diff options
| author | Will Deacon <will.deacon@arm.com> | 2015-05-29 20:28:44 +0300 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2015-07-27 13:08:40 +0300 |
| commit | 4b3dc9679cf779339d9049800803dfc3c83433d1 (patch) | |
| tree | 8c04c26a614240f3142b7afafc071719fc3ea0f5 /arch/arm64/include/asm/barrier.h | |
| parent | 52da443ec4d0a807b720527eb474f9c2878cd671 (diff) | |
| download | linux-4b3dc9679cf779339d9049800803dfc3c83433d1.tar.xz | |
arm64: force CONFIG_SMP=y and remove redundant #ifdefs
Nobody seems to be producing !SMP systems anymore, so this is just
becoming a source of kernel bugs, particularly if people want to use
coherent DMA with non-shared pages.
This patch forces CONFIG_SMP=y for arm64, removing a modest amount of
code in the process.
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'arch/arm64/include/asm/barrier.h')
| -rw-r--r-- | arch/arm64/include/asm/barrier.h | 24 |
1 files changed, 0 insertions, 24 deletions
diff --git a/arch/arm64/include/asm/barrier.h b/arch/arm64/include/asm/barrier.h index 0fa47c4275cb..624f9679f4b0 100644 --- a/arch/arm64/include/asm/barrier.h +++ b/arch/arm64/include/asm/barrier.h @@ -35,28 +35,6 @@ #define dma_rmb() dmb(oshld) #define dma_wmb() dmb(oshst) -#ifndef CONFIG_SMP -#define smp_mb() barrier() -#define smp_rmb() barrier() -#define smp_wmb() barrier() - -#define smp_store_release(p, v) \ -do { \ - compiletime_assert_atomic_type(*p); \ - barrier(); \ - ACCESS_ONCE(*p) = (v); \ -} while (0) - -#define smp_load_acquire(p) \ -({ \ - typeof(*p) ___p1 = ACCESS_ONCE(*p); \ - compiletime_assert_atomic_type(*p); \ - barrier(); \ - ___p1; \ -}) - -#else - #define smp_mb() dmb(ish) #define smp_rmb() dmb(ishld) #define smp_wmb() dmb(ishst) @@ -109,8 +87,6 @@ do { \ ___p1; \ }) -#endif - #define read_barrier_depends() do { } while(0) #define smp_read_barrier_depends() do { } while(0) |