mtd: introduce mtd_sync interface

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
diff --git a/fs/jffs2/super.c b/fs/jffs2/super.c
index e7e9744..e78bf3c 100644
--- a/fs/jffs2/super.c
+++ b/fs/jffs2/super.c
@@ -337,7 +337,7 @@
 	kfree(c->inocache_list);
 	jffs2_clear_xattr_subsystem(c);
 	if (c->mtd->sync)
-		c->mtd->sync(c->mtd);
+		mtd_sync(c->mtd);
 
 	D1(printk(KERN_DEBUG "jffs2_put_super returning\n"));
 }
diff --git a/fs/logfs/dev_mtd.c b/fs/logfs/dev_mtd.c
index 1842440..0ca7a07 100644
--- a/fs/logfs/dev_mtd.c
+++ b/fs/logfs/dev_mtd.c
@@ -120,7 +120,7 @@
 	struct mtd_info *mtd = logfs_super(sb)->s_mtd;
 
 	if (mtd->sync)
-		mtd->sync(mtd);
+		mtd_sync(mtd);
 }
 
 static int logfs_mtd_readpage(void *_sb, struct page *page)