futex: Simplify return logic

No need to assign ret in each case and break. Simply return the result of the handler function directly. Signed-off-by: Thomas Gleixner <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Darren Hart <[email protected]>
klaby · Feb 15, 2012 · 81b4053 · 81b4053
1 parent 59263b5
commit 81b4053
Showing 1 changed file with 13 additions and 25 deletions.
diff --git a/kernel/futex.c b/kernel/futex.c
@@ -2616,7 +2616,7 @@ void exit_robust_list(struct task_struct *curr)
 long do_futex(u32 __user *uaddr, int op, u32 val, ktime_t *timeout,
 		u32 __user *uaddr2, u32 val2, u32 val3)
 {
-	int ret = -ENOSYS, cmd = op & FUTEX_CMD_MASK;
+	int cmd = op & FUTEX_CMD_MASK;
 	unsigned int flags = 0;
 
 	if (!(op & FUTEX_PRIVATE_FLAG))
@@ -2642,43 +2642,31 @@ long do_futex(u32 __user *uaddr, int op, u32 val, ktime_t *timeout,
 	case FUTEX_WAIT:
 		val3 = FUTEX_BITSET_MATCH_ANY;
 	case FUTEX_WAIT_BITSET:
-		ret = futex_wait(uaddr, flags, val, timeout, val3);
-		break;
+		return futex_wait(uaddr, flags, val, timeout, val3);
 	case FUTEX_WAKE:
 		val3 = FUTEX_BITSET_MATCH_ANY;
 	case FUTEX_WAKE_BITSET:
-		ret = futex_wake(uaddr, flags, val, val3);
-		break;
+		return futex_wake(uaddr, flags, val, val3);
 	case FUTEX_REQUEUE:
-		ret = futex_requeue(uaddr, flags, uaddr2, val, val2, NULL, 0);
-		break;
+		return futex_requeue(uaddr, flags, uaddr2, val, val2, NULL, 0);
 	case FUTEX_CMP_REQUEUE:
-		ret = futex_requeue(uaddr, flags, uaddr2, val, val2, &val3, 0);
-		break;
+		return futex_requeue(uaddr, flags, uaddr2, val, val2, &val3, 0);
 	case FUTEX_WAKE_OP:
-		ret = futex_wake_op(uaddr, flags, uaddr2, val, val2, val3);
-		break;
+		return futex_wake_op(uaddr, flags, uaddr2, val, val2, val3);
 	case FUTEX_LOCK_PI:
-		ret = futex_lock_pi(uaddr, flags, val, timeout, 0);
-		break;
+		return futex_lock_pi(uaddr, flags, val, timeout, 0);
 	case FUTEX_UNLOCK_PI:
-		ret = futex_unlock_pi(uaddr, flags);
-		break;
+		return futex_unlock_pi(uaddr, flags);
 	case FUTEX_TRYLOCK_PI:
-		ret = futex_lock_pi(uaddr, flags, 0, timeout, 1);
-		break;
+		return futex_lock_pi(uaddr, flags, 0, timeout, 1);
 	case FUTEX_WAIT_REQUEUE_PI:
 		val3 = FUTEX_BITSET_MATCH_ANY;
-		ret = futex_wait_requeue_pi(uaddr, flags, val, timeout, val3,
-					    uaddr2);
-		break;
+		return futex_wait_requeue_pi(uaddr, flags, val, timeout, val3,
+					     uaddr2);
 	case FUTEX_CMP_REQUEUE_PI:
-		ret = futex_requeue(uaddr, flags, uaddr2, val, val2, &val3, 1);
-		break;
-	default:
-		ret = -ENOSYS;
+		return futex_requeue(uaddr, flags, uaddr2, val, val2, &val3, 1);
 	}
-	return ret;
+	return -ENOSYS;
 }