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authorGuo Ren <guoren@linux.alibaba.com>2021-05-04 14:08:44 +0800
committerGuo Ren <guoren@linux.alibaba.com>2021-07-04 17:39:54 +0800
commit6ea42c84f33368eb3fe1ec1bff8d7cb1a5c7b07a (patch)
tree8c651b03bd589f0f33c9060c03269b792d740c4f /arch/csky/mm
parent13311e74253fe64329390df80bed3f07314ddd61 (diff)
csky: syscache: Fixup duplicate cache flush
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>
Diffstat (limited to 'arch/csky/mm')
-rw-r--r--arch/csky/mm/syscache.c12
1 files changed, 7 insertions, 5 deletions
diff --git a/arch/csky/mm/syscache.c b/arch/csky/mm/syscache.c
index 4e51d63850c4..cd847ad62c7e 100644
--- a/arch/csky/mm/syscache.c
+++ b/arch/csky/mm/syscache.c
@@ -12,15 +12,17 @@ SYSCALL_DEFINE3(cacheflush,
int, cache)
{
switch (cache) {
- case ICACHE:
case BCACHE:
- flush_icache_mm_range(current->mm,
- (unsigned long)addr,
- (unsigned long)addr + bytes);
- fallthrough;
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;