mutex: Avoid label warning when !CONFIG_MUTEX_SPIN_ON_OWNER

Fengguang reported the following warning when optimistic
spinning is disabled (ie: make allnoconfig):

   kernel/mutex.c:599:1: warning: label 'done' defined but not used

Remove the 'done' label altogether.

Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Davidlohr Bueso <davidlohr.bueso@hp.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>

diff --git a/kernel/mutex.c b/kernel/mutex.c
index 386ad5d..98164a5 100644 (file)
--- a/kernel/mutex.c
+++ b/kernel/mutex.c
@@ -489,7 +489,8 @@ __mutex_lock_common(struct mutex *lock, long state, unsigned int subclass,
 
                        mutex_set_owner(lock);
                        mspin_unlock(MLOCK(lock), &node);
-                       goto done;
+                       preempt_enable();
+                       return 0;
                }
                mspin_unlock(MLOCK(lock), &node);
 
@@ -596,7 +597,6 @@ skip_wait:
        }
 
        spin_unlock_mutex(&lock->wait_lock, flags);
-done:
        preempt_enable();
        return 0;