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blk: centralize non-request unplug handling.

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Both md and umem has similar code for getting notified on an
blk_finish_plug event.
Centralize this code in block/ and allow each driver to
provide its distinctive difference.

Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
NeilBrown
2012-07-31 09:08:14 +02:00
committed by Jens Axboe
parent 0021b7bc04
commit 9cbb175088
5 changed files with 49 additions and 83 deletions
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8
drivers/md/md.h
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@@ -627,6 +627,12 @@ extern struct bio *bio_clone_mddev(struct bio *bio, gfp_t gfp_mask,
struct mddev *mddev);
extern struct bio *bio_alloc_mddev(gfp_t gfp_mask, int nr_iovecs,
struct mddev *mddev);
extern int mddev_check_plugged(struct mddev *mddev);
extern void md_trim_bio(struct bio *bio, int offset, int size);
extern void md_unplug(struct blk_plug_cb *cb);
static inline int mddev_check_plugged(struct mddev *mddev)
{
return !!blk_check_plugged(md_unplug, mddev,
sizeof(struct blk_plug_cb));
}
#endif /* _MD_MD_H */