From: Felix Fietkau <nbd@openwrt.org>
Date: Thu, 1 Mar 2007 23:52:19 +0000 (+0000)
Subject: move mtd rootfs split patch to generic-2.6, disabled for broadcom targets until the... 
X-Git-Tag: v19.07.0-rc1~40470
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=a256c81dd99148e289dc7a73c01b9108701ad9d3;p=openwrt%2Fstaging%2Fhauke.git

move mtd rootfs split patch to generic-2.6, disabled for broadcom targets until the flash map driver is updated and tested

SVN-Revision: 6449
---

diff --git a/target/linux/atheros-2.6/patches/160-rootfs_split.patch b/target/linux/atheros-2.6/patches/160-rootfs_split.patch
deleted file mode 100644
index e2e52f6def..0000000000
--- a/target/linux/atheros-2.6/patches/160-rootfs_split.patch
+++ /dev/null
@@ -1,414 +0,0 @@
-diff -ur linux.old/drivers/mtd/Kconfig linux.dev/drivers/mtd/Kconfig
---- linux.old/drivers/mtd/Kconfig	2007-01-10 20:10:37.000000000 +0100
-+++ linux.dev/drivers/mtd/Kconfig	2007-02-19 23:00:53.739457000 +0100
-@@ -49,6 +49,11 @@
- 	  devices. Partitioning on NFTL 'devices' is a different - that's the
- 	  'normal' form of partitioning used on a block device.
- 
-+config MTD_SPLIT_ROOTFS
-+	bool "Automatically split rootfs partition for squashfs"
-+	depends on MTD_PARTITIONS
-+	default y
-+
- config MTD_REDBOOT_PARTS
- 	tristate "RedBoot partition table parsing"
- 	depends on MTD_PARTITIONS
-diff -ur linux.old/drivers/mtd/mtdpart.c linux.dev/drivers/mtd/mtdpart.c
---- linux.old/drivers/mtd/mtdpart.c	2007-01-10 20:10:37.000000000 +0100
-+++ linux.dev/drivers/mtd/mtdpart.c	2007-02-20 00:01:38.587355896 +0100
-@@ -20,6 +20,8 @@
- #include <linux/mtd/mtd.h>
- #include <linux/mtd/partitions.h>
- #include <linux/mtd/compatmac.h>
-+#include <linux/squashfs_fs.h>
-+#include <linux/root_dev.h>
- 
- /* Our partition linked list */
- static LIST_HEAD(mtd_partitions);
-@@ -303,6 +305,173 @@
- 	return 0;
- }
- 
-+static u_int32_t cur_offset = 0;
-+static int add_mtd_partition(struct mtd_info *master, const struct mtd_partition *part, int i)
-+{
-+	struct mtd_part *slave;
-+	
-+	/* allocate the partition structure */
-+	slave = kmalloc (sizeof(*slave), GFP_KERNEL);
-+	if (!slave) {
-+		printk ("memory allocation error while creating partitions for \"%s\"\n",
-+			master->name);
-+		del_mtd_partitions(master);
-+		return -ENOMEM;
-+	}
-+	memset(slave, 0, sizeof(*slave));
-+	list_add(&slave->list, &mtd_partitions);
-+
-+	/* set up the MTD object for this partition */
-+	slave->mtd.type = master->type;
-+	slave->mtd.flags = master->flags & ~part->mask_flags;
-+	slave->mtd.size = part->size;
-+	slave->mtd.writesize = master->writesize;
-+	slave->mtd.oobsize = master->oobsize;
-+	slave->mtd.ecctype = master->ecctype;
-+	slave->mtd.eccsize = master->eccsize;
-+
-+	slave->mtd.name = part->name;
-+	slave->mtd.bank_size = master->bank_size;
-+	slave->mtd.owner = master->owner;
-+
-+	slave->mtd.read = part_read;
-+	slave->mtd.write = part_write;
-+
-+	if(master->point && master->unpoint){
-+		slave->mtd.point = part_point;
-+		slave->mtd.unpoint = part_unpoint;
-+	}
-+
-+	if (master->read_oob)
-+		slave->mtd.read_oob = part_read_oob;
-+	if (master->write_oob)
-+		slave->mtd.write_oob = part_write_oob;
-+	if(master->read_user_prot_reg)
-+		slave->mtd.read_user_prot_reg = part_read_user_prot_reg;
-+	if(master->read_fact_prot_reg)
-+		slave->mtd.read_fact_prot_reg = part_read_fact_prot_reg;
-+	if(master->write_user_prot_reg)
-+		slave->mtd.write_user_prot_reg = part_write_user_prot_reg;
-+	if(master->lock_user_prot_reg)
-+		slave->mtd.lock_user_prot_reg = part_lock_user_prot_reg;
-+	if(master->get_user_prot_info)
-+		slave->mtd.get_user_prot_info = part_get_user_prot_info;
-+	if(master->get_fact_prot_info)
-+		slave->mtd.get_fact_prot_info = part_get_fact_prot_info;
-+	if (master->sync)
-+		slave->mtd.sync = part_sync;
-+	if (!i && master->suspend && master->resume) {
-+			slave->mtd.suspend = part_suspend;
-+			slave->mtd.resume = part_resume;
-+	}
