Unverified Commit 8b699616 authored Dec 01, 2018 by Andrea Parri Committed by Palmer Dabbelt Dec 21, 2018

riscv, atomic: Add #define's for the atomic_{cmp,}xchg_*() variants



If an architecture does not define the atomic_{cmp,}xchg_*() variants,
the generic implementation defaults them to the fully-ordered version.

riscv's had its own variants since "the beginning", but it never told
(#define-d these for) the generic implementation: it is time to do so.

Signed-off-by: Andrea Parri <andrea.parri@amarulasolutions.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>

parent 7566ec39

arch/riscv/include/asm/atomic.h

+9 −0

Original line number	Diff line number	Diff line
		@@ -303,6 +303,15 @@ c_t atomic##prefix##_cmpxchg(atomic##prefix##_t *v, c_t o, c_t n) \

		ATOMIC_OPS()

		#define atomic_xchg_relaxed atomic_xchg_relaxed
		#define atomic_xchg_acquire atomic_xchg_acquire
		#define atomic_xchg_release atomic_xchg_release
		#define atomic_xchg atomic_xchg
		#define atomic_cmpxchg_relaxed atomic_cmpxchg_relaxed
		#define atomic_cmpxchg_acquire atomic_cmpxchg_acquire
		#define atomic_cmpxchg_release atomic_cmpxchg_release
		#define atomic_cmpxchg atomic_cmpxchg

		#undef ATOMIC_OPS
		#undef ATOMIC_OP

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