diff options
authorSam Bradshaw <>2014-05-23 13:30:16 -0600
committerJens Axboe <>2014-05-23 13:30:16 -0600
commitedf866b3805c5651bf7d035b72dc0190cb6ff4a7 (patch)
parent07068d5b8ed8fa6759b2826ba9197e49b69a1fc3 (diff)
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 <> Signed-off-by: Matias Bjørling <> Signed-off-by: Jens Axboe <>
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);
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