-+	if (master->writev)
-+		slave->mtd.writev = part_writev;
-+	if (master->lock)
-+		slave->mtd.lock = part_lock;
-+	if (master->unlock)
-+		slave->mtd.unlock = part_unlock;
-+	if (master->block_isbad)
-+		slave->mtd.block_isbad = part_block_isbad;
-+	if (master->block_markbad)
-+		slave->mtd.block_markbad = part_block_markbad;
-+	slave->mtd.erase = part_erase;
-+	slave->master = master;
-+	slave->offset = part->offset;
-+	slave->index = i;
-+
-+	if (slave->offset == MTDPART_OFS_APPEND)
-+		slave->offset = cur_offset;
-+	if (slave->offset == MTDPART_OFS_NXTBLK) {
-+		slave->offset = cur_offset;
-+		if ((cur_offset % master->erasesize) != 0) {
-+			/* Round up to next erasesize */
-+			slave->offset = ((cur_offset / master->erasesize) + 1) * master->erasesize;
-+			printk(KERN_NOTICE "Moving partition %d: "
-+			       "0x%08x -> 0x%08x\n", i,
-+			       cur_offset, slave->offset);
-+		}
-+	}
-+	if (slave->mtd.size == MTDPART_SIZ_FULL)
-+		slave->mtd.size = master->size - slave->offset;
-+	cur_offset = slave->offset + slave->mtd.size;
-+
-+	printk (KERN_NOTICE "0x%08x-0x%08x : \"%s\"\n", slave->offset,
-+		slave->offset + slave->mtd.size, slave->mtd.name);
-+
-+	/* let's do some sanity checks */
-+	if (slave->offset >= master->size) {
-+			/* let's register it anyway to preserve ordering */
-+		slave->offset = 0;
-+		slave->mtd.size = 0;
-+		printk ("mtd: partition \"%s\" is out of reach -- disabled\n",
-+			part->name);
-+	}
-+	if (slave->offset + slave->mtd.size > master->size) {
-+		slave->mtd.size = master->size - slave->offset;
-+		printk ("mtd: partition \"%s\" extends beyond the end of device \"%s\" -- size truncated to %#x\n",
-+			part->name, master->name, slave->mtd.size);
-+	}
-+	if (master->numeraseregions>1) {
-+		/* Deal with variable erase size stuff */
-+		int i;
-+		struct mtd_erase_region_info *regions = master->eraseregions;
-+
-+		/* Find the first erase regions which is part of this partition. */
-+		for (i=0; i < master->numeraseregions && slave->offset >= regions[i].offset; i++)
-+			;
-+
-+		for (i--; i < master->numeraseregions && slave->offset + slave->mtd.size > regions[i].offset; i++) {
-+			if (slave->mtd.erasesize < regions[i].erasesize) {
-+				slave->mtd.erasesize = regions[i].erasesize;
-+			}
-+		}
-+	} else {
-+		/* Single erase size */
-+		slave->mtd.erasesize = master->erasesize;
-+	}
-+
-+	if ((slave->mtd.flags & MTD_WRITEABLE) &&
-+	    (slave->offset % slave->mtd.erasesize)) {
-+		/* Doesn't start on a boundary of major erase size */
-+		/* FIXME: Let it be writable if it is on a boundary of _minor_ erase size though */
-+		slave->mtd.flags &= ~MTD_WRITEABLE;
-+		printk ("mtd: partition \"%s\" doesn't start on an erase block boundary -- force read-only\n",
-+			part->name);
-+	}
-+	if ((slave->mtd.flags & MTD_WRITEABLE) &&
-+	    (slave->mtd.size % slave->mtd.erasesize)) {
-+		slave->mtd.flags &= ~MTD_WRITEABLE;
-+		printk ("mtd: partition \"%s\" doesn't end on an erase block -- force read-only\n",
-+			part->name);
-+	}
-+
-+	slave->mtd.ecclayout = master->ecclayout;
-+	if (master->block_isbad) {
-+		uint32_t offs = 0;
-+
-+		while(offs < slave->mtd.size) {
-+			if (master->block_isbad(master,
-+						offs + slave->offset))
-+				slave->mtd.ecc_stats.badblocks++;
-+			offs += slave->mtd.erasesize;
-+		}
-+	}
-+
-+	if(part->mtdp)
-+	{	/* store the object pointer (caller may or may not register it */
-+		*part->mtdp = &slave->mtd;
-+		slave->registered = 0;
-+	}
-+	else
-+	{
-+		/* register our partition */
-+		add_mtd_device(&slave->mtd);
-+		slave->registered = 1;
-+	}
-+
-+	return 0;
-+}
-+
- /*
-  * This function, given a master MTD object and a partition table, creates
-  * and registers slave MTD objects which are bound to the master according to
-@@ -314,171 +483,53 @@
- 		       const struct mtd_partition *parts,
- 		       int nbparts)
- {
--	struct mtd_part *slave;
--	u_int32_t cur_offset = 0;
--	int i;
-+	struct mtd_partition *part;
