linux-kernel - [block:for-3.14/core] blk-mq: Compile fix for null

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Date:	Thu, 9 Jan 2014 10:54:17 -0800
From:	Muthu Kumar <muthu.lkml@...il.com>
To:	Jens Axboe <axboe@...nel.dk>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: [block:for-3.14/core] blk-mq: Compile fix for null_blk

Jens,

Compiling null_blk.ko failed with error that blk_mq_free_queue() was
defined implicitly. So, moved the declaration from block/blk-mq.h to
include/linux/blk-mq.h and exported it.

Signed-off-by: Muthukumar Ratty <muthur@...il.com>

----------------------

 block/blk-mq.c         |    1 +
 block/blk-mq.h         |    1 -
 include/linux/blk-mq.h |    1 +
 3 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/block/blk-mq.c b/block/blk-mq.c
index 57039fc..3e08b87 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -1422,6 +1422,7 @@ void blk_mq_free_queue(struct request_queue *q)
        list_del_init(&q->all_q_node);
        mutex_unlock(&all_q_mutex);
 }
+EXPORT_SYMBOL(blk_mq_free_queue);

 /* Basically redo blk_mq_init_queue with queue frozen */
 static void blk_mq_queue_reinit(struct request_queue *q)
diff --git a/block/blk-mq.h b/block/blk-mq.h
index 5c39179..35ff4f7 100644
--- a/block/blk-mq.h
+++ b/block/blk-mq.h
@@ -28,7 +28,6 @@ void blk_mq_run_request(struct request *rq, bool
run_queue, bool async);
 void blk_mq_run_hw_queue(struct blk_mq_hw_ctx *hctx, bool async);
 void blk_mq_init_flush(struct request_queue *q);
 void blk_mq_drain_queue(struct request_queue *q);
-void blk_mq_free_queue(struct request_queue *q);

 /*
  * CPU hotplug helpers
diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h
index 851d34b..51109b8 100644
--- a/include/linux/blk-mq.h
+++ b/include/linux/blk-mq.h
@@ -113,6 +113,7 @@ enum {
 };

 struct request_queue *blk_mq_init_queue(struct blk_mq_reg *, void *);
+void blk_mq_free_queue(struct request_queue *q);
 int blk_mq_register_disk(struct gendisk *);
 void blk_mq_unregister_disk(struct gendisk *);
 void blk_mq_init_commands(struct request_queue *, void (*init)(void
*data, struct blk_mq_hw_ctx *, struct request *, unsigned int), void
*data);

-------------------------------
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