mirror of https://gitee.com/openkylin/linux.git
arm64: percpu: kill off final ACCESS_ONCE() uses
For several reasons it is preferable to use {READ,WRITE}_ONCE() rather than ACCESS_ONCE(). For example, these handle aggregate types, result in shorter source code, and better document the intended access (which may be useful for instrumentation features such as the upcoming KTSAN). Over a number of patches, most uses of ACCESS_ONCE() in arch/arm64 have been migrated to {READ,WRITE}_ONCE(). For consistency, and the above reasons, this patch migrates the final remaining uses. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Cc: Will Deacon <will.deacon@arm.com> Acked-by: Dmitry Vyukov <dvyukov@google.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
parent
0c2f0afe35
commit
094339443e
|
@ -101,16 +101,16 @@ static inline unsigned long __percpu_read(void *ptr, int size)
|
|||
|
||||
switch (size) {
|
||||
case 1:
|
||||
ret = ACCESS_ONCE(*(u8 *)ptr);
|
||||
ret = READ_ONCE(*(u8 *)ptr);
|
||||
break;
|
||||
case 2:
|
||||
ret = ACCESS_ONCE(*(u16 *)ptr);
|
||||
ret = READ_ONCE(*(u16 *)ptr);
|
||||
break;
|
||||
case 4:
|
||||
ret = ACCESS_ONCE(*(u32 *)ptr);
|
||||
ret = READ_ONCE(*(u32 *)ptr);
|
||||
break;
|
||||
case 8:
|
||||
ret = ACCESS_ONCE(*(u64 *)ptr);
|
||||
ret = READ_ONCE(*(u64 *)ptr);
|
||||
break;
|
||||
default:
|
||||
BUILD_BUG();
|
||||
|
@ -123,16 +123,16 @@ static inline void __percpu_write(void *ptr, unsigned long val, int size)
|
|||
{
|
||||
switch (size) {
|
||||
case 1:
|
||||
ACCESS_ONCE(*(u8 *)ptr) = (u8)val;
|
||||
WRITE_ONCE(*(u8 *)ptr, (u8)val);
|
||||
break;
|
||||
case 2:
|
||||
ACCESS_ONCE(*(u16 *)ptr) = (u16)val;
|
||||
WRITE_ONCE(*(u16 *)ptr, (u16)val);
|
||||
break;
|
||||
case 4:
|
||||
ACCESS_ONCE(*(u32 *)ptr) = (u32)val;
|
||||
WRITE_ONCE(*(u32 *)ptr, (u32)val);
|
||||
break;
|
||||
case 8:
|
||||
ACCESS_ONCE(*(u64 *)ptr) = (u64)val;
|
||||
WRITE_ONCE(*(u64 *)ptr, (u64)val);
|
||||
break;
|
||||
default:
|
||||
BUILD_BUG();
|
||||
|
|
Loading…
Reference in New Issue