openwrt/target/linux/adm5120/patches-3.18/050-revert_rootfs_splits.patch

--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -29,11 +29,9 @@
 #include <linux/kmod.h>
 #include <linux/mtd/mtd.h>
 #include <linux/mtd/partitions.h>
-#include <linux/magic.h>
 #include <linux/err.h>
 
 #include "mtdcore.h"
-#include "mtdsplit/mtdsplit.h"
 
 #define MTD_ERASE_PARTIAL	0x8000 /* partition only covers parts of an erase block */
 
@@ -49,14 +47,13 @@ struct mtd_part {
 	struct list_head list;
 };
 
-static void mtd_partition_split(struct mtd_info *master, struct mtd_part *part);
-
 /*
  * Given a pointer to the MTD object in the mtd_part structure, we can retrieve
  * the pointer to that structure with this macro.
  */
 #define PART(x)  ((struct mtd_part *)(x))
 
+
 /*
  * MTD methods which simply translate the effective address and pass through
  * to the _real_ device.
@@ -520,12 +517,14 @@ static struct mtd_part *allocate_partiti
 	if (slave->offset == MTDPART_OFS_APPEND)
 		slave->offset = cur_offset;
 	if (slave->offset == MTDPART_OFS_NXTBLK) {
-		/* Round up to next erasesize */
-		slave->offset = mtd_roundup_to_eb(cur_offset, master);
-		if (slave->offset != cur_offset)
+		slave->offset = cur_offset;
+		if (mtd_mod_by_eb(cur_offset, master) != 0) {
+			/* Round up to next erasesize */
+			slave->offset = (mtd_div_by_eb(cur_offset, master) + 1) * master->erasesize;
 			printk(KERN_NOTICE "Moving partition %d: "
 			       "0x%012llx -> 0x%012llx\n", partno,
 			       (unsigned long long)cur_offset, (unsigned long long)slave->offset);
+		}
 	}
 	if (slave->offset == MTDPART_OFS_RETAIN) {
 		slave->offset = cur_offset;
@@ -629,10 +628,8 @@ out_register:
 	return slave;
 }
 
-
-static int
-__mtd_add_partition(struct mtd_info *master, const char *name,
-		    long long offset, long long length, bool dup_check)
+int mtd_add_partition(struct mtd_info *master, const char *name,
+		      long long offset, long long length)
 {
 	struct mtd_partition part;
 	struct mtd_part *p, *new;
@@ -664,24 +661,21 @@ __mtd_add_partition(struct mtd_info *mas
 	end = offset + length;
 
 	mutex_lock(&mtd_partitions_mutex);
-	if (dup_check) {
-		list_for_each_entry(p, &mtd_partitions, list)
-			if (p->master == master) {
-				if ((start >= p->offset) &&
-				    (start < (p->offset + p->mtd.size)))
-					goto err_inv;
-
-				if ((end >= p->offset) &&
-				    (end < (p->offset + p->mtd.size)))
-					goto err_inv;
-			}
-	}
+	list_for_each_entry(p, &mtd_partitions, list)
+		if (p->master == master) {
+			if ((start >= p->offset) &&
+			    (start < (p->offset + p->mtd.size)))
+				goto err_inv;
+
+			if ((end >= p->offset) &&
+			    (end < (p->offset + p->mtd.size)))
+				goto err_inv;
+		}
 
 	list_add(&new->list, &mtd_partitions);
 	mutex_unlock(&mtd_partitions_mutex);
 
 	add_mtd_device(&new->mtd);
-	mtd_partition_split(master, new);
 
 	return ret;
 err_inv:
@@ -691,12 +685,6 @@ err_inv:
 }
 EXPORT_SYMBOL_GPL(mtd_add_partition);
 
-int mtd_add_partition(struct mtd_info *master, const char *name,
-		      long long offset, long long length)
-{
-	return __mtd_add_partition(master, name, offset, length, true);
-}
-
 int mtd_del_partition(struct mtd_info *master, int partno)
 {
 	struct mtd_part *slave, *next;
@@ -720,166 +708,6 @@ int mtd_del_partition(struct mtd_info *m
 }
 EXPORT_SYMBOL_GPL(mtd_del_partition);
 