-+	int i, ret = 0;
- 
- 	printk (KERN_NOTICE "Creating %d MTD partitions on \"%s\":\n", nbparts, master->name);
- 
- 	for (i = 0; i < nbparts; i++) {
-+		part = (struct mtd_partition *) &parts[i];
-+		ret = add_mtd_partition(master, part, i);
-+		if (ret)
-+			return ret;
-+		if (strcmp(part->name, "rootfs") == 0) {
-+#ifdef CONFIG_MTD_SPLIT_ROOTFS
-+			int len;
-+			char buf[512];
-+			struct squashfs_super_block *sb = (struct squashfs_super_block *) buf;
-+#define ROOTFS_SPLIT_NAME "rootfs_data"
-+			if ((master->read(master, part->offset, sizeof(struct squashfs_super_block), &len, buf) == 0) &&
-+					(len == sizeof(struct squashfs_super_block)) &&
-+					(*((u32 *) buf) == SQUASHFS_MAGIC) &&
-+					(sb->bytes_used > 0)) {
-+
-+				
-+				part = kmalloc(sizeof(struct mtd_partition), GFP_KERNEL);
-+				memcpy(part, &parts[i], sizeof(struct mtd_partition));
-+				
-+				part->name = kmalloc(sizeof(ROOTFS_SPLIT_NAME) + 1, GFP_KERNEL);
-+				strcpy(part->name, ROOTFS_SPLIT_NAME);
-+
-+				len = (u32) sb->bytes_used;
-+				len += (part->offset & 0x000fffff);
-+				len +=  (master->erasesize - 1);
-+				len &= ~(master->erasesize - 1);
-+				len -= (part->offset & 0x000fffff);
-+				part->offset += len;
-+				part->size -= len;
-+			
-+				if (len + master->erasesize < part->size)
-+					ret = add_mtd_partition(master, part, i + 1);
-+				else
-+					kfree(part->name);
-+				if (ret)
-+					return ret;
- 
--		/* allocate the partition structure */
--		slave = kmalloc (sizeof(*slave), GFP_KERNEL);
--		if (!slave) {
--			printk ("memory allocation error while creating partitions for \"%s\"\n",
--				master->name);
--			del_mtd_partitions(master);
--			return -ENOMEM;
--		}
--		memset(slave, 0, sizeof(*slave));
--		list_add(&slave->list, &mtd_partitions);
--
--		/* set up the MTD object for this partition */
--		slave->mtd.type = master->type;
--		slave->mtd.flags = master->flags & ~parts[i].mask_flags;
--		slave->mtd.size = parts[i].size;
--		slave->mtd.writesize = master->writesize;
--		slave->mtd.oobsize = master->oobsize;
--		slave->mtd.ecctype = master->ecctype;
--		slave->mtd.eccsize = master->eccsize;
--
--		slave->mtd.name = parts[i].name;
--		slave->mtd.bank_size = master->bank_size;
--		slave->mtd.owner = master->owner;
--
--		slave->mtd.read = part_read;
--		slave->mtd.write = part_write;
--
--		if(master->point && master->unpoint){
--			slave->mtd.point = part_point;
--			slave->mtd.unpoint = part_unpoint;
--		}
--
--		if (master->read_oob)
--			slave->mtd.read_oob = part_read_oob;
--		if (master->write_oob)
--			slave->mtd.write_oob = part_write_oob;
--		if(master->read_user_prot_reg)
--			slave->mtd.read_user_prot_reg = part_read_user_prot_reg;
--		if(master->read_fact_prot_reg)
--			slave->mtd.read_fact_prot_reg = part_read_fact_prot_reg;
--		if(master->write_user_prot_reg)
--			slave->mtd.write_user_prot_reg = part_write_user_prot_reg;
--		if(master->lock_user_prot_reg)
--			slave->mtd.lock_user_prot_reg = part_lock_user_prot_reg;
--		if(master->get_user_prot_info)
--			slave->mtd.get_user_prot_info = part_get_user_prot_info;
--		if(master->get_fact_prot_info)
--			slave->mtd.get_fact_prot_info = part_get_fact_prot_info;
--		if (master->sync)
--			slave->mtd.sync = part_sync;
--		if (!i && master->suspend && master->resume) {
--				slave->mtd.suspend = part_suspend;
--				slave->mtd.resume = part_resume;
--		}
--		if (master->writev)
--			slave->mtd.writev = part_writev;
--		if (master->lock)
--			slave->mtd.lock = part_lock;
--		if (master->unlock)
--			slave->mtd.unlock = part_unlock;
--		if (master->block_isbad)
--			slave->mtd.block_isbad = part_block_isbad;
--		if (master->block_markbad)
--			slave->mtd.block_markbad = part_block_markbad;
--		slave->mtd.erase = part_erase;
--		slave->master = master;
--		slave->offset = parts[i].offset;
--		slave->index = i;
--
--		if (slave->offset == MTDPART_OFS_APPEND)
--			slave->offset = cur_offset;
