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>

2 files changed, 1 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);