[GFS2] sem -> mutex conversion in locking.c

Convert a semaphore to a mutex in locking.c and also tidy
up one or two loose ends.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
diff --git a/fs/gfs2/log.c b/fs/gfs2/log.c
index 9e32e0f..134fc57 100644
--- a/fs/gfs2/log.c
+++ b/fs/gfs2/log.c
@@ -587,10 +587,9 @@
 	log_write_header(sdp, GFS2_LOG_HEAD_UNMOUNT, 0);
 
 	/* printk(KERN_INFO "sd_log_blks_free %u, sd_jdesc->jd_blocks %u\n", sdp->sd_log_blks_free, sdp->sd_jdesc->jd_blocks); */
-	gfs2_assert_withdraw(sdp, sdp->sd_log_blks_free ==
-			     sdp->sd_jdesc->jd_blocks);
-	gfs2_assert_withdraw(sdp, sdp->sd_log_head == sdp->sd_log_tail);
-	gfs2_assert_withdraw(sdp, list_empty(&sdp->sd_ail2_list));
+	gfs2_assert_warn(sdp, sdp->sd_log_blks_free == sdp->sd_jdesc->jd_blocks);
+	gfs2_assert_warn(sdp, sdp->sd_log_head == sdp->sd_log_tail);
+	gfs2_assert_warn(sdp, list_empty(&sdp->sd_ail2_list));
 
 	sdp->sd_log_head = sdp->sd_log_flush_head;
 	sdp->sd_log_tail = sdp->sd_log_head;