diff options
Diffstat (limited to 'block/blk-mq-tag.c')
| -rw-r--r-- | block/blk-mq-tag.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/block/blk-mq-tag.c b/block/blk-mq-tag.c index 72a2724a4eee..c43b97201161 100644 --- a/block/blk-mq-tag.c +++ b/block/blk-mq-tag.c @@ -86,6 +86,21 @@ static int __blk_mq_get_tag(struct blk_mq_alloc_data *data, return __sbitmap_queue_get(bt); } +unsigned long blk_mq_get_tags(struct blk_mq_alloc_data *data, int nr_tags, + unsigned int *offset) +{ + struct blk_mq_tags *tags = blk_mq_tags_from_data(data); + struct sbitmap_queue *bt = &tags->bitmap_tags; + unsigned long ret; + + if (data->shallow_depth ||data->flags & BLK_MQ_REQ_RESERVED || + data->hctx->flags & BLK_MQ_F_TAG_QUEUE_SHARED) + return 0; + ret = __sbitmap_queue_get_batch(bt, nr_tags, offset); + *offset += tags->nr_reserved_tags; + return ret; +} + unsigned int blk_mq_get_tag(struct blk_mq_alloc_data *data) { struct blk_mq_tags *tags = blk_mq_tags_from_data(data); |