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
This commit is contained in:
Gabor Juhos 2013-11-04 18:37:05 +00:00
parent 866dd2a378
commit 5dba0a237e
16 changed files with 94 additions and 58 deletions

View file

@ -35,16 +35,15 @@
depends on m
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -29,6 +29,8 @@
@@ -29,6 +29,7 @@
#include <linux/kmod.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
+#include <linux/root_dev.h>
+#include <linux/magic.h>
#include <linux/err.h>
#include "mtdcore.h"
@@ -45,13 +47,14 @@ struct mtd_part {
@@ -45,13 +46,14 @@ struct mtd_part {
struct list_head list;
};
@ -60,7 +59,7 @@
/*
* MTD methods which simply translate the effective address and pass through
* to the _real_ device.
@@ -533,8 +536,10 @@ out_register:
@@ -533,8 +535,10 @@ out_register:
return slave;
}
@ -73,7 +72,7 @@
{
struct mtd_partition part;
struct mtd_part *p, *new;
@@ -566,21 +571,24 @@ int mtd_add_partition(struct mtd_info *m
@@ -566,21 +570,24 @@ int mtd_add_partition(struct mtd_info *m
end = offset + length;
mutex_lock(&mtd_partitions_mutex);
@ -108,7 +107,7 @@
return ret;
err_inv:
@@ -590,6 +598,12 @@ err_inv:
@@ -590,6 +597,12 @@ err_inv:
}
EXPORT_SYMBOL_GPL(mtd_add_partition);
@ -121,7 +120,7 @@
int mtd_del_partition(struct mtd_info *master, int partno)
{
struct mtd_part *slave, *next;
@@ -613,6 +627,151 @@ int mtd_del_partition(struct mtd_info *m
@@ -613,6 +626,144 @@ int mtd_del_partition(struct mtd_info *m
}
EXPORT_SYMBOL_GPL(mtd_del_partition);
@ -252,13 +251,6 @@
+ if (!strcmp(part->mtd.name, "rootfs")) {
+ rootfs_found = 1;
+
+ if (config_enabled(CONFIG_MTD_ROOTFS_ROOT_DEV) &&
+ ROOT_DEV == 0) {
+ printk(KERN_NOTICE "mtd: partition \"rootfs\" "
+ "set to be root filesystem\n");
+ ROOT_DEV = MKDEV(MTD_BLOCK_MAJOR, part->mtd.index);
+ }
+
+ if (config_enabled(CONFIG_MTD_ROOTFS_SPLIT))
+ split_rootfs_data(master, part);
+ }
@ -273,7 +265,7 @@
/*
* 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
@@ -642,6 +801,7 @@ int add_mtd_partitions(struct mtd_info *
@@ -642,6 +793,7 @@ int add_mtd_partitions(struct mtd_info *
mutex_unlock(&mtd_partitions_mutex);
add_mtd_device(&slave->mtd);

View file

@ -11,7 +11,7 @@ Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -831,6 +831,30 @@ static struct mtd_part_parser *get_parti
@@ -823,6 +823,30 @@ static struct mtd_part_parser *get_parti
#define put_partition_parser(p) do { module_put((p)->owner); } while (0)
@ -42,7 +42,7 @@ Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
int register_mtd_parser(struct mtd_part_parser *p)
{
spin_lock(&part_parser_lock);
@@ -907,6 +931,38 @@ int parse_mtd_partitions(struct mtd_info
@@ -899,6 +923,38 @@ int parse_mtd_partitions(struct mtd_info
return ret;
}

View file

@ -1,6 +1,6 @@
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -627,6 +627,37 @@ int mtd_del_partition(struct mtd_info *m
@@ -626,6 +626,37 @@ int mtd_del_partition(struct mtd_info *m
}
EXPORT_SYMBOL_GPL(mtd_del_partition);
@ -38,7 +38,7 @@
static inline unsigned long
mtd_pad_erasesize(struct mtd_info *mtd, int offset, int len)
{
@@ -686,6 +717,10 @@ static void split_rootfs_data(struct mtd
@@ -685,6 +716,10 @@ static void split_rootfs_data(struct mtd
unsigned int split_size;
int ret;
@ -49,7 +49,7 @@
ret = split_squashfs(master, part->offset, &split_offset);
if (ret)
return;
@@ -735,6 +770,12 @@ static void split_uimage(struct mtd_info
@@ -734,6 +769,12 @@ static void split_uimage(struct mtd_info
static void split_firmware(struct mtd_info *master, struct mtd_part *part)
{

View file

@ -1,6 +1,6 @@
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -34,6 +34,7 @@
@@ -33,6 +33,7 @@
#include <linux/err.h>
#include "mtdcore.h"
@ -8,7 +8,7 @@
/* Our partition linked list */
static LIST_HEAD(mtd_partitions);
@@ -669,43 +670,16 @@ mtd_pad_erasesize(struct mtd_info *mtd,
@@ -668,43 +669,16 @@ mtd_pad_erasesize(struct mtd_info *mtd,
return len;
}

