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| author | Christoph Hellwig <hch@lst.de> | 2017-08-23 19:10:30 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2017-08-23 12:49:52 -0600 |
| commit | 807d4af2f64ed79fdbb28e582e330be3dbe10d23 (patch) | |
| tree | 11ed994bb09f7739c8d746f8d39b82df07aa7740 /block/blk.h | |
| parent | de65b0123216a8e1dbe3ca1eb20a45572b9e71d9 (diff) | |
| download | lwn-807d4af2f64ed79fdbb28e582e330be3dbe10d23.tar.gz lwn-807d4af2f64ed79fdbb28e582e330be3dbe10d23.zip | |
block: add a __disk_get_part helper
This helper allows looking up a partion under RCU protection without
grabbing a reference to it.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk.h')
| -rw-r--r-- | block/blk.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/block/blk.h b/block/blk.h index 3a3d715bd725..fde8b351c166 100644 --- a/block/blk.h +++ b/block/blk.h @@ -204,6 +204,8 @@ static inline void elv_deactivate_rq(struct request_queue *q, struct request *rq e->type->ops.sq.elevator_deactivate_req_fn(q, rq); } +struct hd_struct *__disk_get_part(struct gendisk *disk, int partno); + #ifdef CONFIG_FAIL_IO_TIMEOUT int blk_should_fake_timeout(struct request_queue *); ssize_t part_timeout_show(struct device *, struct device_attribute *, char *); |