diff options
| author |   NeilBrown <neilb@suse.com> | 2017-11-22 14:25:18 +1100 |
|---|---|---|
| committer |   Mike Snitzer <snitzer@redhat.com> | 2017-12-13 12:15:58 -0500 |
| commit | f31c21e4365c02ccf7226c33ea978cd5dbfc351e (patch) | |
| tree | 26dd1f16a7996339e872af8bb3702d7c713e02af /include/linux/device-mapper.h | |
| parent | dm: ensure bio submission follows a depth-first tree walk (diff) | |
| download | wireguard-linux-f31c21e4365c02ccf7226c33ea978cd5dbfc351e.tar.xz wireguard-linux-f31c21e4365c02ccf7226c33ea978cd5dbfc351e.zip | |
dm: remove unused 'num_write_bios' target interface
No DM target provides num_write_bios and none has since dm-cache's
brief use in 2013.
Having the possibility of num_write_bios > 1 complicates bio
allocation. So remove the interface and assume there is only one bio
needed.
If a target ever needs more, it must provide a suitable bioset and
allocate itself based on its particular needs.
Signed-off-by: NeilBrown <neilb@suse.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'include/linux/device-mapper.h')
| -rw-r--r-- | include/linux/device-mapper.h | 15 |
1 files changed, 0 insertions, 15 deletions
diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h index a5538433c927..5a68b366e664 100644 --- a/include/linux/device-mapper.h +++ b/include/linux/device-mapper.h @@ -221,14 +221,6 @@ struct target_type { #define dm_target_is_wildcard(type) ((type)->features & DM_TARGET_WILDCARD) /* - * Some targets need to be sent the same WRITE bio severals times so - * that they can send copies of it to different devices. This function - * examines any supplied bio and returns the number of copies of it the - * target requires. - */ -typedef unsigned (*dm_num_write_bios_fn) (struct dm_target *ti, struct bio *bio); - -/* * A target implements own bio data integrity. */ #define DM_TARGET_INTEGRITY 0x00000010 @@ -291,13 +283,6 @@ struct dm_target { */ unsigned per_io_data_size; - /* - * If defined, this function is called to find out how many - * duplicate bios should be sent to the target when writing - * data. - */ - dm_num_write_bios_fn num_write_bios; - /* target specific data */ void *private; |