These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / block / blk-mq-tag.h

diff --git a/kernel/block/blk-mq-tag.h b/kernel/block/blk-mq-tag.h
index 90767b3..d468a79 100644 (file)
--- a/kernel/block/blk-mq-tag.h
+++ b/kernel/block/blk-mq-tag.h
@@ -44,6 +44,7 @@ struct blk_mq_tags {
        struct list_head page_list;
 
        int alloc_policy;
+       cpumask_var_t cpumask;
 };
 
 
@@ -57,6 +58,8 @@ 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);
 extern int blk_mq_tag_update_depth(struct blk_mq_tags *tags, unsigned int depth);
 extern void blk_mq_tag_wakeup_all(struct blk_mq_tags *tags, bool);
+void blk_mq_queue_tag_busy_iter(struct request_queue *q, busy_iter_fn *fn,
+               void *priv);
 
 enum {
        BLK_MQ_TAG_CACHE_MIN    = 1,
@@ -88,4 +91,16 @@ static inline void blk_mq_tag_idle(struct blk_mq_hw_ctx *hctx)
        __blk_mq_tag_idle(hctx);
 }
 
+/*
+ * This helper should only be used for flush request to share tag
+ * with the request cloned from, and both the two requests can't be
+ * in flight at the same time. The caller has to make sure the tag
+ * can't be freed.
+ */
+static inline void blk_mq_tag_set_rq(struct blk_mq_hw_ctx *hctx,
+               unsigned int tag, struct request *rq)
+{
+       hctx->tags->rqs[tag] = rq;
+}
+
 #endif