-static int
-run_parsers_by_type(struct mtd_part *slave, enum mtd_parser_type type)
-{
-	struct mtd_partition *parts;
-	int nr_parts;
-	int i;
-
-	nr_parts = parse_mtd_partitions_by_type(&slave->mtd, type, &parts,
-						NULL);
-	if (nr_parts <= 0)
-		return nr_parts;
-
-	if (WARN_ON(!parts))
-		return 0;
-
-	for (i = 0; i < nr_parts; i++) {
-		/* adjust partition offsets */
-		parts[i].offset += slave->offset;
-
-		__mtd_add_partition(slave->master,
-				    parts[i].name,
-				    parts[i].offset,
-				    parts[i].size,
-				    false);
-	}
-
-	kfree(parts);
-
-	return nr_parts;
-}
-
-static inline unsigned long
-mtd_pad_erasesize(struct mtd_info *mtd, int offset, int len)
-{
-	unsigned long mask = mtd->erasesize - 1;
-
-	len += offset & mask;
-	len = (len + mask) & ~mask;
-	len -= offset & mask;
-	return len;
-}
-
-static int split_squashfs(struct mtd_info *master, int offset, int *split_offset)
-{
-	size_t squashfs_len;
-	int len, ret;
-
-	ret = mtd_get_squashfs_len(master, offset, &squashfs_len);
-	if (ret)
-		return ret;
-
-	len = mtd_pad_erasesize(master, offset, squashfs_len);
-	*split_offset = offset + len;
-
-	return 0;
-}
-
-static void split_rootfs_data(struct mtd_info *master, struct mtd_part *part)
-{
-	unsigned int split_offset = 0;
-	unsigned int split_size;
-	int ret;
-
-	ret = split_squashfs(master, part->offset, &split_offset);
-	if (ret)
-		return;
-
-	if (split_offset <= 0)
-		return;
-
-	if (config_enabled(CONFIG_MTD_SPLIT_SQUASHFS_ROOT))
-		pr_err("Dedicated partitioner didn't create \"rootfs_data\" partition, please fill a bug report!\n");
-	else
-		pr_warn("Support for built-in \"rootfs_data\" splitter will be removed, please use CONFIG_MTD_SPLIT_SQUASHFS_ROOT\n");
-
-	split_size = part->mtd.size - (split_offset - part->offset);
-	printk(KERN_INFO "mtd: partition \"%s\" created automatically, ofs=0x%x, len=0x%x\n",
-		ROOTFS_SPLIT_NAME, split_offset, split_size);
-
-	__mtd_add_partition(master, ROOTFS_SPLIT_NAME, split_offset,
-			    split_size, false);
-}
-
-#define UBOOT_MAGIC	0x27051956
-
-static void split_uimage(struct mtd_info *master, struct mtd_part *part)
-{
-	struct {
-		__be32 magic;
-		__be32 pad[2];
-		__be32 size;
-	} hdr;
-	size_t len;
-
-	if (mtd_read(master, part->offset, sizeof(hdr), &len, (void *) &hdr))
-		return;
-
-	if (len != sizeof(hdr) || hdr.magic != cpu_to_be32(UBOOT_MAGIC))
-		return;
-
-	len = be32_to_cpu(hdr.size) + 0x40;
-	len = mtd_pad_erasesize(master, part->offset, len);
-	if (len + master->erasesize > part->mtd.size)
-		return;
-
-	if (config_enabled(CONFIG_MTD_SPLIT_UIMAGE_FW))
-		pr_err("Dedicated partitioner didn't split firmware partition, please fill a bug report!\n");
-	else
-		pr_warn("Support for built-in firmware splitter will be removed, please use CONFIG_MTD_SPLIT_UIMAGE_FW\n");
-
-	__mtd_add_partition(master, "rootfs", part->offset + len,
-			    part->mtd.size - len, false);
-}
-
-#ifdef CONFIG_MTD_SPLIT_FIRMWARE_NAME
-#define SPLIT_FIRMWARE_NAME	CONFIG_MTD_SPLIT_FIRMWARE_NAME
-#else
-#define SPLIT_FIRMWARE_NAME	"unused"
-#endif
-
-static void split_firmware(struct mtd_info *master, struct mtd_part *part)
-{
-	int ret;
-
-	ret = run_parsers_by_type(part, MTD_PARSER_TYPE_FIRMWARE);
-	if (ret > 0)
-		return;
-
-	if (config_enabled(CONFIG_MTD_UIMAGE_SPLIT))
-		split_uimage(master, part);
-}
-
-void __weak arch_split_mtd_part(struct mtd_info *master, const char *name,
-                                int offset, int size)
-{
-}
-
-static void mtd_partition_split(struct mtd_info *master, struct mtd_part *part)
-{
-	static int rootfs_found = 0;
-
-	if (rootfs_found)
-		return;
-
-	if (!strcmp(part->mtd.name, "rootfs")) {
-		int num = run_parsers_by_type(part, MTD_PARSER_TYPE_ROOTFS);
-
-		if (num <= 0 && config_enabled(CONFIG_MTD_ROOTFS_SPLIT))
-			split_rootfs_data(master, part);
-
-		rootfs_found = 1;
-	}
-
-	if (!strcmp(part->mtd.name, SPLIT_FIRMWARE_NAME) &&
-	    config_enabled(CONFIG_MTD_SPLIT_FIRMWARE))
-		split_firmware(master, part);
-
-	arch_split_mtd_part(master, part->mtd.name, part->offset,
-			    part->mtd.size);
-}
 /*
  * 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
@@ -909,7 +737,6 @@ int add_mtd_partitions(struct mtd_info *
 		mutex_unlock(&mtd_partitions_mutex);
 
