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block: add a bdget_part helper

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All remaining callers of bdget() outside of fs/block_dev.c want to get a
reference to the struct block_device for a given struct hd_struct.  Add
a helper just for that and then mark bdget static.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig
2020-09-25 18:06:18 +02:00
committed by Jens Axboe
parent 155bd9d1ab
commit 10ed16662d
5 changed files with 11 additions and 13 deletions
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2
include/linux/blkdev.h
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@@ -2003,7 +2003,7 @@ void bd_abort_claiming(struct block_device *bdev, struct block_device *whole,
void blkdev_put(struct block_device *bdev, fmode_t mode);
struct block_device *I_BDEV(struct inode *inode);
struct block_device *bdget(dev_t);
struct block_device *bdget_part(struct hd_struct *part);
struct block_device *bdgrab(struct block_device *bdev);
void bdput(struct block_device *);