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locking/atomic: sparc: add preprocessor symbols

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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/sparc.

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/20230605070124.3741859-12-mark.rutland@arm.com
This commit is contained in:
Mark Rutland 2023-06-05 08:01:08 +01:00 committed by Peter Zijlstra
parent 770345adc3
commit 358c449afa
2 changed files with 32 additions and 2 deletions
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16
arch/sparc/include/asm/atomic_32.h
View file

@ -19,19 +19,31 @@
#include <asm-generic/atomic64.h>
int arch_atomic_add_return(int, atomic_t *);
#define arch_atomic_add_return arch_atomic_add_return
int arch_atomic_fetch_add(int, atomic_t *);
#define arch_atomic_fetch_add arch_atomic_fetch_add
int arch_atomic_fetch_and(int, atomic_t *);
#define arch_atomic_fetch_and arch_atomic_fetch_and
int arch_atomic_fetch_or(int, atomic_t *);
#define arch_atomic_fetch_or arch_atomic_fetch_or
int arch_atomic_fetch_xor(int, atomic_t *);
#define arch_atomic_fetch_xor arch_atomic_fetch_xor
int arch_atomic_cmpxchg(atomic_t *, int, int);
#define arch_atomic_cmpxchg arch_atomic_cmpxchg
int arch_atomic_xchg(atomic_t *, int);
#define arch_atomic_xchg arch_atomic_xchg
int arch_atomic_fetch_add_unless(atomic_t *, int, int);
void arch_atomic_set(atomic_t *, int);
int arch_atomic_fetch_add_unless(atomic_t *, int, int);
#define arch_atomic_fetch_add_unless arch_atomic_fetch_add_unless
void arch_atomic_set(atomic_t *, int);
#define arch_atomic_set_release(v, i) arch_atomic_set((v), (i))
#define arch_atomic_read(v) READ_ONCE((v)->counter)

18
arch/sparc/include/asm/atomic_64.h
View file

@ -37,6 +37,16 @@ s64 arch_atomic64_fetch_##op(s64, atomic64_t *);
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
#define arch_atomic64_add_return arch_atomic64_add_return
#define arch_atomic64_sub_return arch_atomic64_sub_return
#define arch_atomic64_fetch_add arch_atomic64_fetch_add
#define arch_atomic64_fetch_sub arch_atomic64_fetch_sub
#undef ATOMIC_OPS
#define ATOMIC_OPS(op) ATOMIC_OP(op) ATOMIC_FETCH_OP(op)
@ -44,6 +54,14 @@ 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
#define arch_atomic64_fetch_and arch_atomic64_fetch_and
#define arch_atomic64_fetch_or arch_atomic64_fetch_or
#define arch_atomic64_fetch_xor arch_atomic64_fetch_xor
#undef ATOMIC_OPS
#undef ATOMIC_FETCH_OP
#undef ATOMIC_OP_RETURN