From: Mark Rutland Date: Mon, 5 Jun 2023 07:01:02 +0000 (+0100) Subject: locking/atomic: arc: add preprocessor symbols X-Git-Tag: v6.5-rc1~197^2~24 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f739287ef57bc01155e556033462e9a6ff020c97;p=thirdparty%2Flinux.git locking/atomic: arc: 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/arc. Signed-off-by: Mark Rutland Signed-off-by: Peter Zijlstra (Intel) Reviewed-by: Kees Cook Link: https://lore.kernel.org/r/20230605070124.3741859-6-mark.rutland@arm.com --- diff --git a/arch/arc/include/asm/atomic-spinlock.h b/arch/arc/include/asm/atomic-spinlock.h index 2c830347bfb4e..89d12a60f84c0 100644 --- a/arch/arc/include/asm/atomic-spinlock.h +++ b/arch/arc/include/asm/atomic-spinlock.h @@ -81,6 +81,11 @@ static inline int arch_atomic_fetch_##op(int i, atomic_t *v) \ ATOMIC_OPS(add, +=, add) ATOMIC_OPS(sub, -=, sub) +#define arch_atomic_fetch_add arch_atomic_fetch_add +#define arch_atomic_fetch_sub arch_atomic_fetch_sub +#define arch_atomic_add_return arch_atomic_add_return +#define arch_atomic_sub_return arch_atomic_sub_return + #undef ATOMIC_OPS #define ATOMIC_OPS(op, c_op, asm_op) \ ATOMIC_OP(op, c_op, asm_op) \ @@ -92,7 +97,11 @@ ATOMIC_OPS(or, |=, or) ATOMIC_OPS(xor, ^=, xor) #define arch_atomic_andnot arch_atomic_andnot + +#define arch_atomic_fetch_and arch_atomic_fetch_and #define arch_atomic_fetch_andnot arch_atomic_fetch_andnot +#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