gfs2: Rename sd_{ glock => kill }_wait

Rename sd_glock_wait to sd_kill_wait: we'll use it for other things
related to "killing" a filesystem on unmount soon (kill_sb).
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>

fs/gfs2/glock.c

@@ -176,7 +176,7 @@ void gfs2_glock_free(struct gfs2_glock *gl)
 	wake_up_glock(gl);
 	call_rcu(&gl->gl_rcu, gfs2_glock_dealloc);
 	if (atomic_dec_and_test(&sdp->sd_glock_disposal))
-		wake_up(&sdp->sd_glock_wait);
+		wake_up(&sdp->sd_kill_wait);
 }
 
 /**
@@ -1231,7 +1231,7 @@ int gfs2_glock_get(struct gfs2_sbd *sdp, u64 number,
 out_free:
 	gfs2_glock_dealloc(&gl->gl_rcu);
 	if (atomic_dec_and_test(&sdp->sd_glock_disposal))
-		wake_up(&sdp->sd_glock_wait);
+		wake_up(&sdp->sd_kill_wait);
 
 out:
 	return ret;
@@ -2188,7 +2188,7 @@ void gfs2_gl_hash_clear(struct gfs2_sbd *sdp)
 	flush_workqueue(glock_workqueue);
 	glock_hash_walk(clear_glock, sdp);
 	flush_workqueue(glock_workqueue);
-	wait_event_timeout(sdp->sd_glock_wait,
+	wait_event_timeout(sdp->sd_kill_wait,
 			   atomic_read(&sdp->sd_glock_disposal) == 0,
 			   HZ * 600);
 	glock_hash_walk(dump_glock_func, sdp);

fs/gfs2/incore.h

@@ -716,7 +716,7 @@ struct gfs2_sbd {
 	struct gfs2_glock *sd_rename_gl;
 	struct gfs2_glock *sd_freeze_gl;
 	struct work_struct sd_freeze_work;
-	wait_queue_head_t sd_glock_wait;
+	wait_queue_head_t sd_kill_wait;
 	wait_queue_head_t sd_async_glock_wait;
 	atomic_t sd_glock_disposal;
 	struct completion sd_locking_init;

fs/gfs2/ops_fstype.c

@@ -87,7 +87,7 @@ static struct gfs2_sbd *init_sbd(struct super_block *sb)
 	set_bit(SDF_NOJOURNALID, &sdp->sd_flags);
 	gfs2_tune_init(&sdp->sd_tune);
 
-	init_waitqueue_head(&sdp->sd_glock_wait);
+	init_waitqueue_head(&sdp->sd_kill_wait);
 	init_waitqueue_head(&sdp->sd_async_glock_wait);
 	atomic_set(&sdp->sd_glock_disposal, 0);
 	init_completion(&sdp->sd_locking_init);