diff options
| 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/powerpc | |
| parent | a7bafa7969da1c0e9c342c792d8224078d1c491c (diff) | |
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/powerpc')
| -rw-r--r-- | arch/powerpc/include/asm/atomic.h | 24 |
1 files changed, 0 insertions, 24 deletions
diff --git a/arch/powerpc/include/asm/atomic.h b/arch/powerpc/include/asm/atomic.h index 47228b177478..5bf6a4d49268 100644 --- a/arch/powerpc/include/asm/atomic.h +++ b/arch/powerpc/include/asm/atomic.h @@ -126,18 +126,6 @@ ATOMIC_OPS(xor, xor, "", K) #undef ATOMIC_OP_RETURN_RELAXED #undef ATOMIC_OP -#define arch_atomic_cmpxchg(v, o, n) \ - (arch_cmpxchg(&((v)->counter), (o), (n))) -#define arch_atomic_cmpxchg_relaxed(v, o, n) \ - arch_cmpxchg_relaxed(&((v)->counter), (o), (n)) -#define arch_atomic_cmpxchg_acquire(v, o, n) \ - arch_cmpxchg_acquire(&((v)->counter), (o), (n)) - -#define arch_atomic_xchg(v, new) \ - (arch_xchg(&((v)->counter), new)) -#define arch_atomic_xchg_relaxed(v, new) \ - arch_xchg_relaxed(&((v)->counter), (new)) - /** * atomic_fetch_add_unless - add unless the number is a given value * @v: pointer of type atomic_t @@ -396,18 +384,6 @@ static __inline__ s64 arch_atomic64_dec_if_positive(atomic64_t *v) } #define arch_atomic64_dec_if_positive arch_atomic64_dec_if_positive -#define arch_atomic64_cmpxchg(v, o, n) \ - (arch_cmpxchg(&((v)->counter), (o), (n))) -#define arch_atomic64_cmpxchg_relaxed(v, o, n) \ - arch_cmpxchg_relaxed(&((v)->counter), (o), (n)) -#define arch_atomic64_cmpxchg_acquire(v, o, n) \ - arch_cmpxchg_acquire(&((v)->counter), (o), (n)) - -#define arch_atomic64_xchg(v, new) \ - (arch_xchg(&((v)->counter), new)) -#define arch_atomic64_xchg_relaxed(v, new) \ - arch_xchg_relaxed(&((v)->counter), (new)) - /** * atomic64_fetch_add_unless - add unless the number is a given value * @v: pointer of type atomic64_t |