openwrtv3/target/linux/generic/patches-3.12/480-mtd-set-rootfs-to-be-root-dev.patch
Gabor Juhos 5dba0a237e kernel/3.1[02]: move MTD root device setup code to mtdcore
The current code only allows to automatically set
root device on MTD partitions. Move the code to MTD
core to allow to use it with all MTD devices.

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>

SVN-Revision: 38643
2013-11-04 18:37:05 +00:00

26 lines
704 B
Diff

--- a/drivers/mtd/mtdcore.c
+++ b/drivers/mtd/mtdcore.c
@@ -37,6 +37,7 @@
#include <linux/backing-dev.h>
#include <linux/gfp.h>
#include <linux/slab.h>
+#include <linux/root_dev.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
@@ -419,6 +420,15 @@ int add_mtd_device(struct mtd_info *mtd)
of this try_ nonsense, and no bitching about it
either. :) */
__module_get(THIS_MODULE);
+
+ if (!strcmp(mtd->name, "rootfs") &&
+ config_enabled(CONFIG_MTD_ROOTFS_ROOT_DEV) &&
+ ROOT_DEV == 0) {
+ pr_notice("mtd: device %d (%s) set to be root filesystem\n",
+ mtd->index, mtd->name);
+ ROOT_DEV = MKDEV(MTD_BLOCK_MAJOR, mtd->index);
+ }
+
return 0;
fail_added: