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| author |  Mark Rutland <mark.rutland@arm.com>
| 2023-06-05 08:01:01 +0100 |
|---|---|---|
| committer |  Peter Zijlstra <peterz@infradead.org>
| 2023-06-05 09:57:14 +0200 |
| commit | d12157efc8e083c77d054675fcdd594f54cc7e2b (patch) | |
| tree | 9be23f46b4b8db9d3e36a8b551d8961d8d41822d /arch/openrisc/include | |
| parent | locking/atomic: hexagon: remove redundant arch_atomic_cmpxchg (diff) | |
| download | linux-d12157efc8e083c77d054675fcdd594f54cc7e2b.tar.gz linux-d12157efc8e083c77d054675fcdd594f54cc7e2b.tar.bz2 linux-d12157efc8e083c77d054675fcdd594f54cc7e2b.zip | |
locking/atomic: make atomic*_{cmp,}xchg optional
Most architectures define the atomic/atomic64 xchg and cmpxchg
operations in terms of arch_xchg and arch_cmpxchg respectfully.
Add fallbacks for these cases and remove the trivial cases from arch
code. On some architectures the existing definitions are kept as these
are used to build other arch_atomic*() operations.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20230605070124.3741859-5-mark.rutland@arm.com
Diffstat (limited to 'arch/openrisc/include')
| -rw-r--r-- | arch/openrisc/include/asm/atomic.h | 3 |
1 files changed, 0 insertions, 3 deletions
diff --git a/arch/openrisc/include/asm/atomic.h b/arch/openrisc/include/asm/atomic.h index 326167e4783a..8ce67ec7c9a3 100644 --- a/arch/openrisc/include/asm/atomic.h +++ b/arch/openrisc/include/asm/atomic.h @@ -130,7 +130,4 @@ static inline int arch_atomic_fetch_add_unless(atomic_t *v, int a, int u) #include <asm/cmpxchg.h> -#define arch_atomic_xchg(ptr, v) (arch_xchg(&(ptr)->counter, (v))) -#define arch_atomic_cmpxchg(v, old, new) (arch_cmpxchg(&((v)->counter), (old), (new))) - #endif /* __ASM_OPENRISC_ATOMIC_H */ |