Commit 07bf3dcb authored by Mark Rutland's avatar Mark Rutland Committed by Peter Zijlstra
Browse files

locking/atomic: parisc: 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/parisc.

Signed-off-by: default avatarMark Rutland <mark.rutland@arm.com>
Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: default avatarKees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20230605070124.3741859-10-mark.rutland@arm.com
parent e50f06ce

arch/parisc/include/asm/atomic.h

+18 −0
Original line number Diff line number Diff line
@@ -118,6 +118,11 @@ 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, c_op)						\

	ATOMIC_OP(op, c_op)						\
@@ -127,6 +132,10 @@ 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
@@ -181,6 +190,11 @@ static __inline__ s64 arch_atomic64_fetch_##op(s64 i, atomic64_t *v) \ 
ATOMIC64_OPS(add, +=)

ATOMIC64_OPS(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 ATOMIC64_OPS

#define ATOMIC64_OPS(op, c_op)						\

	ATOMIC64_OP(op, c_op)						\
@@ -190,6 +204,10 @@ ATOMIC64_OPS(and, &=) 
ATOMIC64_OPS(or, |=)

ATOMIC64_OPS(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 ATOMIC64_OPS

#undef ATOMIC64_FETCH_OP

#undef ATOMIC64_OP_RETURN