--		if (slave->offset == MTDPART_OFS_NXTBLK) {
--			slave->offset = cur_offset;
--			if ((cur_offset % master->erasesize) != 0) {
--				/* Round up to next erasesize */
--				slave->offset = ((cur_offset / master->erasesize) + 1) * master->erasesize;
--				printk(KERN_NOTICE "Moving partition %d: "
--				       "0x%08x -> 0x%08x\n", i,
--				       cur_offset, slave->offset);
-+				kfree(part);
- 			}
--		}
--		if (slave->mtd.size == MTDPART_SIZ_FULL)
--			slave->mtd.size = master->size - slave->offset;
--		cur_offset = slave->offset + slave->mtd.size;
--
--		printk (KERN_NOTICE "0x%08x-0x%08x : \"%s\"\n", slave->offset,
--			slave->offset + slave->mtd.size, slave->mtd.name);
--
--		/* let's do some sanity checks */
--		if (slave->offset >= master->size) {
--				/* let's register it anyway to preserve ordering */
--			slave->offset = 0;
--			slave->mtd.size = 0;
--			printk ("mtd: partition \"%s\" is out of reach -- disabled\n",
--				parts[i].name);
--		}
--		if (slave->offset + slave->mtd.size > master->size) {
--			slave->mtd.size = master->size - slave->offset;
--			printk ("mtd: partition \"%s\" extends beyond the end of device \"%s\" -- size truncated to %#x\n",
--				parts[i].name, master->name, slave->mtd.size);
--		}
--		if (master->numeraseregions>1) {
--			/* Deal with variable erase size stuff */
--			int i;
--			struct mtd_erase_region_info *regions = master->eraseregions;
--
--			/* Find the first erase regions which is part of this partition. */
--			for (i=0; i < master->numeraseregions && slave->offset >= regions[i].offset; i++)
--				;
--
--			for (i--; i < master->numeraseregions && slave->offset + slave->mtd.size > regions[i].offset; i++) {
--				if (slave->mtd.erasesize < regions[i].erasesize) {
--					slave->mtd.erasesize = regions[i].erasesize;
--				}
--			}
--		} else {
--			/* Single erase size */
--			slave->mtd.erasesize = master->erasesize;
--		}
--
--		if ((slave->mtd.flags & MTD_WRITEABLE) &&
--		    (slave->offset % slave->mtd.erasesize)) {
--			/* Doesn't start on a boundary of major erase size */
--			/* FIXME: Let it be writable if it is on a boundary of _minor_ erase size though */
--			slave->mtd.flags &= ~MTD_WRITEABLE;
--			printk ("mtd: partition \"%s\" doesn't start on an erase block boundary -- force read-only\n",
--				parts[i].name);
--		}
--		if ((slave->mtd.flags & MTD_WRITEABLE) &&
--		    (slave->mtd.size % slave->mtd.erasesize)) {
--			slave->mtd.flags &= ~MTD_WRITEABLE;
--			printk ("mtd: partition \"%s\" doesn't end on an erase block -- force read-only\n",
--				parts[i].name);
--		}
--
--		slave->mtd.ecclayout = master->ecclayout;
--		if (master->block_isbad) {
--			uint32_t offs = 0;
--
--			while(offs < slave->mtd.size) {
--				if (master->block_isbad(master,
--							offs + slave->offset))
--					slave->mtd.ecc_stats.badblocks++;
--				offs += slave->mtd.erasesize;
--			}
--		}
--
--		if(parts[i].mtdp)
--		{	/* store the object pointer (caller may or may not register it */
--			*parts[i].mtdp = &slave->mtd;
--			slave->registered = 0;
--		}
--		else
--		{
--			/* register our partition */
--			add_mtd_device(&slave->mtd);
--			slave->registered = 1;
-+#endif /* CONFIG_MTD_SPLIT_ROOTFS */
-+			ROOT_DEV = MKDEV(MTD_BLOCK_MAJOR, i);
- 		}
- 	}
- 
diff --git a/target/linux/brcm-2.4/config/default b/target/linux/brcm-2.4/config/default
index ba5a794cfa..876aba9239 100644
--- a/target/linux/brcm-2.4/config/default
+++ b/target/linux/brcm-2.4/config/default
@@ -175,6 +175,7 @@ CONFIG_MSDOS_FS=m
 CONFIG_MTD_BCM947XX=y
 CONFIG_MTD_CFI_SSTSTD=y
 CONFIG_MTD_SFLASH=y
+# CONFIG_MTD_SPLIT_ROOTFS is not set
 # CONFIG_NATSEMI is not set
 # CONFIG_NE2K_PCI is not set
 # CONFIG_NE3210 is not set
diff --git a/target/linux/brcm-2.6/config/default b/target/linux/brcm-2.6/config/default
index 6f829e8b5c..ee5fcade3f 100644
--- a/target/linux/brcm-2.6/config/default
+++ b/target/linux/brcm-2.6/config/default
@@ -198,6 +198,7 @@ CONFIG_MTD_PARTITIONS=y
