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s390/atomic: Provide arch_atomic_try_cmpxchg()

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Since gcc 14 flag output operands are supported also for s390.

Provide an arch_atomic try_cmpxchg() implementation so that all
existing atomic_try_cmpxchg() usages generate slightly better code,
if compiled with gcc 14 or newer.

Reviewed-by: Juergen Christ <jchrist@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
This commit is contained in:
Heiko Carstens 2024-11-06 11:03:13 +01:00
parent f99d670e31
commit 5ba865ad57
1 changed files with 12 additions and 0 deletions
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12
arch/s390/include/asm/atomic.h
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@ -84,6 +84,12 @@ static __always_inline int arch_atomic_cmpxchg(atomic_t *v, int old, int new)
}
#define arch_atomic_cmpxchg arch_atomic_cmpxchg
static __always_inline bool arch_atomic_try_cmpxchg(atomic_t *v, int *old, int new)
{
return arch_try_cmpxchg(&v->counter, old, new);
}
#define arch_atomic_try_cmpxchg arch_atomic_try_cmpxchg
#define ATOMIC64_INIT(i) { (i) }
static __always_inline s64 arch_atomic64_read(const atomic64_t *v)
@ -128,6 +134,12 @@ static __always_inline s64 arch_atomic64_cmpxchg(atomic64_t *v, s64 old, s64 new
}
#define arch_atomic64_cmpxchg arch_atomic64_cmpxchg
static __always_inline bool arch_atomic64_try_cmpxchg(atomic64_t *v, s64 *old, s64 new)
{
return arch_try_cmpxchg(&v->counter, old, new);
}
#define arch_atomic64_try_cmpxchg arch_atomic64_try_cmpxchg
#define ATOMIC64_OPS(op) \
static __always_inline void arch_atomic64_##op(s64 i, atomic64_t *v) \
{ \