[PATCH v5 02/10] blk-mq: Let blk_mq_debugfs_register() look up the queue name

Bart Van Assche
2017-04-25T20:37:37Z

A later patch will move the call of blk_mq_debugfs_register() to
a function to which the queue name is not passed as an argument.
To avoid having to add a 'name' argument to multiple callers, let
blk_mq_debugfs_register() look up the queue name.

Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: Omar Sandoval <osandov@fb.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
---
block/blk-mq-debugfs.c | 5 +++--
block/blk-mq-sysfs.c | 2 +-
block/blk-mq.h | 5 ++---
3 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/block/blk-mq-debugfs.c b/block/blk-mq-debugfs.c
index 3057641d5d15..e9282b945f6b 100644
--- a/block/blk-mq-debugfs.c
+++ b/block/blk-mq-debugfs.c
@@ -785,12 +785,13 @@ static const struct blk_mq_debugfs_attr blk_mq_debugfs_ctx_attrs[] = {
{},
};

-int blk_mq_debugfs_register(struct request_queue *q, const char *name)
+int blk_mq_debugfs_register(struct request_queue *q)
{
if (!blk_debugfs_root)
return -ENOENT;

- q->debugfs_dir = debugfs_create_dir(name, blk_debugfs_root);
+ q->debugfs_dir = debugfs_create_dir(kobject_name(q->kobj.parent),
+ blk_debugfs_root);
if (!q->debugfs_dir)
goto err;

diff --git a/block/blk-mq-sysfs.c b/block/blk-mq-sysfs.c
index a2dbb1a48e72..afb3451cf8a5 100644
--- a/block/blk-mq-sysfs.c
+++ b/block/blk-mq-sysfs.c
@@ -318,7 +318,7 @@ int __blk_mq_register_dev(struct device *dev, struct request_queue *q)

kobject_uevent(&q->mq_kobj, KOBJ_ADD);

- blk_mq_debugfs_register(q, kobject_name(&dev->kobj));
+ blk_mq_debugfs_register(q);

queue_for_each_hw_ctx(q, hctx, i) {
ret = blk_mq_register_hctx(hctx);
diff --git a/block/blk-mq.h b/block/blk-mq.h
index 7d955c756810..9049c0f11505 100644
--- a/block/blk-mq.h
+++ b/block/blk-mq.h
@@ -87,13 +87,12 @@ extern void blk_mq_hctx_kobj_init(struct blk_mq_hw_ctx *hctx);
* debugfs helpers
*/
#ifdef CONFIG_BLK_DEBUG_FS
-int blk_mq_debugfs_register(struct request_queue *q, const char *name);
+int blk_mq_debugfs_register(struct request_queue *q);
void blk_mq_debugfs_unregister(struct request_queue *q);
int blk_mq_debugfs_register_hctxs(struct request_queue *q);
void blk_mq_debugfs_unregister_hctxs(struct request_queue *q);
#else
-static inline int blk_mq_debugfs_register(struct request_queue *q,
- const char *name)
+static inline int blk_mq_debugfs_register(struct request_queue *q)
{
return 0;
}
--
2.12.2