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[kernel] update to 2.6.25.20, 2.6.26.8, 2.6.27.5 and refresh patches

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* based on a patch by Hauke Mehrtens
 * closes #4193



git-svn-id: svn://svn.openwrt.org/openwrt/trunk@13192 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
juhosg
2008-11-12 17:49:01 +00:00
parent a1b7c85cd4
commit d8297bb0a4
42 changed files with 164 additions and 426 deletions
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175
target/linux/generic-2.6/patches-2.6.27/065-rootfs_split.patch
View File

@@ -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;