Commit 861574d51bbd ("powerpc/uaccess: Implement masked user access")
provides optimised user access by avoiding the cost of access_ok().Use masked user access in arch_futex_atomic_op_inuser() Signed-off-by: Christophe Leroy (CS GROUP) <[email protected]> --- arch/powerpc/include/asm/futex.h | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/arch/powerpc/include/asm/futex.h b/arch/powerpc/include/asm/futex.h index b3001f8b2c1e..8cf3b2e97e17 100644 --- a/arch/powerpc/include/asm/futex.h +++ b/arch/powerpc/include/asm/futex.h @@ -33,8 +33,7 @@ static inline int arch_futex_atomic_op_inuser(int op, int oparg, int *oval, { int oldval = 0, ret; - if (!user_access_begin(uaddr, sizeof(u32))) - return -EFAULT; + uaddr = masked_user_access_begin(uaddr); switch (op) { case FUTEX_OP_SET: @@ -69,8 +68,7 @@ futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr, int ret = 0; u32 prev; - if (!user_access_begin(uaddr, sizeof(u32))) - return -EFAULT; + uaddr = masked_user_access_begin(uaddr); __asm__ __volatile__ ( PPC_ATOMIC_ENTRY_BARRIER -- 2.49.0
