generic arch_futex_atomic_op_inuser() doesn't need access_ok()

uses get_user() and put_user() for memory accesses

Signed-off-by: Al Viro <[email protected]>

Author: Al Viro

include/asm-generic/futex.h

@@ -33,8 +33,6 @@ arch_futex_atomic_op_inuser(int op, u32 oparg, int *oval, u32 __user *uaddr)
 	int oldval, ret;
 	u32 tmp;
 
-	if (!access_ok(uaddr, sizeof(u32)))
-		return -EFAULT;
 	preempt_disable();
 
 	ret = -EFAULT;