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locking/atomic: Add generic try_cmpxchg{,64}_local() support

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Add generic support for try_cmpxchg{,64}_local() and their falbacks.

These provides the generic try_cmpxchg_local family of functions
from the arch_ prefixed version, also adding explicit instrumentation.

Signed-off-by: Uros Bizjak <ubizjak@gmail.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Link: https://lore.kernel.org/r/20230405141710.3551-2-ubizjak@gmail.com
Cc: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Uros Bizjak
2023-04-05 16:17:06 +02:00
committed by Ingo Molnar
parent 286deb7ec0
commit e6ce9d7411
4 changed files with 47 additions and 3 deletions
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20
include/linux/atomic/atomic-instrumented.h
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@@ -2132,6 +2132,24 @@ atomic_long_dec_if_positive(atomic_long_t *v)
arch_sync_cmpxchg(__ai_ptr, __VA_ARGS__); \
})
#define try_cmpxchg_local(ptr, oldp, ...) \
({ \
typeof(ptr) __ai_ptr = (ptr); \
typeof(oldp) __ai_oldp = (oldp); \
instrument_atomic_write(__ai_ptr, sizeof(*__ai_ptr)); \
instrument_atomic_write(__ai_oldp, sizeof(*__ai_oldp)); \
arch_try_cmpxchg_local(__ai_ptr, __ai_oldp, __VA_ARGS__); \
})
#define try_cmpxchg64_local(ptr, oldp, ...) \
({ \
typeof(ptr) __ai_ptr = (ptr); \
typeof(oldp) __ai_oldp = (oldp); \
instrument_atomic_write(__ai_ptr, sizeof(*__ai_ptr)); \
instrument_atomic_write(__ai_oldp, sizeof(*__ai_oldp)); \
arch_try_cmpxchg64_local(__ai_ptr, __ai_oldp, __VA_ARGS__); \
})
#define cmpxchg_double(ptr, ...) \
({ \
typeof(ptr) __ai_ptr = (ptr); \
@@ -2149,4 +2167,4 @@ atomic_long_dec_if_positive(atomic_long_t *v)
})
#endif /* _LINUX_ATOMIC_INSTRUMENTED_H */
// 1b485de9cbaa4900de59e14ee2084357eaeb1c3a
// 97fe4d79aa058d2164df824632cbc4f716d2a407