View file

@ -1,6 +1,6 @@
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -435,14 +435,12 @@ static struct mtd_part *allocate_partiti
@@ -434,14 +434,12 @@ static struct mtd_part *allocate_partiti
if (slave->offset == MTDPART_OFS_APPEND)
slave->offset = cur_offset;
if (slave->offset == MTDPART_OFS_NXTBLK) {
@ -18,7 +18,7 @@
}
if (slave->offset == MTDPART_OFS_RETAIN) {
slave->offset = cur_offset;
@@ -995,6 +993,24 @@ int mtd_is_partition(const struct mtd_in
@@ -987,6 +985,24 @@ int mtd_is_partition(const struct mtd_in
}
EXPORT_SYMBOL_GPL(mtd_is_partition);

View file

@ -1,6 +1,6 @@
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -36,6 +36,8 @@
@@ -35,6 +35,8 @@
#include "mtdcore.h"
#include "mtdsplit.h"
@ -9,7 +9,7 @@
/* Our partition linked list */
static LIST_HEAD(mtd_partitions);
static DEFINE_MUTEX(mtd_partitions_mutex);
@@ -232,13 +234,60 @@ static int part_erase(struct mtd_info *m
@@ -231,13 +233,60 @@ static int part_erase(struct mtd_info *m
struct mtd_part *part = PART(mtd);
int ret;
@ -70,7 +70,7 @@
return ret;
}
@@ -246,7 +295,25 @@ void mtd_erase_callback(struct erase_inf
@@ -245,7 +294,25 @@ void mtd_erase_callback(struct erase_inf
{
if (instr->mtd->_erase == part_erase) {
struct mtd_part *part = PART(instr->mtd);
@ -96,7 +96,7 @@
if (instr->fail_addr != MTD_FAIL_ADDR_UNKNOWN)
instr->fail_addr -= part->offset;
instr->addr -= part->offset;
@@ -504,18 +571,24 @@ static struct mtd_part *allocate_partiti
@@ -503,18 +570,24 @@ static struct mtd_part *allocate_partiti
if ((slave->mtd.flags & MTD_WRITEABLE) &&
mtd_mod_by_eb(slave->offset, &slave->mtd)) {
/* Doesn't start on a boundary of major erase size */

View file

@ -1,6 +1,6 @@
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -332,7 +332,14 @@ static int part_lock(struct mtd_info *mt
@@ -331,7 +331,14 @@ static int part_lock(struct mtd_info *mt
static int part_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
{
struct mtd_part *part = PART(mtd);

View file

@ -0,0 +1,26 @@
--- 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>
@@ -408,6 +409,15 @@ 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:

View file

@ -35,16 +35,15 @@
depends on m
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -29,6 +29,8 @@
@@ -29,6 +29,7 @@
#include <linux/kmod.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
+#include <linux/root_dev.h>
+#include <linux/magic.h>
#include <linux/err.h>
#include "mtdcore.h"
@@ -45,13 +47,14 @@ struct mtd_part {
@@ -45,13 +46,14 @@ struct mtd_part {
struct list_head list;
};
@ -60,7 +59,7 @@
/*
* MTD methods which simply translate the effective address and pass through
* to the _real_ device.
@@ -534,8 +537,10 @@ out_register:
@@ -534,8 +536,10 @@ out_register:
return slave;
}
@ -73,7 +72,7 @@
{
struct mtd_partition part;
struct mtd_part *p, *new;
@@ -567,21 +572,24 @@ int mtd_add_partition(struct mtd_info *m
@@ -567,21 +571,24 @@ int mtd_add_partition(struct mtd_info *m
end = offset + length;
mutex_lock(&mtd_partitions_mutex);
@ -108,7 +107,7 @@
return ret;
err_inv:
@@ -591,6 +599,12 @@ err_inv:
@@ -591,6 +598,12 @@ err_inv:
}
EXPORT_SYMBOL_GPL(mtd_add_partition);
@ -121,7 +120,7 @@
int mtd_del_partition(struct mtd_info *master, int partno)
{
struct mtd_part *slave, *next;
@@ -614,6 +628,151 @@ int mtd_del_partition(struct mtd_info *m
@@ -614,6 +627,144 @@ int mtd_del_partition(struct mtd_info *m
}
EXPORT_SYMBOL_GPL(mtd_del_partition);
@ -252,13 +251,6 @@
+ if (!strcmp(part->mtd.name, "rootfs")) {
+ rootfs_found = 1;
+
+ if (config_enabled(CONFIG_MTD_ROOTFS_ROOT_DEV) &&
+ ROOT_DEV == 0) {
+ printk(KERN_NOTICE "mtd: partition \"rootfs\" "
+ "set to be root filesystem\n");
+ ROOT_DEV = MKDEV(MTD_BLOCK_MAJOR, part->mtd.index);
+ }
+
+ if (config_enabled(CONFIG_MTD_ROOTFS_SPLIT))
+ split_rootfs_data(master, part);
+ }
@ -273,7 +265,7 @@
/*
* 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
@@ -643,6 +802,7 @@ int add_mtd_partitions(struct mtd_info *
@@ -643,6 +794,7 @@ int add_mtd_partitions(struct mtd_info *
mutex_unlock(&mtd_partitions_mutex);
add_mtd_device(&slave->mtd);

