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locking/atomic/x86: Use 's64 *' for 'old' argument of atomic64_try_cmpxchg()

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atomic64_try_cmpxchg() declares old argument as 'long *',
this makes it impossible to use it in portable code.
If caller passes 'long *', it becomes 32-bits on 32-bit arches.
If caller passes 's64 *', it does not compile on x86_64.

Change type of old argument to 's64 *' instead.

Signed-off-by: Dmitry Vyukov <dvyukov@google.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will.deacon@arm.com>
Cc: kasan-dev@googlegroups.com
Cc: linux-mm@kvack.org
Link: http://lkml.kernel.org/r/fa6f77f2375150d26ea796a77e8b59195fd2ab13.1497690003.git.dvyukov@google.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Dmitry Vyukov 2017-06-17 11:15:28 +02:00 committed by Ingo Molnar
parent ba1c9f83f6
commit 007d185b44
2 changed files with 7 additions and 7 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

12
arch/x86/include/asm/atomic64_64.h
View file

@ -177,7 +177,7 @@ static inline long atomic64_cmpxchg(atomic64_t *v, long old, long new)
}
#define atomic64_try_cmpxchg atomic64_try_cmpxchg
static __always_inline bool atomic64_try_cmpxchg(atomic64_t *v, long *old, long new)
static __always_inline bool atomic64_try_cmpxchg(atomic64_t *v, s64 *old, long new)
{
return try_cmpxchg(&v->counter, old, new);
}
@ -198,7 +198,7 @@ static inline long atomic64_xchg(atomic64_t *v, long new)
*/
static inline bool atomic64_add_unless(atomic64_t *v, long a, long u)
{
long c = atomic64_read(v);
s64 c = atomic64_read(v);
do {
if (unlikely(c == u))
return false;
@ -217,7 +217,7 @@ static inline bool atomic64_add_unless(atomic64_t *v, long a, long u)
*/
static inline long atomic64_dec_if_positive(atomic64_t *v)
{
long dec, c = atomic64_read(v);
s64 dec, c = atomic64_read(v);
do {
dec = c - 1;
if (unlikely(dec < 0))
@ -236,7 +236,7 @@ static inline void atomic64_and(long i, atomic64_t *v)
static inline long atomic64_fetch_and(long i, atomic64_t *v)
{
long val = atomic64_read(v);
s64 val = atomic64_read(v);
do {
} while (!atomic64_try_cmpxchg(v, &val, val & i));
@ -253,7 +253,7 @@ static inline void atomic64_or(long i, atomic64_t *v)
static inline long atomic64_fetch_or(long i, atomic64_t *v)
{
long val = atomic64_read(v);
s64 val = atomic64_read(v);
do {
} while (!atomic64_try_cmpxchg(v, &val, val | i));
@ -270,7 +270,7 @@ static inline void atomic64_xor(long i, atomic64_t *v)
static inline long atomic64_fetch_xor(long i, atomic64_t *v)
{
long val = atomic64_read(v);
s64 val = atomic64_read(v);
do {
} while (!atomic64_try_cmpxchg(v, &val, val ^ i));

2
arch/x86/include/asm/cmpxchg.h
View file

@ -157,7 +157,7 @@ extern void __add_wrong_size(void)
#define __raw_try_cmpxchg(_ptr, _pold, _new, size, lock) \
({ \
bool success; \
__typeof__(_ptr) _old = (_pold); \
__typeof__(_ptr) _old = (__typeof__(_ptr))(_pold); \
__typeof__(*(_ptr)) __old = *_old; \
__typeof__(*(_ptr)) __new = (_new); \
switch (size) { \