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| author | Tejun Heo <tj@kernel.org> | 2010-11-13 11:55:17 +0100 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2010-11-13 11:55:17 +0100 |
| commit | e09b457bdb7e8d23fc54dcef0930ac697d8de895 (patch) | |
| tree | 41035bf61a8acb08292d01c0f66e5450502688af /include | |
| parent | 37004c42f7240035bc2726c340c4efa726b4818e (diff) | |
| download | kernel_samsung_smdk4412-e09b457bdb7e8d23fc54dcef0930ac697d8de895.zip kernel_samsung_smdk4412-e09b457bdb7e8d23fc54dcef0930ac697d8de895.tar.gz kernel_samsung_smdk4412-e09b457bdb7e8d23fc54dcef0930ac697d8de895.tar.bz2 | |
block: simplify holder symlink handling
Code to manage symlinks in /sys/block/*/{holders|slaves} are overly
complex with multiple holder considerations, redundant extra
references to all involved kobjects, unused generic kobject holder
support and unnecessary mixup with bd_claim/release functionalities.
Strip it down to what's necessary (single gendisk holder) and make it
use a separate interface. This is a step for cleaning up
bd_claim/release. This patch makes dm-table slightly more complex but
it will be simplified again with further changes.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Neil Brown <neilb@suse.de>
Acked-by: Mike Snitzer <snitzer@redhat.com>
Cc: dm-devel@redhat.com
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/fs.h | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/include/linux/fs.h b/include/linux/fs.h index 334d68a..66b7f2c 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -663,7 +663,7 @@ struct block_device { void * bd_holder; int bd_holders; #ifdef CONFIG_SYSFS - struct list_head bd_holder_list; + struct gendisk * bd_holder_disk; /* for sysfs slave linkng */ #endif struct block_device * bd_contains; unsigned bd_block_size; @@ -2042,11 +2042,17 @@ extern int blkdev_put(struct block_device *, fmode_t); extern int bd_claim(struct block_device *, void *); extern void bd_release(struct block_device *); #ifdef CONFIG_SYSFS -extern int bd_claim_by_disk(struct block_device *, void *, struct gendisk *); -extern void bd_release_from_disk(struct block_device *, struct gendisk *); +extern int bd_link_disk_holder(struct block_device *bdev, struct gendisk *disk); +extern void bd_unlink_disk_holder(struct block_device *bdev); #else -#define bd_claim_by_disk(bdev, holder, disk) bd_claim(bdev, holder) -#define bd_release_from_disk(bdev, disk) bd_release(bdev) +static inline int bd_link_disk_holder(struct block_device *bdev, + struct gendisk *disk) +{ + return 0; +} +static inline void bd_unlink_disk_holder(struct block_device *bdev) +{ +} #endif #endif |