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| author | Mike Snitzer <snitzer@redhat.com> | 2022-03-10 19:45:58 +0300 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2022-03-10 21:44:56 +0300 |
| commit | b7f8dff09827c96032c34a945ee7757e394b5952 (patch) | |
| tree | 1314942282a48a20d486629cc574360e0a3996ed /drivers/md/dm-core.h | |
| parent | a92512819b1f2971674675edbf695b717d43629c (diff) | |
| download | linux-b7f8dff09827c96032c34a945ee7757e394b5952.tar.xz | |
dm: simplify dm_sumbit_bio_remap interface
Remove the from_wq argument from dm_sumbit_bio_remap(). Eliminates the
need for dm_sumbit_bio_remap() callers to know whether they are
calling for a workqueue or from the original dm_submit_bio().
Add map_task to dm_io struct, record the map_task in alloc_io and
clear it after all target ->map() calls have completed. Update
dm_sumbit_bio_remap to check if 'current' matches io->map_task rather
than rely on passed 'from_rq' argument.
This change really simplifies the chore of porting each DM target to
using dm_sumbit_bio_remap() because there is no longer the risk of
programming error by not completely knowing all the different contexts
a particular method that calls dm_sumbit_bio_remap() might be used in.
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md/dm-core.h')
| -rw-r--r-- | drivers/md/dm-core.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/md/dm-core.h b/drivers/md/dm-core.h index 8cc03c0c262e..8d3d11887343 100644 --- a/drivers/md/dm-core.h +++ b/drivers/md/dm-core.h @@ -237,6 +237,7 @@ struct dm_io { unsigned long start_time; void *data; struct hlist_node node; + struct task_struct *map_task; spinlock_t endio_lock; struct dm_stats_aux stats_aux; /* last member of dm_target_io is 'struct bio' */ |