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diff -Nur linux-4.1.15.orig/drivers/mtd/mtdpart.c linux-4.1.15/drivers/mtd/mtdpart.c
--- linux-4.1.15.orig/drivers/mtd/mtdpart.c 2015-12-15 06:24:51.000000000 +0100
+++ linux-4.1.15/drivers/mtd/mtdpart.c 2015-12-26 21:02:02.766905805 +0100
@@ -30,6 +30,7 @@
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
#include <linux/err.h>
+#include <linux/root_dev.h>
#include <linux/kconfig.h>
#include "mtdcore.h"
@@ -667,6 +668,14 @@
if (IS_ERR(slave))
return PTR_ERR(slave);
+ if (strcmp(parts[i].name, "rootfs") == 0) {
+ if (ROOT_DEV == 0) {
+ printk(KERN_NOTICE "mtd: partition \"rootfs\" "
+ "set to be root filesystem\n");
+ ROOT_DEV = MKDEV(MTD_BLOCK_MAJOR, i);
+ }
+ }
+
mutex_lock(&mtd_partitions_mutex);
list_add(&slave->list, &mtd_partitions);
mutex_unlock(&mtd_partitions_mutex);
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