-diff -ur linux.old/fs/jffs2/scan.c linux.dev/fs/jffs2/scan.c
---- linux.old/fs/jffs2/scan.c 2003-11-28 19:26:21.000000000 +0100
-+++ linux.dev/fs/jffs2/scan.c 2006-06-22 00:29:02.000000000 +0200
+Index: linux-2.4.35.4/fs/jffs2/build.c
+===================================================================
+--- linux-2.4.35.4.orig/fs/jffs2/build.c
++++ linux-2.4.35.4/fs/jffs2/build.c
+@@ -31,6 +31,10 @@
+ * provisions above, a recipient may use your version of this file
+ * under either the RHEPL or the GPL.
+ *
++ * Modification for automatically cleaning the filesystem after
++ * a specially marked block
++ * Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org>
++ *
+ * $Id: build.c,v 1.16.2.3 2003/04/30 09:43:32 dwmw2 Exp $
+ *
+ */
+@@ -38,6 +42,7 @@
+ #include <linux/kernel.h>
+ #include <linux/jffs2.h>
+ #include <linux/slab.h>
++#include <linux/mtd/mtd.h>
+ #include "nodelist.h"
+
+ int jffs2_build_inode_pass1(struct jffs2_sb_info *, struct jffs2_inode_cache *);
+@@ -89,6 +94,18 @@ int jffs2_build_filesystem(struct jffs2_
+ if (ret)
+ return ret;
+
++ if (c->flags & (1 << 7)) {
++ printk("%s(): unlocking the mtd device... ", __func__);
++ if (c->mtd->unlock)
++ c->mtd->unlock(c->mtd, 0, c->mtd->size);
++ printk("done.\n");
++
++ printk("%s(): erasing all blocks after the end marker... ", __func__);
++ jffs2_erase_pending_blocks(c);
++ jffs2_mark_erased_blocks(c);
++ printk("done.\n");
++ }
++
+ D1(printk(KERN_DEBUG "Scanned flash completely\n"));
+ /* Now build the data map for each inode, marking obsoleted nodes
+ as such, and also increase nlink of any children. */
+Index: linux-2.4.35.4/fs/jffs2/scan.c
+===================================================================
+--- linux-2.4.35.4.orig/fs/jffs2/scan.c
++++ linux-2.4.35.4/fs/jffs2/scan.c
@@ -31,6 +31,10 @@
* provisions above, a recipient may use your version of this file
* under either the RHEPL or the GPL.
* $Id: scan.c,v 1.51.2.4 2003/11/02 13:51:18 dwmw2 Exp $
*
*/
-@@ -88,7 +92,12 @@
+@@ -88,7 +92,12 @@ int jffs2_scan_medium(struct jffs2_sb_in
for (i=0; i<c->nr_blocks; i++) {
struct jffs2_eraseblock *jeb = &c->blocks[i];
if (ret < 0)
return ret;
-@@ -145,15 +154,23 @@
- c->nr_erasing_blocks++;
- }
- }
-- /* Rotate the lists by some number to ensure wear levelling */
-- jffs2_rotate_lists(c);
-
-- if (c->nr_erasing_blocks) {
-- if (!c->used_size && empty_blocks != c->nr_blocks) {
-- printk(KERN_NOTICE "Cowardly refusing to erase blocks on filesystem with no valid JFFS2 nodes\n");
-- return -EIO;
-+ if (c->flags & (1 << 7)) {
-+ printk("jffs2_scan_medium(): erasing all blocks after the end marker...\n");
-+ jffs2_erase_pending_blocks(c);
-+ jffs2_mark_erased_blocks(c);
-+ printk("jffs2_scan_medium(): done.\n");
-+ } else {
-+ /* Rotate the lists by some number to ensure wear levelling */
-+ jffs2_rotate_lists(c);
-+
-+ if (c->nr_erasing_blocks) {
-+ if (!c->used_size && empty_blocks != c->nr_blocks) {
-+ printk(KERN_NOTICE "Cowardly refusing to erase blocks on filesystem with no valid JFFS2 nodes\n");
-+ return -EIO;
-+ }
-+ jffs2_erase_pending_trigger(c);
- }
-- jffs2_erase_pending_trigger(c);
- }
- return 0;
- }
-@@ -181,6 +197,7 @@
+@@ -181,6 +190,7 @@ static int jffs2_scan_eraseblock (struct
while(ofs < jeb->offset + c->sector_size) {
ssize_t retlen;
ACCT_PARANOIA_CHECK(jeb);
if (ofs & 3) {
-@@ -202,8 +219,18 @@
+@@ -202,8 +212,18 @@ static int jffs2_scan_eraseblock (struct
break;
}
if (err) {
D1(printk(KERN_WARNING "mtd->read(0x%x bytes from 0x%x) returned %d\n", sizeof(node), ofs, err));
return err;
-