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| author | Michael S. Tsirkin <mst@redhat.com> | 2015-12-27 16:04:42 +0300 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2016-01-12 21:46:53 +0300 |
| commit | 003472a93ad019bfd054a5cbb30c6eec7d0395a3 (patch) | |
| tree | c9b52f3bba3d9381b8dff3245819f638a0fcf05b /arch/powerpc/include/asm/barrier.h | |
| parent | a9e4252a9b147043142282ebb65da94dcb951e2a (diff) | |
| download | linux-003472a93ad019bfd054a5cbb30c6eec7d0395a3.tar.xz | |
powerpc: define __smp_xxx
This defines __smp_xxx barriers for powerpc
for use by virtualization.
smp_xxx barriers are removed as they are
defined correctly by asm-generic/barriers.h
This reduces the amount of arch-specific boiler-plate code.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Boqun Feng <boqun.feng@gmail.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Diffstat (limited to 'arch/powerpc/include/asm/barrier.h')
| -rw-r--r-- | arch/powerpc/include/asm/barrier.h | 24 |
1 files changed, 8 insertions, 16 deletions
diff --git a/arch/powerpc/include/asm/barrier.h b/arch/powerpc/include/asm/barrier.h index 980ad0cbdccf..c0deafc212b8 100644 --- a/arch/powerpc/include/asm/barrier.h +++ b/arch/powerpc/include/asm/barrier.h @@ -44,19 +44,11 @@ #define dma_rmb() __lwsync() #define dma_wmb() __asm__ __volatile__ (stringify_in_c(SMPWMB) : : :"memory") -#ifdef CONFIG_SMP -#define smp_lwsync() __lwsync() +#define __smp_lwsync() __lwsync() -#define smp_mb() mb() -#define smp_rmb() __lwsync() -#define smp_wmb() __asm__ __volatile__ (stringify_in_c(SMPWMB) : : :"memory") -#else -#define smp_lwsync() barrier() - -#define smp_mb() barrier() -#define smp_rmb() barrier() -#define smp_wmb() barrier() -#endif /* CONFIG_SMP */ +#define __smp_mb() mb() +#define __smp_rmb() __lwsync() +#define __smp_wmb() __asm__ __volatile__ (stringify_in_c(SMPWMB) : : :"memory") /* * This is a barrier which prevents following instructions from being @@ -67,18 +59,18 @@ #define data_barrier(x) \ asm volatile("twi 0,%0,0; isync" : : "r" (x) : "memory"); -#define smp_store_release(p, v) \ +#define __smp_store_release(p, v) \ do { \ compiletime_assert_atomic_type(*p); \ - smp_lwsync(); \ + __smp_lwsync(); \ WRITE_ONCE(*p, v); \ } while (0) -#define smp_load_acquire(p) \ +#define __smp_load_acquire(p) \ ({ \ typeof(*p) ___p1 = READ_ONCE(*p); \ compiletime_assert_atomic_type(*p); \ - smp_lwsync(); \ + __smp_lwsync(); \ ___p1; \ }) |