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blk-mq: Let blk_mq_debugfs_register() look up the queue name

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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>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Bart Van Assche 2017-04-26 13:47:49 -07:00 committed by Jens Axboe
parent 2d0364c8c1
commit 4c9e4019f1
3 changed files with 6 additions and 6 deletions
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5
block/blk-mq-debugfs.c
View file

@ -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;

2
block/blk-mq-sysfs.c
View file

@ -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);

5
block/blk-mq.h
View file

@ -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;
}