[MTD] generalise the handling of MTD-specific superblocks

Generalise the handling of MTD-specific superblocks so that JFFS2 and ROMFS
can both share it.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

2 files changed, 31 insertions, 0 deletions

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 095a9c9a64fb..151739a55eaf 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -937,6 +937,7 @@ struct super_block {
         struct list_head        s_files;
 
         struct block_device     *s_bdev;
+        struct mtd_info         *s_mtd;
         struct list_head        s_instances;
         struct quota_info       s_dquot;        /* Diskquota specific options */
 
diff --git a/include/linux/mtd/super.h b/include/linux/mtd/super.h
new file mode 100644
index 000000000000..4016dd6fe336
--- /dev/null
+++ b/include/linux/mtd/super.h
@@ -0,0 +1,30 @@
+/* MTD-based superblock handling
+ *
+ * Copyright © 2006 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#ifndef __MTD_SUPER_H__
+#define __MTD_SUPER_H__
+
+#ifdef __KERNEL__
+
+#include <linux/mtd/mtd.h>
+#include <linux/fs.h>
+#include <linux/mount.h>
+
+extern int get_sb_mtd(struct file_system_type *fs_type, int flags,
+                      const char *dev_name, void *data,
+                      int (*fill_super)(struct super_block *, void *, int),
+                      struct vfsmount *mnt);
+extern void kill_mtd_super(struct super_block *sb);
+
+
+#endif /* __KERNEL__ */
+
+#endif /* __MTD_SUPER_H__ */