 # CONFIG_MTD_REDBOOT_PARTS is not set
 # CONFIG_MTD_ROM is not set
 # CONFIG_MTD_SLRAM is not set
+# CONFIG_MTD_SPLIT_ROOTFS is not set
 # CONFIG_NATSEMI is not set
 # CONFIG_NE2K_PCI is not set
 # CONFIG_NETFILTER_XT_MATCH_COMMENT is not set
diff --git a/target/linux/brcm47xx-2.6/config/default b/target/linux/brcm47xx-2.6/config/default
index c3609b964c..0b752808ed 100644
--- a/target/linux/brcm47xx-2.6/config/default
+++ b/target/linux/brcm47xx-2.6/config/default
@@ -200,6 +200,7 @@ CONFIG_MTD_PARTITIONS=y
 # CONFIG_MTD_REDBOOT_PARTS is not set
 # CONFIG_MTD_ROM is not set
 # CONFIG_MTD_SLRAM is not set
+# CONFIG_MTD_SPLIT_ROOTFS is not set
 # CONFIG_NATSEMI is not set
 # CONFIG_NE2K_PCI is not set
 # CONFIG_NETFILTER_XT_MATCH_COMMENT is not set
diff --git a/target/linux/generic-2.6/config-template b/target/linux/generic-2.6/config-template
index 6e653716f7..1f9c1c42e0 100644
--- a/target/linux/generic-2.6/config-template
+++ b/target/linux/generic-2.6/config-template
@@ -556,6 +556,7 @@ CONFIG_MODULE_UNLOAD=y
 # CONFIG_MODVERSIONS is not set
 CONFIG_MSDOS_FS=m
 CONFIG_MSDOS_PARTITION=y
+CONFIG_MTD_SPLIT_ROOTFS=y
 # CONFIG_MYRI10GE is not set
 # CONFIG_NCP_FS is not set
 CONFIG_NET=y
diff --git a/target/linux/generic-2.6/patches/060-rootfs_split.patch b/target/linux/generic-2.6/patches/060-rootfs_split.patch
new file mode 100644
index 0000000000..e2e52f6def
--- /dev/null
+++ b/target/linux/generic-2.6/patches/060-rootfs_split.patch
@@ -0,0 +1,414 @@
+diff -ur linux.old/drivers/mtd/Kconfig linux.dev/drivers/mtd/Kconfig
+--- linux.old/drivers/mtd/Kconfig	2007-01-10 20:10:37.000000000 +0100
++++ linux.dev/drivers/mtd/Kconfig	2007-02-19 23:00:53.739457000 +0100
+@@ -49,6 +49,11 @@
+ 	  devices. Partitioning on NFTL 'devices' is a different - that's the
+ 	  'normal' form of partitioning used on a block device.
+ 
++config MTD_SPLIT_ROOTFS
++	bool "Automatically split rootfs partition for squashfs"
++	depends on MTD_PARTITIONS
++	default y
++
+ config MTD_REDBOOT_PARTS
+ 	tristate "RedBoot partition table parsing"
+ 	depends on MTD_PARTITIONS
+diff -ur linux.old/drivers/mtd/mtdpart.c linux.dev/drivers/mtd/mtdpart.c
+--- linux.old/drivers/mtd/mtdpart.c	2007-01-10 20:10:37.000000000 +0100
++++ linux.dev/drivers/mtd/mtdpart.c	2007-02-20 00:01:38.587355896 +0100
+@@ -20,6 +20,8 @@
+ #include <linux/mtd/mtd.h>
+ #include <linux/mtd/partitions.h>
+ #include <linux/mtd/compatmac.h>
++#include <linux/squashfs_fs.h>
++#include <linux/root_dev.h>
+ 
+ /* Our partition linked list */
+ static LIST_HEAD(mtd_partitions);
+@@ -303,6 +305,173 @@
+ 	return 0;
+ }
+ 
++static u_int32_t cur_offset = 0;
++static int add_mtd_partition(struct mtd_info *master, const struct mtd_partition *part, int i)
++{
++	struct mtd_part *slave;
++	
++	/* allocate the partition structure */
++	slave = kmalloc (sizeof(*slave), GFP_KERNEL);
++	if (!slave) {
++		printk ("memory allocation error while creating partitions for \"%s\"\n",
++			master->name);
++		del_mtd_partitions(master);
++		return -ENOMEM;
++	}
++	memset(slave, 0, sizeof(*slave));
++	list_add(&slave->list, &mtd_partitions);
++
++	/* set up the MTD object for this partition */
++	slave->mtd.type = master->type;
++	slave->mtd.flags = master->flags & ~part->mask_flags;
++	slave->mtd.size = part->size;
++	slave->mtd.writesize = master->writesize;
++	slave->mtd.oobsize = master->oobsize;
++	slave->mtd.ecctype = master->ecctype;
++	slave->mtd.eccsize = master->eccsize;
++
++	slave->mtd.name = part->name;
++	slave->mtd.bank_size = master->bank_size;
++	slave->mtd.owner = master->owner;
++
++	slave->mtd.read = part_read;
++	slave->mtd.write = part_write;
++
++	if(master->point && master->unpoint){
++		slave->mtd.point = part_point;
++		slave->mtd.unpoint = part_unpoint;
++	}
++
++	if (master->read_oob)
++		slave->mtd.read_oob = part_read_oob;
++	if (master->write_oob)
++		slave->mtd.write_oob = part_write_oob;
++	if(master->read_user_prot_reg)
