gfs2: Remove sb_start_write from gfs2_statfs_sync

Before this patch, function gfs2_statfs_sync called sb_start_write and
sb_end_write. This is completely unnecessary because, aside from grabbing
glocks, gfs2_statfs_sync does all its updates to statfs with a transaction:
gfs2_trans_begin and _end. And transactions always do sb_start_intwrite in
gfs2_trans_begin and sb_end_intwrite in gfs2_trans_end.

This patch simply removes the call to sb_start_write.

Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>

diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c
index b3d951a..2f56acc 100644 (file)
--- a/fs/gfs2/super.c
+++ b/fs/gfs2/super.c
@@ -353,7 +353,6 @@ int gfs2_statfs_sync(struct super_block *sb, int type)
        struct buffer_head *m_bh, *l_bh;
        int error;
 
-       sb_start_write(sb);
        error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, GL_NOCACHE,
                                   &gh);
        if (error)
@@ -392,7 +391,6 @@ out_bh:
 out_unlock:
        gfs2_glock_dq_uninit(&gh);
 out:
-       sb_end_write(sb);
        return error;
 }