GFS2: Eliminate vestigial sd_log_flush_wrapped

Superblock variable sd_log_flush_wrapped is set, but never referenced,
so this patch eliminates it.
Signed-off-by: Bob Peterson <rpeterso@redhat.com>

fs/gfs2/incore.h

@@ -820,7 +820,6 @@ struct gfs2_sbd {
 	wait_queue_head_t sd_reserving_log_wait;
 
 	unsigned int sd_log_flush_head;
-	u64 sd_log_flush_wrapped;
 
 	spinlock_t sd_ail_lock;
 	struct list_head sd_ail1_list;

fs/gfs2/log.c

@@ -722,7 +722,6 @@ void gfs2_log_flush(struct gfs2_sbd *sdp, struct gfs2_glock *gl,
 		clear_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags);
 
 	sdp->sd_log_flush_head = sdp->sd_log_head;
-	sdp->sd_log_flush_wrapped = 0;
 	tr = sdp->sd_log_tr;
 	if (tr) {
 		sdp->sd_log_tr = NULL;
@@ -775,7 +774,6 @@ void gfs2_log_flush(struct gfs2_sbd *sdp, struct gfs2_glock *gl,
 			}
 			atomic_dec(&sdp->sd_log_blks_free); /* Adjust for unreserved buffer */
 			trace_gfs2_log_blocks(sdp, -1);
-			sdp->sd_log_flush_wrapped = 0;
 			log_write_header(sdp, 0);
 			sdp->sd_log_head = sdp->sd_log_flush_head;
 		}
@@ -880,7 +878,6 @@ void gfs2_log_shutdown(struct gfs2_sbd *sdp)
 	gfs2_assert_withdraw(sdp, list_empty(&sdp->sd_ail1_list));
 
 	sdp->sd_log_flush_head = sdp->sd_log_head;
-	sdp->sd_log_flush_wrapped = 0;
 
 	log_write_header(sdp, GFS2_LOG_HEAD_UNMOUNT);
 

fs/gfs2/lops.c

@@ -134,10 +134,8 @@ static void gfs2_log_incr_head(struct gfs2_sbd *sdp)
 	BUG_ON((sdp->sd_log_flush_head == sdp->sd_log_tail) &&
 	       (sdp->sd_log_flush_head != sdp->sd_log_head));
 
-	if (++sdp->sd_log_flush_head == sdp->sd_jdesc->jd_blocks) {
+	if (++sdp->sd_log_flush_head == sdp->sd_jdesc->jd_blocks)
 		sdp->sd_log_flush_head = 0;
-		sdp->sd_log_flush_wrapped = 1;
-	}
 }
 
 static u64 gfs2_log_bmap(struct gfs2_sbd *sdp)