++		slave->mtd.read_user_prot_reg = part_read_user_prot_reg;
++	if(master->read_fact_prot_reg)
++		slave->mtd.read_fact_prot_reg = part_read_fact_prot_reg;
++	if(master->write_user_prot_reg)
++		slave->mtd.write_user_prot_reg = part_write_user_prot_reg;
++	if(master->lock_user_prot_reg)
++		slave->mtd.lock_user_prot_reg = part_lock_user_prot_reg;
++	if(master->get_user_prot_info)
++		slave->mtd.get_user_prot_info = part_get_user_prot_info;
++	if(master->get_fact_prot_info)
++		slave->mtd.get_fact_prot_info = part_get_fact_prot_info;
++	if (master->sync)
++		slave->mtd.sync = part_sync;
++	if (!i && master->suspend && master->resume) {
++			slave->mtd.suspend = part_suspend;
++			slave->mtd.resume = part_resume;
++	}
++	if (master->writev)
++		slave->mtd.writev = part_writev;
++	if (master->lock)
++		slave->mtd.lock = part_lock;
++	if (master->unlock)
++		slave->mtd.unlock = part_unlock;
++	if (master->block_isbad)
++		slave->mtd.block_isbad = part_block_isbad;
++	if (master->block_markbad)
++		slave->mtd.block_markbad = part_block_markbad;
++	slave->mtd.erase = part_erase;
++	slave->master = master;
++	slave->offset = part->offset;
++	slave->index = i;
++
++	if (slave->offset == MTDPART_OFS_APPEND)
++		slave->offset = cur_offset;
++	if (slave->offset == MTDPART_OFS_NXTBLK) {
++		slave->offset = cur_offset;
++		if ((cur_offset % master->erasesize) != 0) {
++			/* Round up to next erasesize */
++			slave->offset = ((cur_offset / master->erasesize) + 1) * master->erasesize;
++			printk(KERN_NOTICE "Moving partition %d: "
++			       "0x%08x -> 0x%08x\n", i,
++			       cur_offset, slave->offset);
++		}
++	}
++	if (slave->mtd.size == MTDPART_SIZ_FULL)
++		slave->mtd.size = master->size - slave->offset;
++	cur_offset = slave->offset + slave->mtd.size;
++
++	printk (KERN_NOTICE "0x%08x-0x%08x : \"%s\"\n", slave->offset,
++		slave->offset + slave->mtd.size, slave->mtd.name);
++
++	/* let's do some sanity checks */
++	if (slave->offset >= master->size) {
++			/* let's register it anyway to preserve ordering */
++		slave->offset = 0;
++		slave->mtd.size = 0;
++		printk ("mtd: partition \"%s\" is out of reach -- disabled\n",
++			part->name);
++	}
++	if (slave->offset + slave->mtd.size > master->size) {
++		slave->mtd.size = master->size - slave->offset;
++		printk ("mtd: partition \"%s\" extends beyond the end of device \"%s\" -- size truncated to %#x\n",
++			part->name, master->name, slave->mtd.size);
++	}
++	if (master->numeraseregions>1) {
++		/* Deal with variable erase size stuff */
++		int i;
++		struct mtd_erase_region_info *regions = master->eraseregions;
++
++		/* Find the first erase regions which is part of this partition. */
++		for (i=0; i < master->numeraseregions && slave->offset >= regions[i].offset; i++)
++			;
++
++		for (i--; i < master->numeraseregions && slave->offset + slave->mtd.size > regions[i].offset; i++) {
++			if (slave->mtd.erasesize < regions[i].erasesize) {
++				slave->mtd.erasesize = regions[i].erasesize;
++			}
++		}
++	} else {
++		/* Single erase size */
++		slave->mtd.erasesize = master->erasesize;
++	}
++
++	if ((slave->mtd.flags & MTD_WRITEABLE) &&
++	    (slave->offset % slave->mtd.erasesize)) {
++		/* Doesn't start on a boundary of major erase size */
++		/* FIXME: Let it be writable if it is on a boundary of _minor_ erase size though */
++		slave->mtd.flags &= ~MTD_WRITEABLE;
++		printk ("mtd: partition \"%s\" doesn't start on an erase block boundary -- force read-only\n",
++			part->name);
++	}
++	if ((slave->mtd.flags & MTD_WRITEABLE) &&
++	    (slave->mtd.size % slave->mtd.erasesize)) {
++		slave->mtd.flags &= ~MTD_WRITEABLE;
++		printk ("mtd: partition \"%s\" doesn't end on an erase block -- force read-only\n",
++			part->name);
++	}
++
++	slave->mtd.ecclayout = master->ecclayout;
++	if (master->block_isbad) {
++		uint32_t offs = 0;
++
++		while(offs < slave->mtd.size) {
++			if (master->block_isbad(master,
++						offs + slave->offset))
