From f19866e5cb04f8f007cb422132ea4611cdacc8e3 Mon Sep 17 00:00:00 2001
From: André Fabian Silva Delgado <emulatorman@parabola.nu>
Date: Thu, 8 Oct 2015 08:28:26 -0300
Subject: Linux-libre 4.2.3-gnu

---
 block/blk-mq-tag.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)

(limited to 'block/blk-mq-tag.h')

diff --git a/block/blk-mq-tag.h b/block/blk-mq-tag.h
index 75893a342..9eb2cf4f0 100644
--- a/block/blk-mq-tag.h
+++ b/block/blk-mq-tag.h
@@ -89,4 +89,16 @@ 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
-- 
cgit v1.2.3-54-g00ecf