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-rw-r--r--block/genhd.c18
1 files changed, 9 insertions, 9 deletions
diff --git a/block/genhd.c b/block/genhd.c
index 8bd4ef2..35415810 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -28,10 +28,10 @@ struct kobject *block_depr;
/* for extended dynamic devt allocation, currently only one major is used */
#define NR_EXT_DEVT (1 << MINORBITS)
-/* For extended devt allocation. ext_devt_mutex prevents look up
+/* For extended devt allocation. ext_devt_lock prevents look up
* results from going away underneath its user.
*/
-static DEFINE_MUTEX(ext_devt_mutex);
+static DEFINE_SPINLOCK(ext_devt_lock);
static DEFINE_IDR(ext_devt_idr);
static struct device_type disk_type;
@@ -421,13 +421,13 @@ int blk_alloc_devt(struct hd_struct *part, dev_t *devt)
do {
if (!idr_pre_get(&ext_devt_idr, GFP_KERNEL))
return -ENOMEM;
- mutex_lock(&ext_devt_mutex);
+ spin_lock(&ext_devt_lock);
rc = idr_get_new(&ext_devt_idr, part, &idx);
if (!rc && idx >= NR_EXT_DEVT) {
idr_remove(&ext_devt_idr, idx);
rc = -EBUSY;
}
- mutex_unlock(&ext_devt_mutex);
+ spin_unlock(&ext_devt_lock);
} while (rc == -EAGAIN);
if (rc)
@@ -454,9 +454,9 @@ void blk_free_devt(dev_t devt)
return;
if (MAJOR(devt) == BLOCK_EXT_MAJOR) {
- mutex_lock(&ext_devt_mutex);
+ spin_lock(&ext_devt_lock);
idr_remove(&ext_devt_idr, blk_mangle_minor(MINOR(devt)));
- mutex_unlock(&ext_devt_mutex);
+ spin_unlock(&ext_devt_lock);
}
}
@@ -663,7 +663,6 @@ void del_gendisk(struct gendisk *disk)
if (!sysfs_deprecated)
sysfs_remove_link(block_depr, dev_name(disk_to_dev(disk)));
device_del(disk_to_dev(disk));
- blk_free_devt(disk_to_dev(disk)->devt);
}
EXPORT_SYMBOL(del_gendisk);
@@ -688,13 +687,13 @@ struct gendisk *get_gendisk(dev_t devt, int *partno)
} else {
struct hd_struct *part;
- mutex_lock(&ext_devt_mutex);
+ spin_lock(&ext_devt_lock);
part = idr_find(&ext_devt_idr, blk_mangle_minor(MINOR(devt)));
if (part && get_disk(part_to_disk(part))) {
*partno = part->partno;
disk = part_to_disk(part);
}
- mutex_unlock(&ext_devt_mutex);
+ spin_unlock(&ext_devt_lock);
}
return disk;
@@ -1102,6 +1101,7 @@ static void disk_release(struct device *dev)
{
struct gendisk *disk = dev_to_disk(dev);
+ blk_free_devt(dev->devt);
disk_release_events(disk);
kfree(disk->random);
disk_replace_part_tbl(disk, NULL);