++				slave->mtd.ecc_stats.badblocks++;
++			offs += slave->mtd.erasesize;
++		}
++	}
++
++	if(part->mtdp)
++	{	/* store the object pointer (caller may or may not register it */
++		*part->mtdp = &slave->mtd;
++		slave->registered = 0;
++	}
++	else
++	{
++		/* register our partition */
++		add_mtd_device(&slave->mtd);
++		slave->registered = 1;
++	}
++
++	return 0;
++}
++
+ /*
+  * This function, given a master MTD object and a partition table, creates
+  * and registers slave MTD objects which are bound to the master according to
+@@ -314,171 +483,53 @@
+ 		       const struct mtd_partition *parts,
+ 		       int nbparts)
+ {
+-	struct mtd_part *slave;
+-	u_int32_t cur_offset = 0;
+-	int i;
++	struct mtd_partition *part;
++	int i, ret = 0;
+ 
+ 	printk (KERN_NOTICE "Creating %d MTD partitions on \"%s\":\n", nbparts, master->name);
+ 
+ 	for (i = 0; i < nbparts; i++) {
++		part = (struct mtd_partition *) &parts[i];
++		ret = add_mtd_partition(master, part, i);
++		if (ret)
++			return ret;
++		if (strcmp(part->name, "rootfs") == 0) {
++#ifdef CONFIG_MTD_SPLIT_ROOTFS
++			int len;
++			char buf[512];
++			struct squashfs_super_block *sb = (struct squashfs_super_block *) buf;
++#define ROOTFS_SPLIT_NAME "rootfs_data"
++			if ((master->read(master, part->offset, sizeof(struct squashfs_super_block), &len, buf) == 0) &&
++					(len == sizeof(struct squashfs_super_block)) &&
++					(*((u32 *) buf) == SQUASHFS_MAGIC) &&
++					(sb->bytes_used > 0)) {
++
++				
++				part = kmalloc(sizeof(struct mtd_partition), GFP_KERNEL);
++				memcpy(part, &parts[i], sizeof(struct mtd_partition));
++				
++				part->name = kmalloc(sizeof(ROOTFS_SPLIT_NAME) + 1, GFP_KERNEL);
++				strcpy(part->name, ROOTFS_SPLIT_NAME);
++
++				len = (u32) sb->bytes_used;
++				len += (part->offset & 0x000fffff);
++				len +=  (master->erasesize - 1);
++				len &= ~(master->erasesize - 1);
++				len -= (part->offset & 0x000fffff);
++				part->offset += len;
++				part->size -= len;
++			
++				if (len + master->erasesize < part->size)
++					ret = add_mtd_partition(master, part, i + 1);
++				else
++					kfree(part->name);
++				if (ret)
++					return ret;
+ 
+-		/* allocate the partition structure */
+-		slave = kmalloc (sizeof(*slave), GFP_KERNEL);
+-		if (!slave) {
+-			printk ("memory allocation error while creating partitions for \"%s\"\n",
+-				master->name);
+-			del_mtd_partitions(master);
+-			return -ENOMEM;
+-		}
+-		memset(slave, 0, sizeof(*slave));
+-		list_add(&slave->list, &mtd_partitions);
+-
+-		/* set up the MTD object for this partition */
+-		slave->mtd.type = master->type;
+-		slave->mtd.flags = master->flags & ~parts[i].mask_flags;
+-		slave->mtd.size = parts[i].size;
+-		slave->mtd.writesize = master->writesize;
+-		slave->mtd.oobsize = master->oobsize;
+-		slave->mtd.ecctype = master->ecctype;
+-		slave->mtd.eccsize = master->eccsize;
+-
+-		slave->mtd.name = parts[i].name;
+-		slave->mtd.bank_size = master->bank_size;
+-		slave->mtd.owner = master->owner;
+-
+-		slave->mtd.read = part_read;
+-		slave->mtd.write = part_write;
+-
+-		if(master->point && master->unpoint){
+-			slave->mtd.point = part_point;
+-			slave->mtd.unpoint = part_unpoint;
+-		}
+-
+-		if (master->read_oob)
+-			slave->mtd.read_oob = part_read_oob;
+-		if (master->write_oob)
+-			slave->mtd.write_oob = part_write_oob;
+-		if(master->read_user_prot_reg)
+-			slave->mtd.read_user_prot_reg = part_read_user_prot_reg;
+-		if(master->read_fact_prot_reg)
+-			slave->mtd.read_fact_prot_reg = part_read_fact_prot_reg;
+-		if(master->write_user_prot_reg)
+-			slave->mtd.write_user_prot_reg = part_write_user_prot_reg;
+-		if(master->lock_user_prot_reg)
+-			slave->mtd.lock_user_prot_reg = part_lock_user_prot_reg;
+-		if(master->get_user_prot_info)
+-			slave->mtd.get_user_prot_info = part_get_user_prot_info;
+-		if(master->get_fact_prot_info)
+-			slave->mtd.get_fact_prot_info = part_get_fact_prot_info;
+-		if (master->sync)
+-			slave->mtd.sync = part_sync;
