Merge branch '40GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/net-queue

[linux-2.6-microblaze.git] / block / blk-mq-debugfs.c

diff --git a/block/blk-mq-debugfs.c b/block/blk-mq-debugfs.c
index 7e4136a..4d1ce9e 100644 (file)
--- a/block/blk-mq-debugfs.c
+++ b/block/blk-mq-debugfs.c
@@ -711,11 +711,6 @@ void blk_mq_debugfs_register(struct request_queue *q)
        }
 }
 
-void blk_mq_debugfs_unregister(struct request_queue *q)
-{
-       q->sched_debugfs_dir = NULL;
-}
-
 static void blk_mq_debugfs_register_ctx(struct blk_mq_hw_ctx *hctx,
                                        struct blk_mq_ctx *ctx)
 {
@@ -746,6 +741,8 @@ void blk_mq_debugfs_register_hctx(struct request_queue *q,
 
 void blk_mq_debugfs_unregister_hctx(struct blk_mq_hw_ctx *hctx)
 {
+       if (!hctx->queue->debugfs_dir)
+               return;
        debugfs_remove_recursive(hctx->debugfs_dir);
        hctx->sched_debugfs_dir = NULL;
        hctx->debugfs_dir = NULL;
@@ -773,6 +770,8 @@ void blk_mq_debugfs_register_sched(struct request_queue *q)
 {
        struct elevator_type *e = q->elevator->type;
 
+       lockdep_assert_held(&q->debugfs_mutex);
+
        /*
         * If the parent directory has not been created yet, return, we will be
         * called again later on and the directory/files will be created then.
@@ -790,6 +789,8 @@ void blk_mq_debugfs_register_sched(struct request_queue *q)
 
 void blk_mq_debugfs_unregister_sched(struct request_queue *q)
 {
+       lockdep_assert_held(&q->debugfs_mutex);
+
        debugfs_remove_recursive(q->sched_debugfs_dir);
        q->sched_debugfs_dir = NULL;
 }
@@ -811,6 +812,10 @@ static const char *rq_qos_id_to_name(enum rq_qos_id id)
 
 void blk_mq_debugfs_unregister_rqos(struct rq_qos *rqos)
 {
+       lockdep_assert_held(&rqos->q->debugfs_mutex);
+
+       if (!rqos->q->debugfs_dir)
+               return;
        debugfs_remove_recursive(rqos->debugfs_dir);
        rqos->debugfs_dir = NULL;
 }
@@ -820,6 +825,8 @@ void blk_mq_debugfs_register_rqos(struct rq_qos *rqos)
        struct request_queue *q = rqos->q;
        const char *dir_name = rq_qos_id_to_name(rqos->id);
 
+       lockdep_assert_held(&q->debugfs_mutex);
+
        if (rqos->debugfs_dir || !rqos->ops->debugfs_attrs)
                return;
 
@@ -833,17 +840,13 @@ void blk_mq_debugfs_register_rqos(struct rq_qos *rqos)
        debugfs_create_files(rqos->debugfs_dir, rqos, rqos->ops->debugfs_attrs);
 }
 
-void blk_mq_debugfs_unregister_queue_rqos(struct request_queue *q)
-{
-       debugfs_remove_recursive(q->rqos_debugfs_dir);
-       q->rqos_debugfs_dir = NULL;
-}
-
 void blk_mq_debugfs_register_sched_hctx(struct request_queue *q,
                                        struct blk_mq_hw_ctx *hctx)
 {
        struct elevator_type *e = q->elevator->type;
 
+       lockdep_assert_held(&q->debugfs_mutex);
+
        /*
         * If the parent debugfs directory has not been created yet, return;
         * We will be called again later on with appropriate parent debugfs
@@ -863,6 +866,10 @@ void blk_mq_debugfs_register_sched_hctx(struct request_queue *q,
 
 void blk_mq_debugfs_unregister_sched_hctx(struct blk_mq_hw_ctx *hctx)
 {
+       lockdep_assert_held(&hctx->queue->debugfs_mutex);
+
+       if (!hctx->queue->debugfs_dir)
+               return;
        debugfs_remove_recursive(hctx->sched_debugfs_dir);
        hctx->sched_debugfs_dir = NULL;
 }