
Tested-by: Nicolas Schier <n.schier@avm.de>
 2025-03-15 21:22:52 +09:00
Seyediman Seyedarab
f757f6011c kbuild: fix argument parsing in scripts/config 
The script previously assumed --file was always the first argument,
which caused issues when it appeared later. This patch updates the
parsing logic to scan all arguments to find --file, sets the config
file correctly, and resets the argument list with the remaining
commands.

It also fixes --refresh to respect --file by passing KCONFIG_CONFIG=$FN
to make oldconfig.

Signed-off-by: Seyediman Seyedarab <imandevel@gmail.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
 2025-03-15 21:22:42 +09:00
Xi Ruoyao
82c09de2d4 kbuild: add dependency from vmlinux to sorttable 
Without this dependency it's really puzzling when we bisect for a "bad"
commit in a series of sorttable change: when "git bisect" switches to
another commit, "make" just does nothing to vmlinux.

Signed-off-by: Xi Ruoyao <xry111@xry111.site>
Acked-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
 2025-03-15 21:19:44 +09:00
WangYuli
1195306ee3 kbuild: deb-pkg: add debarch for ARCH=loongarch64 
Fix follow warning when 'make ARCH=loongarch64 bindeb-pkg':

  ** ** **  WARNING  ** ** **

  Your architecture doesn't have its equivalent
  Debian userspace architecture defined!
  Falling back to the current host architecture (loong64).
  Please add support for loongarch64 to ./scripts/package/mkdebian ...

Reported-by: Shiwei Liu <liushiwei@anheng.com.cn>
Signed-off-by: WangYuli <wangyuli@uniontech.com>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
 2025-03-15 21:19:44 +09:00
Masahiro Yamada
c15253494f kbuild: move -fzero-init-padding-bits=all to the top-level Makefile 
The -fzero-init-padding-bits=all option is not a warning flag, so
defining it in scripts/Makefile.extrawarn is inconsistent.

Move it to the top-level Makefile for consistency.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Reviewed-by: Kees Cook <kees@kernel.org>
 2025-03-15 21:19:44 +09:00
Uday Shankar
9d702bb1d3 scripts: make python shebangs specific about desired version 
The RPM packaging tools like to make sure that all packaged python
scripts have version-unambiguous shebangs. Be more specific about the
desired python version in a couple of places to avoid having to disable
these checks in make rpm-pkg.

Signed-off-by: Uday Shankar <ushankar@purestorage.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
 2025-03-15 21:19:44 +09:00
Miguel Ojeda
ac954145e1 kbuild: rust: add rustc-min-version support function 
Introduce `rustc-min-version` support function that mimics
`{gcc,clang}-min-version` ones, following commit 88b61e3bff93
("Makefile.compiler: replace cc-ifversion with compiler-specific macros").

In addition, use it in the first use case we have in the kernel (which
was done independently to minimize the changes needed for the fix).

Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
Reviewed-by: Fiona Behrens <me@Kloenk.dev>
Reviewed-by: Nicolas Schier <n.schier@avm.de>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
 2025-03-15 21:19:32 +09:00
Masahiro Yamada
144fced685 modpost: use strstarts() to clean up parse_source_files() 
No functional changes are intended.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nicolas Schier <nicolas@fjasle.eu>
 2025-03-15 21:16:22 +09:00
Masahiro Yamada
59d60d26a5 modpost: introduce get_basename() helper 
The logic to retrieve the basename appears multiple times.
Factor out the common pattern into a helper function.

I copied kbasename() from include/linux/string.h and renamed it
to get_basename().

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nicolas Schier <nicolas@fjasle.eu>
 2025-03-15 21:16:21 +09:00
Masahiro Yamada
ab5bc764bd kconfig: remove unnecessary cast in sym_get_string() 
The explicit casting from (char *) to (const char *) is unneeded.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
 2025-03-15 21:16:21 +09:00