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block: make add_partition() return pointer to hd_struct

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Make add_partition() return pointer to the new hd_struct on success
and ERR_PTR() value on failure.  This change will be used to fix md
autodetection bug.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Neil Brown <neilb@suse.de>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
Tejun Heo
2008-11-10 15:29:58 +09:00
committed by Jens Axboe
parent eb60fa1066
commit ba32929a91
3 changed files with 19 additions and 17 deletions
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4
include/linux/genhd.h
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@ -522,7 +522,9 @@ extern char *disk_name (struct gendisk *hd, int partno, char *buf);
extern int disk_expand_part_tbl(struct gendisk *disk, int target);
extern int rescan_partitions(struct gendisk *disk, struct block_device *bdev);
extern int __must_check add_partition(struct gendisk *, int, sector_t, sector_t, int);
extern struct hd_struct * __must_check add_partition(struct gendisk *disk,
int partno, sector_t start,
sector_t len, int flags);
extern void delete_partition(struct gendisk *, int);
extern void printk_all_partitions(void);