[GFS2] check kthread_should_stop when waiting

Use wait_event_interruptible() in the lock_dlm thread instead
of an open coded equivalent, and include a kthread_should_stop()
check in the wait test so we don't miss a kthread_stop().

Signed-off-by: David Teigland <teigland@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

1 files changed, 2 insertions, 7 deletions

diff --git a/fs/gfs2/locking/dlm/thread.c b/fs/gfs2/locking/dlm/thread.c
index bd938f06481d..521694fc19d6 100644
--- a/fs/gfs2/locking/dlm/thread.c
+++ b/fs/gfs2/locking/dlm/thread.c
@@ -273,18 +273,13 @@ static int gdlm_thread(void *data, int blist)
         struct gdlm_ls *ls = (struct gdlm_ls *) data;
         struct gdlm_lock *lp = NULL;
         uint8_t complete, blocking, submit, drop;
-        DECLARE_WAITQUEUE(wait, current);
 
         /* Only thread1 is allowed to do blocking callbacks since gfs
            may wait for a completion callback within a blocking cb. */
 
         while (!kthread_should_stop()) {
-                set_current_state(TASK_INTERRUPTIBLE);
-                add_wait_queue(&ls->thread_wait, &wait);
-                if (no_work(ls, blist))
-                        schedule();
-                remove_wait_queue(&ls->thread_wait, &wait);
-                set_current_state(TASK_RUNNING);
+                wait_event_interruptible(ls->thread_wait,
+                                !no_work(ls, blist) || kthread_should_stop());
 
                 complete = blocking = submit = drop = 0;