ocfs2: fix wake_up in unlock_ast

In ocfs2_unlock_ast(), call wake_up() on lockres before releasing
the spin lock on it.  As soon as the spin lock is released, the
lockres can be freed.

Signed-off-by: David Teigland <teigland@redhat.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>

diff --git a/fs/ocfs2/dlmglue.c b/fs/ocfs2/dlmglue.c
index ec684426034b6dc39ab2b772acc918d07cce6ccd..6e6cc0a2e5f7a51ed9c5e3b72e4ae90471ea77a7 100644 (file)
--- a/fs/ocfs2/dlmglue.c
+++ b/fs/ocfs2/dlmglue.c
@@ -2841,9 +2841,8 @@ static void ocfs2_unlock_ast(void *opaque, int error)
 
        lockres_clear_flags(lockres, OCFS2_LOCK_BUSY);
        lockres->l_unlock_action = OCFS2_UNLOCK_INVALID;
-       spin_unlock_irqrestore(&lockres->l_lock, flags);
-
        wake_up(&lockres->l_event);
+       spin_unlock_irqrestore(&lockres->l_lock, flags);
 
        mlog_exit_void();
 }