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treewide: drop outdated compiler version remarks in Kconfig help texts

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As of writing, Documentation/Changes states the minimal versions of GNU C
being 8.1, Clang being 15.0.0 and binutils being 2.30.  A few Kconfig help
texts are pointing out that specific GCC and Clang versions are needed,
but by now, those pointers to versions, such later than 4.0, later than
4.4, or clang later than 5.0, are obsolete and unlikely to be found by
users configuring their kernel builds anyway.

Drop these outdated remarks in Kconfig help texts referring to older
compiler and binutils versions.  No functional change.

Link: https://lkml.kernel.org/r/20251010082138.185752-1-lukas.bulwahn@redhat.com
Signed-off-by: Lukas Bulwahn <lukas.bulwahn@redhat.com>
Cc: Bill Wendling <morbo@google.com>
Cc: Justin Stitt <justinstitt@google.com>
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: Russel King <linux@armlinux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Lukas Bulwahn 2025-10-10 10:21:38 +02:00 committed by Andrew Morton
parent 02582ac3b7
commit cd4eaccc00
3 changed files with 9 additions and 15 deletions
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19
arch/Kconfig
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@ -232,17 +232,14 @@ config HAVE_EFFICIENT_UNALIGNED_ACCESS
config ARCH_USE_BUILTIN_BSWAP config ARCH_USE_BUILTIN_BSWAP
bool bool
help help
Modern versions of GCC (since 4.4) have builtin functions GCC and Clang have builtin functions for handling byte-swapping.
for handling byte-swapping. Using these, instead of the old Using these allows the compiler to see what's happening and
inline assembler that the architecture code provides in the offers more opportunity for optimisation. In particular, the
__arch_bswapXX() macros, allows the compiler to see what's compiler will be able to combine the byteswap with a nearby load
happening and offers more opportunity for optimisation. In or store and use load-and-swap or store-and-swap instructions if
particular, the compiler will be able to combine the byteswap the architecture has them. It should almost *never* result in code
with a nearby load or store and use load-and-swap or which is worse than the hand-coded assembler in <asm/swab.h>.
store-and-swap instructions if the architecture has them. It But just in case it does, the use of the builtins is optional.
should almost *never* result in code which is worse than the
hand-coded assembler in <asm/swab.h>. But just in case it
does, the use of the builtins is optional.
Any architecture with load-and-swap or store-and-swap Any architecture with load-and-swap or store-and-swap
instructions should set this. And it shouldn't hurt to set it instructions should set this. And it shouldn't hurt to set it

2
arch/arm/Kconfig
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@ -1161,8 +1161,6 @@ config AEABI
disambiguate both ABIs and allow for backward compatibility support disambiguate both ABIs and allow for backward compatibility support
(selected with CONFIG_OABI_COMPAT). (selected with CONFIG_OABI_COMPAT).
To use this you need GCC version 4.0.0 or later.
config OABI_COMPAT config OABI_COMPAT
bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)" bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
depends on AEABI && !THUMB2_KERNEL depends on AEABI && !THUMB2_KERNEL

3
lib/Kconfig.debug
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@ -332,8 +332,7 @@ config DEBUG_INFO_COMPRESSED_ZLIB
depends on $(cc-option,-gz=zlib) depends on $(cc-option,-gz=zlib)
depends on $(ld-option,--compress-debug-sections=zlib) depends on $(ld-option,--compress-debug-sections=zlib)
help help
Compress the debug information using zlib. Requires GCC 5.0+ or Clang Compress the debug information using zlib.
5.0+, binutils 2.26+, and zlib.
Users of dpkg-deb via debian/rules may find an increase in Users of dpkg-deb via debian/rules may find an increase in
size of their debug .deb packages with this config set, due to the size of their debug .deb packages with this config set, due to the