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dm: per target unplug callback support

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Add per-target unplug callback support.

Cc: linux-raid@vger.kernel.org
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Jonathan Brassow <jbrassow@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
This commit is contained in:
NeilBrown
2011-01-13 20:00:02 +00:00
committed by Alasdair G Kergon
parent 9d357b0787
commit 99d03c141b
2 changed files with 6 additions and 0 deletions
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include/linux/device-mapper.h
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@ -197,6 +197,7 @@ struct dm_target {
struct dm_target_callbacks {
struct list_head list;
int (*congested_fn) (struct dm_target_callbacks *, int);
void (*unplug_fn)(struct dm_target_callbacks *);
};
int dm_register_target(struct target_type *t);