diff --git a/block/blk-core.c b/block/blk-core.c
index 61ba08c58b649b54fdfbc4e06c7e1b11b015512a..92baea07acbc662c3559f0f54360127f2ea7e2b3 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -1039,22 +1039,6 @@ static bool blk_rq_should_init_elevator(struct bio *bio)
 	return true;
 }
 
-/**
- * rq_ioc - determine io_context for request allocation
- * @bio: request being allocated is for this bio (can be %NULL)
- *
- * Determine io_context to use for request allocation for @bio.  May return
- * %NULL if %current->io_context doesn't exist.
- */
-static struct io_context *rq_ioc(struct bio *bio)
-{
-#ifdef CONFIG_BLK_CGROUP
-	if (bio && bio->bi_ioc)
-		return bio->bi_ioc;
-#endif
-	return current->io_context;
-}
-
 /**
  * __get_request - get a free request
  * @rl: request list to allocate from
diff --git a/block/blk.h b/block/blk.h
index f46c0ac8ae3d8e40b6f5d912dac97dc5676aaa48..9a716b5925a42ae72b019e887c29fb79d1a9cd59 100644
--- a/block/blk.h
+++ b/block/blk.h
@@ -263,6 +263,22 @@ void ioc_clear_queue(struct request_queue *q);
 
 int create_task_io_context(struct task_struct *task, gfp_t gfp_mask, int node);
 
+/**
+ * rq_ioc - determine io_context for request allocation
+ * @bio: request being allocated is for this bio (can be %NULL)
+ *
+ * Determine io_context to use for request allocation for @bio.  May return
+ * %NULL if %current->io_context doesn't exist.
+ */
+static inline struct io_context *rq_ioc(struct bio *bio)
+{
+#ifdef CONFIG_BLK_CGROUP
+	if (bio && bio->bi_ioc)
+		return bio->bi_ioc;
+#endif
+	return current->io_context;
+}
+
 /**
  * create_io_context - try to create task->io_context
  * @gfp_mask: allocation mask