diff options
| author | Minwoo Im <minwoo.im.dev@gmail.com> | 2018-07-02 16:46:43 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2018-07-09 17:07:53 +0200 |
| commit | 0da73d00ca111a6175825a00d94dbeae185f6d7e (patch) | |
| tree | 9885b0b946b98ecf4b4ea37d62b8e507df5f8a52 /block | |
| parent | paride: remove redundant variable n (diff) | |
| download | linux-0da73d00ca111a6175825a00d94dbeae185f6d7e.tar.xz linux-0da73d00ca111a6175825a00d94dbeae185f6d7e.zip | |
blk-mq: code clean-up by adding an API to clear set->mq_map
set->mq_map is now currently cleared if something goes wrong when
establishing a queue map in blk-mq-pci.c. It's also cleared before
updating a queue map in blk_mq_update_queue_map().
This patch provides an API to clear set->mq_map to make it clear.
Signed-off-by: Minwoo Im <minwoo.im.dev@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block')
| -rw-r--r-- | block/blk-mq-pci.c | 5 | ||||
| -rw-r--r-- | block/blk-mq.c | 4 | ||||
| -rw-r--r-- | block/blk-mq.h | 8 |
3 files changed, 12 insertions, 5 deletions
diff --git a/block/blk-mq-pci.c b/block/blk-mq-pci.c index e233996bb76f..db644ec624f5 100644 --- a/block/blk-mq-pci.c +++ b/block/blk-mq-pci.c @@ -17,6 +17,8 @@ #include <linux/pci.h> #include <linux/module.h> +#include "blk-mq.h" + /** * blk_mq_pci_map_queues - provide a default queue mapping for PCI device * @set: tagset to provide the mapping for @@ -48,8 +50,7 @@ int blk_mq_pci_map_queues(struct blk_mq_tag_set *set, struct pci_dev *pdev, fallback: WARN_ON_ONCE(set->nr_hw_queues > 1); - for_each_possible_cpu(cpu) - set->mq_map[cpu] = 0; + blk_mq_clear_mq_map(set); return 0; } EXPORT_SYMBOL_GPL(blk_mq_pci_map_queues); diff --git a/block/blk-mq.c b/block/blk-mq.c index 7c6ff13171ef..3cc074ae5c59 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -2683,7 +2683,6 @@ static int blk_mq_alloc_rq_maps(struct blk_mq_tag_set *set) static int blk_mq_update_queue_map(struct blk_mq_tag_set *set) { if (set->ops->map_queues) { - int cpu; /* * transport .map_queues is usually done in the following * way: @@ -2698,8 +2697,7 @@ static int blk_mq_update_queue_map(struct blk_mq_tag_set *set) * killing stale mapping since one CPU may not be mapped * to any hw queue. */ - for_each_possible_cpu(cpu) - set->mq_map[cpu] = 0; + blk_mq_clear_mq_map(set); return set->ops->map_queues(set); } else diff --git a/block/blk-mq.h b/block/blk-mq.h index 23659f41bf2c..bc2b24735ed4 100644 --- a/block/blk-mq.h +++ b/block/blk-mq.h @@ -202,4 +202,12 @@ static inline void blk_mq_put_driver_tag(struct request *rq) __blk_mq_put_driver_tag(hctx, rq); } +static inline void blk_mq_clear_mq_map(struct blk_mq_tag_set *set) +{ + int cpu; + + for_each_possible_cpu(cpu) + set->mq_map[cpu] = 0; +} + #endif |