futex: Cleanup generic SMP variant of arch_futex_atomic_op_inuser()

The generic SMP variant of arch_futex_atomic_op_inuser() returns always
-ENOSYS so the switch case and surrounding code are pointless. Remove it
and just return -ENOSYS.

Signed-off-by: Vasily Averin <vvs@virtuozzo.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lkml.kernel.org/r/12bdaca8-99eb-e576-f842-5970ab1d6a92@virtuozzo.com

diff --git a/include/asm-generic/futex.h b/include/asm-generic/futex.h
index 8666fe7f35d77dc423ae24c19f2be8f63ba2144c..02970b11f71f47b5e2ef93853d24587af530e702 100644 (file)
--- a/include/asm-generic/futex.h
+++ b/include/asm-generic/futex.h
@@ -118,26 +118,7 @@ futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr,
 static inline int
 arch_futex_atomic_op_inuser(int op, u32 oparg, int *oval, u32 __user *uaddr)
 {
-       int oldval = 0, ret;
-
-       pagefault_disable();
-
-       switch (op) {
-       case FUTEX_OP_SET:
-       case FUTEX_OP_ADD:
-       case FUTEX_OP_OR:
-       case FUTEX_OP_ANDN:
-       case FUTEX_OP_XOR:
-       default:
-               ret = -ENOSYS;
-       }
-
-       pagefault_enable();
-
-       if (!ret)
-               *oval = oldval;
-
-       return ret;
+       return -ENOSYS;
 }
 
 static inline int