mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2026-01-17 20:10:49 +00:00
6ea42c84f3
The current csky logic of sys_cacheflush is wrong, it'll cause
icache flush call dcache flush again. Now fixup it with a
conditional "break & fallthrough".
Fixes: 997153b9a75c ("csky: Add flush_icache_mm to defer flush icache all")
Fixes: 0679d29d3e23 ("csky: fix syscache.c fallthrough warning")
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Co-Developed-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
Cc: Arnd Bergmann <arnd@arndb.de>
33 lines
623 B
C
33 lines
623 B
C
// SPDX-License-Identifier: GPL-2.0
|
|
// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
|
|
|
|
#include <linux/syscalls.h>
|
|
#include <asm/page.h>
|
|
#include <asm/cacheflush.h>
|
|
#include <asm/cachectl.h>
|
|
|
|
SYSCALL_DEFINE3(cacheflush,
|
|
void __user *, addr,
|
|
unsigned long, bytes,
|
|
int, cache)
|
|
{
|
|
switch (cache) {
|
|
case BCACHE:
|
|
case DCACHE:
|
|
dcache_wb_range((unsigned long)addr,
|
|
(unsigned long)addr + bytes);
|
|
if (cache != BCACHE)
|
|
break;
|
|
fallthrough;
|
|
case ICACHE:
|
|
flush_icache_mm_range(current->mm,
|
|
(unsigned long)addr,
|
|
(unsigned long)addr + bytes);
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|