Merge branch 'async-scsi-resume' of git://git.kernel.org/pub/scm/linux/kernel/git...

[linux.git] / arch / arm / include / asm / futex.h

diff --git a/arch/arm/include/asm/futex.h b/arch/arm/include/asm/futex.h
index e42cf597f6e6b5b7bcad58cdf9e75289d66672d4..53e69dae796f32e495ab262953d4b52cce0cc303 100644 (file)
--- a/arch/arm/include/asm/futex.h
+++ b/arch/arm/include/asm/futex.h
@@ -3,11 +3,6 @@
 
 #ifdef __KERNEL__
 
-#if defined(CONFIG_CPU_USE_DOMAINS) && defined(CONFIG_SMP)
-/* ARM doesn't provide unprivileged exclusive memory accessors */
-#include <asm-generic/futex.h>
-#else
-
 #include <linux/futex.h>
 #include <linux/uaccess.h>
 #include <asm/errno.h>
@@ -28,6 +23,7 @@
 
 #define __futex_atomic_op(insn, ret, oldval, tmp, uaddr, oparg)        \
        smp_mb();                                               \
+       prefetchw(uaddr);                                       \
        __asm__ __volatile__(                                   \
        "1:     ldrex   %1, [%3]\n"                             \
        "       " insn "\n"                                     \
@@ -51,6 +47,8 @@ futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr,
                return -EFAULT;
 
        smp_mb();
+       /* Prefetching cannot fault */
+       prefetchw(uaddr);
        __asm__ __volatile__("@futex_atomic_cmpxchg_inatomic\n"
        "1:     ldrex   %1, [%4]\n"
        "       teq     %1, %2\n"
@@ -164,6 +162,5 @@ futex_atomic_op_inuser (int encoded_op, u32 __user *uaddr)
        return ret;
 }
 
-#endif /* !(CPU_USE_DOMAINS && SMP) */
 #endif /* __KERNEL__ */
 #endif /* _ASM_ARM_FUTEX_H */