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| author | Mark Rutland <mark.rutland@arm.com> | 2023-06-05 08:01:10 +0100 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2023-06-05 09:57:18 +0200 |
| commit | 7c7084f3ba4031a9c2858afed696a577fcfe41d2 (patch) | |
| tree | d6b4070796a62ab554b54a584755e6e69223910e /arch/xtensa | |
| parent | 5bef003538ae8621c95ac6ebfd37324373fae37d (diff) | |
| download | linux-stable-7c7084f3ba4031a9c2858afed696a577fcfe41d2.tar.gz linux-stable-7c7084f3ba4031a9c2858afed696a577fcfe41d2.tar.bz2 linux-stable-7c7084f3ba4031a9c2858afed696a577fcfe41d2.zip | |
locking/atomic: xtensa: add preprocessor symbols
Some atomics can be implemented in several different ways, e.g.
FULL/ACQUIRE/RELEASE ordered atomics can be implemented in terms of
RELAXED atomics, and ACQUIRE/RELEASE/RELAXED can be implemented in terms
of FULL ordered atomics. Other atomics are optional, and don't exist in
some configurations (e.g. not all architectures implement the 128-bit
cmpxchg ops).
Subsequent patches will require that architectures define a preprocessor
symbol for any atomic (or ordering variant) which is optional. This will
make the fallback ifdeffery more robust, and simplify future changes.
Add the required definitions to arch/xtensa.
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/20230605070124.3741859-14-mark.rutland@arm.com
Diffstat (limited to 'arch/xtensa')
| -rw-r--r-- | arch/xtensa/include/asm/atomic.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/xtensa/include/asm/atomic.h b/arch/xtensa/include/asm/atomic.h index 1d323a864002..7308b7f777d7 100644 --- a/arch/xtensa/include/asm/atomic.h +++ b/arch/xtensa/include/asm/atomic.h @@ -245,6 +245,11 @@ static inline int arch_atomic_fetch_##op(int i, atomic_t * v) \ ATOMIC_OPS(add) ATOMIC_OPS(sub) +#define arch_atomic_add_return arch_atomic_add_return +#define arch_atomic_sub_return arch_atomic_sub_return +#define arch_atomic_fetch_add arch_atomic_fetch_add +#define arch_atomic_fetch_sub arch_atomic_fetch_sub + #undef ATOMIC_OPS #define ATOMIC_OPS(op) ATOMIC_OP(op) ATOMIC_FETCH_OP(op) @@ -252,6 +257,10 @@ ATOMIC_OPS(and) ATOMIC_OPS(or) ATOMIC_OPS(xor) +#define arch_atomic_fetch_and arch_atomic_fetch_and +#define arch_atomic_fetch_or arch_atomic_fetch_or +#define arch_atomic_fetch_xor arch_atomic_fetch_xor + #undef ATOMIC_OPS #undef ATOMIC_FETCH_OP #undef ATOMIC_OP_RETURN |