s2e/source/s2e-linux-kernel/linux-4.9.3/block/blk-mq-tag.c
/*
 * If a previously inactive queue goes active, bump the active user count.
 */
If a previously inactive queue goes active, bump the active user count.
If a previously inactive queue goes active bump the active user count .
bool __blk_mq_tag_busy(struct blk_mq_hw_ctx *hctx)
{
	if (!test_bit(BLK_MQ_S_TAG_ACTIVE, &hctx->state) &&
	    !test_and_set_bit(BLK_MQ_S_TAG_ACTIVE, &hctx->state))
		atomic_inc(&hctx->tags->active_queues);
	return true;
}
bool __blk_mq_tag_busy ( struct blk_mq_hw_ctx * hctx ) { if ( ! test_bit ( BLK_MQ_S_TAG_ACTIVE , & hctx -> state ) && ! test_and_set_bit ( BLK_MQ_S_TAG_ACTIVE , & hctx -> state ) ) atomic_inc ( & hctx -> tags -> active_queues ) ; return true ; }
If a previously inactive queue goes active, bump the active user count.
If a previously inactive queue goes active bump the active user count .