 		add_mtd_device(&slave->mtd);
-		mtd_partition_split(master, slave);
 
 		cur_offset = slave->offset + slave->mtd.size;
 	}
@@ -939,30 +766,6 @@ static struct mtd_part_parser *get_parti
 
 #define put_partition_parser(p) do { module_put((p)->owner); } while (0)
 
-static struct mtd_part_parser *
-get_partition_parser_by_type(enum mtd_parser_type type,
-			     struct mtd_part_parser *start)
-{
-	struct mtd_part_parser *p, *ret = NULL;
-
-	spin_lock(&part_parser_lock);
-
-	p = list_prepare_entry(start, &part_parsers, list);
-	if (start)
-		put_partition_parser(start);
-
-	list_for_each_entry_continue(p, &part_parsers, list) {
-		if (p->type == type && try_module_get(p->owner)) {
-			ret = p;
-			break;
-		}
-	}
-
-	spin_unlock(&part_parser_lock);
-
-	return ret;
-}
-
 void register_mtd_parser(struct mtd_part_parser *p)
 {
 	spin_lock(&part_parser_lock);
@@ -1036,38 +839,6 @@ int parse_mtd_partitions(struct mtd_info
 	return ret;
 }
 
-int parse_mtd_partitions_by_type(struct mtd_info *master,
-				 enum mtd_parser_type type,
-				 struct mtd_partition **pparts,
-				 struct mtd_part_parser_data *data)
-{
-	struct mtd_part_parser *prev = NULL;
-	int ret = 0;
-
-	while (1) {
-		struct mtd_part_parser *parser;
-
-		parser = get_partition_parser_by_type(type, prev);
-		if (!parser)
-			break;
-
-		ret = (*parser->parse_fn)(master, pparts, data);
-
-		if (ret > 0) {
-			put_partition_parser(parser);
-			printk(KERN_NOTICE
-			       "%d %s partitions found on MTD device %s\n",
-			       ret, parser->name, master->name);
-			break;
-		}
-
-		prev = parser;
-	}
-
-	return ret;
-}
-EXPORT_SYMBOL_GPL(parse_mtd_partitions_by_type);
-
 int mtd_is_partition(const struct mtd_info *mtd)
 {
 	struct mtd_part *part;