diff options
| author | Heiko Carstens <hca@linux.ibm.com> | 2024-12-04 12:30:58 +0100 |
|---|---|---|
| committer | Alexander Gordeev <agordeev@linux.ibm.com> | 2024-12-15 15:13:42 +0100 |
| commit | d809df72b5a583f9fa6e0a722e4e7cb8b28b19fc (patch) | |
| tree | ff002f38df66a89348e80e3da6c0bef395710dea | |
| parent | 7ad0075005088d931a39321dcbb5cb4df8801a37 (diff) | |
s390/atomic: Implement arch_atomic_inc() / arch_atomic_dec()
Implement arch_atomic_inc() / arch_atomic_dec() functions which result
in a single instruction if compiled for z196 or newer architectures.
Reduces the kernel image size by ~6K (defconfig):
bloat-o-meter:
add/remove: 0/0 grow/shrink: 12/1005 up/down: 106/-6404 (-6298)
Reviewed-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
| -rw-r--r-- | arch/s390/include/asm/atomic.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/arch/s390/include/asm/atomic.h b/arch/s390/include/asm/atomic.h index 6723fca64018..c1a4a06e8340 100644 --- a/arch/s390/include/asm/atomic.h +++ b/arch/s390/include/asm/atomic.h @@ -45,6 +45,18 @@ static __always_inline void arch_atomic_add(int i, atomic_t *v) } #define arch_atomic_add arch_atomic_add +static __always_inline void arch_atomic_inc(atomic_t *v) +{ + __atomic_add_const(1, &v->counter); +} +#define arch_atomic_inc arch_atomic_inc + +static __always_inline void arch_atomic_dec(atomic_t *v) +{ + __atomic_add_const(-1, &v->counter); +} +#define arch_atomic_dec arch_atomic_dec + #define arch_atomic_sub(_i, _v) arch_atomic_add(-(int)(_i), _v) #define arch_atomic_sub_return(_i, _v) arch_atomic_add_return(-(int)(_i), _v) #define arch_atomic_fetch_sub(_i, _v) arch_atomic_fetch_add(-(int)(_i), _v) @@ -122,6 +134,18 @@ static __always_inline void arch_atomic64_add(s64 i, atomic64_t *v) } #define arch_atomic64_add arch_atomic64_add +static __always_inline void arch_atomic64_inc(atomic64_t *v) +{ + __atomic64_add_const(1, (long *)&v->counter); +} +#define arch_atomic64_inc arch_atomic64_inc + +static __always_inline void arch_atomic64_dec(atomic64_t *v) +{ + __atomic64_add_const(-1, (long *)&v->counter); +} +#define arch_atomic64_dec arch_atomic64_dec + static __always_inline s64 arch_atomic64_xchg(atomic64_t *v, s64 new) { return arch_xchg(&v->counter, new); |