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| author | Sam Bradshaw <sbradshaw@micron.com> | 2014-05-23 13:30:16 -0600 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2014-05-23 13:30:16 -0600 |
| commit | edf866b3805c5651bf7d035b72dc0190cb6ff4a7 (patch) | |
| tree | 92396c09eb02e704abee45c72988b2616b31b0de | |
| parent | 07068d5b8ed8fa6759b2826ba9197e49b69a1fc3 (diff) | |
| download | talos-obmc-linux-edf866b3805c5651bf7d035b72dc0190cb6ff4a7.tar.gz talos-obmc-linux-edf866b3805c5651bf7d035b72dc0190cb6ff4a7.zip | |
blk-mq: export blk_mq_tag_busy_iter
Export the blk-mq in-flight tag iterator for driver consumption.
This is particularly useful in exception paths or SRSI where
in-flight IOs need to be cancelled and/or reissued. The NVMe driver
conversion will use this.
Signed-off-by: Sam Bradshaw <sbradshaw@micron.com>
Signed-off-by: Matias Bjørling <m@bjorling.me>
Signed-off-by: Jens Axboe <axboe@fb.com>
| -rw-r--r-- | block/blk-mq-tag.c | 1 | ||||
| -rw-r--r-- | block/blk-mq-tag.h | 1 | ||||
| -rw-r--r-- | include/linux/blk-mq.h | 1 |
3 files changed, 2 insertions, 1 deletions
diff --git a/block/blk-mq-tag.c b/block/blk-mq-tag.c index f6dea968b710..05e2baf4fa0d 100644 --- a/block/blk-mq-tag.c +++ b/block/blk-mq-tag.c @@ -400,6 +400,7 @@ void blk_mq_tag_busy_iter(struct blk_mq_tags *tags, fn(data, tag_map); kfree(tag_map); } +EXPORT_SYMBOL(blk_mq_tag_busy_iter); static unsigned int bt_unused_tags(struct blk_mq_bitmap_tags *bt) { diff --git a/block/blk-mq-tag.h b/block/blk-mq-tag.h index e7ff5ceeeb97..2e5e6872d089 100644 --- a/block/blk-mq-tag.h +++ b/block/blk-mq-tag.h @@ -51,7 +51,6 @@ extern void blk_mq_free_tags(struct blk_mq_tags *tags); extern unsigned int blk_mq_get_tag(struct blk_mq_hw_ctx *hctx, unsigned int *last_tag, gfp_t gfp, bool reserved); extern void blk_mq_wait_for_tags(struct blk_mq_hw_ctx *hctx, bool reserved); extern void blk_mq_put_tag(struct blk_mq_hw_ctx *hctx, unsigned int tag, unsigned int *last_tag); -extern void blk_mq_tag_busy_iter(struct blk_mq_tags *tags, void (*fn)(void *data, unsigned long *), void *data); extern bool blk_mq_has_free_tags(struct blk_mq_tags *tags); extern ssize_t blk_mq_tag_sysfs_show(struct blk_mq_tags *tags, char *page); extern void blk_mq_tag_init_last_tag(struct blk_mq_tags *tags, unsigned int *last_tag); diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h index 4d2800567aad..f76bb18350af 100644 --- a/include/linux/blk-mq.h +++ b/include/linux/blk-mq.h @@ -181,6 +181,7 @@ void blk_mq_stop_hw_queues(struct request_queue *q); void blk_mq_start_hw_queues(struct request_queue *q); void blk_mq_start_stopped_hw_queues(struct request_queue *q, bool async); void blk_mq_delay_queue(struct blk_mq_hw_ctx *hctx, unsigned long msecs); +void blk_mq_tag_busy_iter(struct blk_mq_tags *tags, void (*fn)(void *data, unsigned long *), void *data); /* * Driver command data is immediately after the request. So subtract request |