+-		if (!i && master->suspend && master->resume) {
+-				slave->mtd.suspend = part_suspend;
+-				slave->mtd.resume = part_resume;
+-		}
+-		if (master->writev)
+-			slave->mtd.writev = part_writev;
+-		if (master->lock)
+-			slave->mtd.lock = part_lock;
+-		if (master->unlock)
+-			slave->mtd.unlock = part_unlock;
+-		if (master->block_isbad)
+-			slave->mtd.block_isbad = part_block_isbad;
+-		if (master->block_markbad)
+-			slave->mtd.block_markbad = part_block_markbad;
+-		slave->mtd.erase = part_erase;
+-		slave->master = master;
+-		slave->offset = parts[i].offset;
+-		slave->index = i;
+-
+-		if (slave->offset == MTDPART_OFS_APPEND)
+-			slave->offset = cur_offset;
+-		if (slave->offset == MTDPART_OFS_NXTBLK) {
+-			slave->offset = cur_offset;
+-			if ((cur_offset % master->erasesize) != 0) {
+-				/* Round up to next erasesize */
+-				slave->offset = ((cur_offset / master->erasesize) + 1) * master->erasesize;
+-				printk(KERN_NOTICE "Moving partition %d: "
+-				       "0x%08x -> 0x%08x\n", i,
+-				       cur_offset, slave->offset);
++				kfree(part);
+ 			}
+-		}
+-		if (slave->mtd.size == MTDPART_SIZ_FULL)
+-			slave->mtd.size = master->size - slave->offset;
+-		cur_offset = slave->offset + slave->mtd.size;
+-
+-		printk (KERN_NOTICE "0x%08x-0x%08x : \"%s\"\n", slave->offset,
+-			slave->offset + slave->mtd.size, slave->mtd.name);
+-
+-		/* let's do some sanity checks */
+-		if (slave->offset >= master->size) {
+-				/* let's register it anyway to preserve ordering */
+-			slave->offset = 0;
+-			slave->mtd.size = 0;
+-			printk ("mtd: partition \"%s\" is out of reach -- disabled\n",
+-				parts[i].name);
+-		}
+-		if (slave->offset + slave->mtd.size > master->size) {
+-			slave->mtd.size = master->size - slave->offset;
+-			printk ("mtd: partition \"%s\" extends beyond the end of device \"%s\" -- size truncated to %#x\n",
+-				parts[i].name, master->name, slave->mtd.size);
+-		}
+-		if (master->numeraseregions>1) {
+-			/* Deal with variable erase size stuff */
+-			int i;
+-			struct mtd_erase_region_info *regions = master->eraseregions;
+-
+-			/* Find the first erase regions which is part of this partition. */
+-			for (i=0; i < master->numeraseregions && slave->offset >= regions[i].offset; i++)
+-				;
+-
+-			for (i--; i < master->numeraseregions && slave->offset + slave->mtd.size > regions[i].offset; i++) {
+-				if (slave->mtd.erasesize < regions[i].erasesize) {
+-					slave->mtd.erasesize = regions[i].erasesize;
+-				}
+-			}
+-		} else {
+-			/* Single erase size */
+-			slave->mtd.erasesize = master->erasesize;
+-		}
+-
+-		if ((slave->mtd.flags & MTD_WRITEABLE) &&
+-		    (slave->offset % slave->mtd.erasesize)) {
+-			/* Doesn't start on a boundary of major erase size */
+-			/* FIXME: Let it be writable if it is on a boundary of _minor_ erase size though */
+-			slave->mtd.flags &= ~MTD_WRITEABLE;
+-			printk ("mtd: partition \"%s\" doesn't start on an erase block boundary -- force read-only\n",
+-				parts[i].name);
+-		}
+-		if ((slave->mtd.flags & MTD_WRITEABLE) &&
+-		    (slave->mtd.size % slave->mtd.erasesize)) {
+-			slave->mtd.flags &= ~MTD_WRITEABLE;
+-			printk ("mtd: partition \"%s\" doesn't end on an erase block -- force read-only\n",
+-				parts[i].name);
+-		}
+-
+-		slave->mtd.ecclayout = master->ecclayout;
+-		if (master->block_isbad) {
+-			uint32_t offs = 0;
+-
+-			while(offs < slave->mtd.size) {
+-				if (master->block_isbad(master,
+-							offs + slave->offset))
+-					slave->mtd.ecc_stats.badblocks++;
+-				offs += slave->mtd.erasesize;
+-			}
+-		}
+-
+-		if(parts[i].mtdp)
+-		{	/* store the object pointer (caller may or may not register it */
+-			*parts[i].mtdp = &slave->mtd;
+-			slave->registered = 0;
+-		}
+-		else
+-		{
+-			/* register our partition */
+-			add_mtd_device(&slave->mtd);
+-			slave->registered = 1;
++#endif /* CONFIG_MTD_SPLIT_ROOTFS */
++			ROOT_DEV = MKDEV(MTD_BLOCK_MAJOR, i);
+ 		}
+ 	}
+