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| author |   Boqun Feng <boqun.feng@gmail.com> | 2015-12-15 22:24:16 +0800 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2016-02-18 00:11:31 +1100 |
| commit | 26760fc19a7e663e4f49d586aca6740fb21d887d (patch) | |
| tree | 8c73bf998f486b3d16129566cae55049e27c764f /arch/powerpc/include/asm/atomic.h | |
| parent | powerpc: atomic: Implement atomic{, 64}_*_return_* variants (diff) | |
| download | linux-dev-26760fc19a7e663e4f49d586aca6740fb21d887d.tar.xz linux-dev-26760fc19a7e663e4f49d586aca6740fb21d887d.zip | |
powerpc: atomic: Implement acquire/release/relaxed variants for xchg
Implement xchg{,64}_relaxed and atomic{,64}_xchg_relaxed, based on these
_relaxed variants, release/acquire variants and fully ordered versions
can be built.
Note that xchg{,64}_relaxed and atomic_{,64}_xchg_relaxed are not
compiler barriers.
Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/include/asm/atomic.h')
| -rw-r--r-- | arch/powerpc/include/asm/atomic.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/atomic.h b/arch/powerpc/include/asm/atomic.h index a35c27709e05..a19fcdc318ee 100644 --- a/arch/powerpc/include/asm/atomic.h +++ b/arch/powerpc/include/asm/atomic.h @@ -177,6 +177,7 @@ static __inline__ int atomic_dec_return_relaxed(atomic_t *v) #define atomic_cmpxchg(v, o, n) (cmpxchg(&((v)->counter), (o), (n))) #define atomic_xchg(v, new) (xchg(&((v)->counter), new)) +#define atomic_xchg_relaxed(v, new) xchg_relaxed(&((v)->counter), (new)) /** * __atomic_add_unless - add unless the number is a given value @@ -444,6 +445,7 @@ static __inline__ long atomic64_dec_if_positive(atomic64_t *v) #define atomic64_cmpxchg(v, o, n) (cmpxchg(&((v)->counter), (o), (n))) #define atomic64_xchg(v, new) (xchg(&((v)->counter), new)) +#define atomic64_xchg_relaxed(v, new) xchg_relaxed(&((v)->counter), (new)) /** * atomic64_add_unless - add unless the number is a given value |