[PATCH 43/58] [GFS2] Eliminate the no longer needed sd_statfs_mutex

[swhiteho]

From: Bob Peterson <rpeterso@xxxxxxxxxx>

This patch eliminates the unneeded sd_statfs_mutex mutex but preserves
the ordering as discussed.

Signed-off-by: Bob Peterson <rpeterso@xxxxxxxxxx>
Signed-off-by: Steven Whitehouse <swhiteho@xxxxxxxxxx>

diff --git a/fs/gfs2/incore.h b/fs/gfs2/incore.h
index 14862d1..9a83429 100644
--- a/fs/gfs2/incore.h
+++ b/fs/gfs2/incore.h
@@ -527,7 +527,6 @@ struct gfs2_sbd {
 	/* StatFS stuff */
 
 	spinlock_t sd_statfs_spin;
-	struct mutex sd_statfs_mutex;
 	struct gfs2_statfs_change_host sd_statfs_master;
 	struct gfs2_statfs_change_host sd_statfs_local;
 	unsigned long sd_statfs_sync_time;
diff --git a/fs/gfs2/ops_fstype.c b/fs/gfs2/ops_fstype.c
index 35ec630..22e260e 100644
--- a/fs/gfs2/ops_fstype.c
+++ b/fs/gfs2/ops_fstype.c
@@ -60,7 +60,6 @@ static struct gfs2_sbd *init_sbd(struct super_block *sb)
 
 	mutex_init(&sdp->sd_inum_mutex);
 	spin_lock_init(&sdp->sd_statfs_spin);
-	mutex_init(&sdp->sd_statfs_mutex);
 
 	spin_lock_init(&sdp->sd_rindex_spin);
 	mutex_init(&sdp->sd_rindex_mutex);
diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c
index dda7747..73e49df 100644
--- a/fs/gfs2/super.c
+++ b/fs/gfs2/super.c
@@ -686,9 +686,7 @@ void gfs2_statfs_change(struct gfs2_sbd *sdp, s64 total, s64 free,
 	if (error)
 		return;
 
-	mutex_lock(&sdp->sd_statfs_mutex);
 	gfs2_trans_add_bh(l_ip->i_gl, l_bh, 1);
-	mutex_unlock(&sdp->sd_statfs_mutex);
 
 	spin_lock(&sdp->sd_statfs_spin);
 	l_sc->sc_total += total;
@@ -736,9 +734,7 @@ int gfs2_statfs_sync(struct gfs2_sbd *sdp)
 	if (error)
 		goto out_bh2;
 
-	mutex_lock(&sdp->sd_statfs_mutex);
 	gfs2_trans_add_bh(l_ip->i_gl, l_bh, 1);
-	mutex_unlock(&sdp->sd_statfs_mutex);
 
 	spin_lock(&sdp->sd_statfs_spin);
 	m_sc->sc_total += l_sc->sc_total;
-- 
1.5.1.2

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