diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2023-05-05 12:56:55 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2023-05-05 12:56:55 -0700 |
| commit | b115d85a9584c98f9a7dec209d835462aa1adc09 (patch) | |
| tree | 332af6e2fafef47b9dc9891282b422eb5dcc5f3f /arch/sparc/include | |
| parent | d5ed10bb80bb376501cb56015a47457647efaabf (diff) | |
| parent | ec570320b09f76d52819e60abdccf372658216b6 (diff) | |
Merge tag 'locking-core-2023-05-05' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull locking updates from Ingo Molnar:
- Introduce local{,64}_try_cmpxchg() - a slightly more optimal
primitive, which will be used in perf events ring-buffer code
- Simplify/modify rwsems on PREEMPT_RT, to address writer starvation
- Misc cleanups/fixes
* tag 'locking-core-2023-05-05' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
locking/atomic: Correct (cmp)xchg() instrumentation
locking/x86: Define arch_try_cmpxchg_local()
locking/arch: Wire up local_try_cmpxchg()
locking/generic: Wire up local{,64}_try_cmpxchg()
locking/atomic: Add generic try_cmpxchg{,64}_local() support
locking/rwbase: Mitigate indefinite writer starvation
locking/arch: Rename all internal __xchg() names to __arch_xchg()
Diffstat (limited to 'arch/sparc/include')
| -rw-r--r-- | arch/sparc/include/asm/cmpxchg_32.h | 4 | ||||
| -rw-r--r-- | arch/sparc/include/asm/cmpxchg_64.h | 6 |
2 files changed, 5 insertions, 5 deletions
diff --git a/arch/sparc/include/asm/cmpxchg_32.h b/arch/sparc/include/asm/cmpxchg_32.h index 27a57a3a7597..7a1339533d1d 100644 --- a/arch/sparc/include/asm/cmpxchg_32.h +++ b/arch/sparc/include/asm/cmpxchg_32.h @@ -15,7 +15,7 @@ unsigned long __xchg_u32(volatile u32 *m, u32 new); void __xchg_called_with_bad_pointer(void); -static inline unsigned long __xchg(unsigned long x, __volatile__ void * ptr, int size) +static inline unsigned long __arch_xchg(unsigned long x, __volatile__ void * ptr, int size) { switch (size) { case 4: @@ -25,7 +25,7 @@ static inline unsigned long __xchg(unsigned long x, __volatile__ void * ptr, int return x; } -#define arch_xchg(ptr,x) ({(__typeof__(*(ptr)))__xchg((unsigned long)(x),(ptr),sizeof(*(ptr)));}) +#define arch_xchg(ptr,x) ({(__typeof__(*(ptr)))__arch_xchg((unsigned long)(x),(ptr),sizeof(*(ptr)));}) /* Emulate cmpxchg() the same way we emulate atomics, * by hashing the object address and indexing into an array diff --git a/arch/sparc/include/asm/cmpxchg_64.h b/arch/sparc/include/asm/cmpxchg_64.h index 12d00a42c0a3..66cd61dde9ec 100644 --- a/arch/sparc/include/asm/cmpxchg_64.h +++ b/arch/sparc/include/asm/cmpxchg_64.h @@ -55,7 +55,7 @@ static inline unsigned long xchg64(__volatile__ unsigned long *m, unsigned long #define arch_xchg(ptr,x) \ ({ __typeof__(*(ptr)) __ret; \ __ret = (__typeof__(*(ptr))) \ - __xchg((unsigned long)(x), (ptr), sizeof(*(ptr))); \ + __arch_xchg((unsigned long)(x), (ptr), sizeof(*(ptr))); \ __ret; \ }) @@ -87,8 +87,8 @@ xchg16(__volatile__ unsigned short *m, unsigned short val) return (load32 & mask) >> bit_shift; } -static inline unsigned long __xchg(unsigned long x, __volatile__ void * ptr, - int size) +static inline unsigned long +__arch_xchg(unsigned long x, __volatile__ void * ptr, int size) { switch (size) { case 2: |