diff options
| -rw-r--r-- | arch/arm/include/asm/processor.h | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/arch/arm/include/asm/processor.h b/arch/arm/include/asm/processor.h index 26164c92fa30..c3d5fc124a05 100644 --- a/arch/arm/include/asm/processor.h +++ b/arch/arm/include/asm/processor.h @@ -112,12 +112,19 @@ static inline void prefetch(const void *ptr) :: "p" (ptr)); } +#if __LINUX_ARM_ARCH__ >= 7 && defined(CONFIG_SMP) #define ARCH_HAS_PREFETCHW -#define prefetchw(ptr) prefetch(ptr) - -#define ARCH_HAS_SPINLOCK_PREFETCH -#define spin_lock_prefetch(x) do { } while (0) - +static inline void prefetchw(const void *ptr) +{ + __asm__ __volatile__( + ".arch_extension mp\n" + __ALT_SMP_ASM( + WASM(pldw) "\t%a0", + WASM(pld) "\t%a0" + ) + :: "p" (ptr)); +} +#endif #endif #define HAVE_ARCH_PICK_MMAP_LAYOUT |