diff options
Diffstat (limited to 'target/linux/generic-2.6/patches-2.6.27/065-rootfs_split.patch')
| -rw-r--r-- | target/linux/generic-2.6/patches-2.6.27/065-rootfs_split.patch | 175 |
1 files changed, 88 insertions, 87 deletions
diff --git a/target/linux/generic-2.6/patches-2.6.27/065-rootfs_split.patch b/target/linux/generic-2.6/patches-2.6.27/065-rootfs_split.patch index 6fb86b9b4..c05d79181 100644 --- a/target/linux/generic-2.6/patches-2.6.27/065-rootfs_split.patch +++ b/target/linux/generic-2.6/patches-2.6.27/065-rootfs_split.patch @@ -373,51 +373,84 @@ return err; } -@@ -210,32 +246,109 @@ static int block2mtd_write(struct mtd_info *mtd, loff_t to, size_t len, +@@ -210,52 +246,29 @@ static int block2mtd_write(struct mtd_in static void block2mtd_sync(struct mtd_info *mtd) { struct block2mtd_dev *dev = mtd->priv; - sync_blockdev(dev->blkdev); -+ +- return; +-} +- +- +-static void block2mtd_free_device(struct block2mtd_dev *dev) +-{ +- if (!dev) +- return; +- +- kfree(dev->mtd.name); + +- if (dev->blkdev) { +- invalidate_mapping_pages(dev->blkdev->bd_inode->i_mapping, +- 0, -1); +- close_bdev_excl(dev->blkdev); +- } + read_lock(&dev->bdev_mutex); + if (dev->blkdev) + sync_blockdev(dev->blkdev); + read_unlock(&dev->bdev_mutex); -+ - return; + +- kfree(dev); ++ return; } +-/* FIXME: ensure that mtd->size % erase_size == 0 */ +-static struct block2mtd_dev *add_device(char *devname, int erase_size, const char *mtdname) +static int _open_bdev(struct block2mtd_dev *dev) -+{ -+ struct block_device *bdev; -+ -+ /* Get a handle on the device */ + { + struct block_device *bdev; +- struct block2mtd_dev *dev; +- struct mtd_partition *part; +- char *name; +- +- if (!devname) +- return NULL; +- +- dev = kzalloc(sizeof(struct block2mtd_dev), GFP_KERNEL); +- if (!dev) +- return NULL; + + /* Get a handle on the device */ +- bdev = open_bdev_excl(devname, O_RDWR, NULL); + bdev = open_bdev_excl(dev->devname, O_RDWR, NULL); -+#ifndef MODULE -+ if (IS_ERR(bdev)) { -+ -+ /* We might not have rootfs mounted at this point. Try -+ to resolve the device name by other means. */ -+ + #ifndef MODULE + if (IS_ERR(bdev)) { + + /* We might not have rootfs mounted at this point. Try + to resolve the device name by other means. */ + +- dev_t devt = name_to_dev_t(devname); + dev_t devt = name_to_dev_t(dev->devname); -+ if (devt) { -+ bdev = open_by_devnum(devt, FMODE_WRITE | FMODE_READ); -+ } -+ } -+#endif -+ -+ if (IS_ERR(bdev)) { + if (devt) { + bdev = open_by_devnum(devt, FMODE_WRITE | FMODE_READ); + } +@@ -263,17 +276,97 @@ static struct block2mtd_dev *add_device( + #endif + + if (IS_ERR(bdev)) { +- ERROR("error: cannot open device %s", devname); +- goto devinit_err; + ERROR("error: cannot open device %s", dev->devname); + return 1; -+ } -+ dev->blkdev = bdev; -+ -+ if (MAJOR(bdev->bd_dev) == MTD_BLOCK_MAJOR) { -+ ERROR("attempting to use an MTD device as a block device"); + } + dev->blkdev = bdev; + + if (MAJOR(bdev->bd_dev) == MTD_BLOCK_MAJOR) { + ERROR("attempting to use an MTD device as a block device"); +- goto devinit_err; + return 1; -+ } -+ + } + + return 0; +} + @@ -434,12 +467,12 @@ + dev->blkdev = NULL; +} + - static void block2mtd_free_device(struct block2mtd_dev *dev) - { - if (!dev) - return; - - kfree(dev->mtd.name); ++static void block2mtd_free_device(struct block2mtd_dev *dev) ++{ ++ if (!dev) ++ return; ++ ++ kfree(dev->mtd.name); + _close_bdev(dev); + kfree(dev); +} @@ -457,11 +490,7 @@ + + /* get the device number for the whole disk */ + devt = MKDEV(MAJOR(dev->blkdev->bd_dev), 0); - -- if (dev->blkdev) { -- invalidate_mapping_pages(dev->blkdev->bd_inode->i_mapping, -- 0, -1); -- close_bdev_excl(dev->blkdev); ++ + /* close the old block device */ + _close_bdev(dev); + @@ -471,70 +500,42 @@ + err = -EINVAL; + else { + err = rescan_partitions(bdev->bd_disk, bdev); - } ++ } + if (bdev) + close_bdev_excl(bdev); - -- kfree(dev); --} ++ + /* try to open the partition block device again */ + _open_bdev(dev); + write_unlock(&dev->bdev_mutex); - ++ + return err; +} - - /* FIXME: ensure that mtd->size % erase_size == 0 */ --static struct block2mtd_dev *add_device(char *devname, int erase_size, const char *mtdname) ++ ++/* FIXME: ensure that mtd->size % erase_size == 0 */ +static struct block2mtd_dev *add_device(char *devname, int erase_size, char *mtdname) - { -- struct block_device *bdev; - struct block2mtd_dev *dev; - struct mtd_partition *part; - char *name; -@@ -243,37 +356,17 @@ static struct block2mtd_dev *add_device(char *devname, int erase_size, const cha - if (!devname) - return NULL; - -- dev = kzalloc(sizeof(struct block2mtd_dev), GFP_KERNEL); ++{ ++ struct block2mtd_dev *dev; ++ struct mtd_partition *part; ++ char *name; ++ ++ if (!devname) ++ return NULL; ++ + dev = kzalloc(sizeof(struct block2mtd_dev) + strlen(devname) + 1, GFP_KERNEL); - if (!dev) - return NULL; - -- /* Get a handle on the device */ -- bdev = open_bdev_excl(devname, O_RDWR, NULL); --#ifndef MODULE -- if (IS_ERR(bdev)) { -- -- /* We might not have rootfs mounted at this point. Try -- to resolve the device name by other means. */ ++ if (!dev) ++ return NULL; ++ + strcpy(dev->devname, devname); - -- dev_t devt = name_to_dev_t(devname); -- if (devt) { -- bdev = open_by_devnum(devt, FMODE_WRITE | FMODE_READ); -- } -- } --#endif -- -- if (IS_ERR(bdev)) { -- ERROR("error: cannot open device %s", devname); ++ + if (_open_bdev(dev)) - goto devinit_err; -- } -- dev->blkdev = bdev; -- -- if (MAJOR(bdev->bd_dev) == MTD_BLOCK_MAJOR) { -- ERROR("attempting to use an MTD device as a block device"); -- goto devinit_err; -- } - ++ goto devinit_err; ++ mutex_init(&dev->write_mutex); + rwlock_init(&dev->bdev_mutex); if (!mtdname) mtdname = devname; -@@ -297,6 +408,7 @@ static struct block2mtd_dev *add_device( +@@ -297,6 +390,7 @@ static struct block2mtd_dev *add_device( dev->mtd.read = block2mtd_read; dev->mtd.priv = dev; dev->mtd.owner = THIS_MODULE; |