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dm: change ->end_io calling convention

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Turn the error paramter into a pointer so that target drivers can change
the value, and make sure only DM_ENDIO_* values are returned from the
methods.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Christoph Hellwig 2017-06-03 09:38:03 +02:00 • committed by Jens Axboe
parent 846785e6a5
commit 1be5690984
10 changed files with 51 additions and 50 deletions
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2
include/linux/device-mapper.h
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@ -72,7 +72,7 @@ typedef void (*dm_release_clone_request_fn) (struct request *clone);
* 2 : The target wants to push back the io
*/
typedef int (*dm_endio_fn) (struct dm_target *ti,
struct bio *bio, int error);
struct bio *bio, int *error);
typedef int (*dm_request_endio_fn) (struct dm_target *ti,
struct request *clone, int error,
union map_info *map_context);