View file

@ -11,7 +11,7 @@ Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -832,6 +832,30 @@ static struct mtd_part_parser *get_parti
@@ -824,6 +824,30 @@ static struct mtd_part_parser *get_parti
#define put_partition_parser(p) do { module_put((p)->owner); } while (0)
@ -42,7 +42,7 @@ Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
int register_mtd_parser(struct mtd_part_parser *p)
{
spin_lock(&part_parser_lock);
@@ -908,6 +932,38 @@ int parse_mtd_partitions(struct mtd_info
@@ -900,6 +924,38 @@ int parse_mtd_partitions(struct mtd_info
return ret;
}

View file

@ -1,6 +1,6 @@
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -628,6 +628,37 @@ int mtd_del_partition(struct mtd_info *m
@@ -627,6 +627,37 @@ int mtd_del_partition(struct mtd_info *m
}
EXPORT_SYMBOL_GPL(mtd_del_partition);
@ -38,7 +38,7 @@
static inline unsigned long
mtd_pad_erasesize(struct mtd_info *mtd, int offset, int len)
{
@@ -687,6 +718,10 @@ static void split_rootfs_data(struct mtd
@@ -686,6 +717,10 @@ static void split_rootfs_data(struct mtd
unsigned int split_size;
int ret;
@ -49,7 +49,7 @@
ret = split_squashfs(master, part->offset, &split_offset);
if (ret)
return;
@@ -736,6 +771,12 @@ static void split_uimage(struct mtd_info
@@ -735,6 +770,12 @@ static void split_uimage(struct mtd_info
static void split_firmware(struct mtd_info *master, struct mtd_part *part)
{

View file

@ -1,6 +1,6 @@
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -34,6 +34,7 @@
@@ -33,6 +33,7 @@
#include <linux/err.h>
#include "mtdcore.h"
@ -8,7 +8,7 @@
/* Our partition linked list */
static LIST_HEAD(mtd_partitions);
@@ -670,43 +671,16 @@ mtd_pad_erasesize(struct mtd_info *mtd,
@@ -669,43 +670,16 @@ mtd_pad_erasesize(struct mtd_info *mtd,
return len;
}

View file

@ -1,6 +1,6 @@
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -435,14 +435,12 @@ static struct mtd_part *allocate_partiti
@@ -434,14 +434,12 @@ static struct mtd_part *allocate_partiti
if (slave->offset == MTDPART_OFS_APPEND)
slave->offset = cur_offset;
if (slave->offset == MTDPART_OFS_NXTBLK) {
@ -18,7 +18,7 @@
}
if (slave->offset == MTDPART_OFS_RETAIN) {
slave->offset = cur_offset;
@@ -996,6 +994,24 @@ int mtd_is_partition(const struct mtd_in
@@ -988,6 +986,24 @@ int mtd_is_partition(const struct mtd_in
}
EXPORT_SYMBOL_GPL(mtd_is_partition);

View file

@ -1,6 +1,6 @@
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -36,6 +36,8 @@
@@ -35,6 +35,8 @@
#include "mtdcore.h"
#include "mtdsplit.h"
@ -9,7 +9,7 @@
/* Our partition linked list */
static LIST_HEAD(mtd_partitions);
static DEFINE_MUTEX(mtd_partitions_mutex);
@@ -232,13 +234,60 @@ static int part_erase(struct mtd_info *m
@@ -231,13 +233,60 @@ static int part_erase(struct mtd_info *m
struct mtd_part *part = PART(mtd);
int ret;
@ -70,7 +70,7 @@
return ret;
}
@@ -246,7 +295,25 @@ void mtd_erase_callback(struct erase_inf
@@ -245,7 +294,25 @@ void mtd_erase_callback(struct erase_inf
{
if (instr->mtd->_erase == part_erase) {
struct mtd_part *part = PART(instr->mtd);
@ -96,7 +96,7 @@
if (instr->fail_addr != MTD_FAIL_ADDR_UNKNOWN)
instr->fail_addr -= part->offset;
instr->addr -= part->offset;
@@ -504,18 +571,24 @@ static struct mtd_part *allocate_partiti
@@ -503,18 +570,24 @@ static struct mtd_part *allocate_partiti
if ((slave->mtd.flags & MTD_WRITEABLE) &&
mtd_mod_by_eb(slave->offset, &slave->mtd)) {
/* Doesn't start on a boundary of major erase size */

View file

@ -1,6 +1,6 @@
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -332,7 +332,14 @@ static int part_lock(struct mtd_info *mt
@@ -331,7 +331,14 @@ static int part_lock(struct mtd_info *mt
static int part_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
{
struct mtd_part *part = PART(mtd);

View file

@ -0,0 +1,26 @@
--- 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: