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dm: remove dm_get_mapinfo

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Remove dm_get_mapinfo() because no target uses it.  Targets can allocate
per-bio data using ti->per_bio_data_size, this is much more flexible
than union map_info.

Leave union map_info only for the request-based multipath target's use.
Also delete the unused "unsigned long long ll" field of union map_info.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
This commit is contained in:
Mikulas Patocka 2014-03-03 17:43:31 -05:00 committed by Mike Snitzer
parent 473c36dfee
commit d70ab4fb72
2 changed files with 0 additions and 13 deletions
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10
drivers/md/dm.c
View file

@ -94,13 +94,6 @@ struct dm_rq_clone_bio_info {
struct bio clone;
};
union map_info *dm_get_mapinfo(struct bio *bio)
{
if (bio && bio->bi_private)
return &((struct dm_target_io *)bio->bi_private)->info;
return NULL;
}
union map_info *dm_get_rq_mapinfo(struct request *rq)
{
if (rq && rq->end_io_data)
@ -1195,7 +1188,6 @@ static struct dm_target_io *alloc_tio(struct clone_info *ci,
tio->io = ci->io;
tio->ti = ti;
memset(&tio->info, 0, sizeof(tio->info));
tio->target_bio_nr = target_bio_nr;
return tio;
@ -2873,8 +2865,6 @@ static const struct block_device_operations dm_blk_dops = {
.owner = THIS_MODULE
};
EXPORT_SYMBOL(dm_get_mapinfo);
/*
* module hooks
*/

3
include/linux/device-mapper.h
View file

@ -23,7 +23,6 @@ typedef enum { STATUSTYPE_INFO, STATUSTYPE_TABLE } status_type_t;
union map_info {
void *ptr;
unsigned long long ll;
};
/*
@ -291,7 +290,6 @@ struct dm_target_callbacks {
struct dm_target_io {
struct dm_io *io;
struct dm_target *ti;
union map_info info;
unsigned target_bio_nr;
struct bio clone;
};
@ -403,7 +401,6 @@ int dm_copy_name_and_uuid(struct mapped_device *md, char *name, char *uuid);
struct gendisk *dm_disk(struct mapped_device *md);
int dm_suspended(struct dm_target *ti);
int dm_noflush_suspending(struct dm_target *ti);
union map_info *dm_get_mapinfo(struct bio *bio);
union map_info *dm_get_rq_mapinfo(struct request *rq);
struct queue_limits *dm_get_queue_limits(struct mapped_device *md);