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block: use same block debugfs directory for blk-mq and blktrace

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When I added the blk-mq debugging information to debugfs, I didn't
notice that blktrace also creates a "block" directory in debugfs. Make
them use the same dentry, now created in the core block code. Based on a
patch from Jens.

Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Omar Sandoval
2017-01-31 14:53:20 -08:00
committed by Jens Axboe
parent a428d314eb
commit 18fbda91c6
6 changed files with 21 additions and 29 deletions
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block/blk-mq-debugfs.c
+3 -9
View File
@@ -19,6 +19,7 @@
#include <linux/debugfs.h>
#include <linux/blk-mq.h>
#include "blk.h"
#include "blk-mq.h"
#include "blk-mq-tag.h"
@@ -28,8 +29,6 @@ struct blk_mq_debugfs_attr {
const struct file_operations *fops;
};
static struct dentry *block_debugfs_root;
static int blk_mq_debugfs_seq_open(struct inode *inode, struct file *file,
const struct seq_operations *ops)
{
@@ -665,10 +664,10 @@ static const struct blk_mq_debugfs_attr blk_mq_debugfs_ctx_attrs[] = {
int blk_mq_debugfs_register(struct request_queue *q, const char *name)
{
if (!block_debugfs_root)
if (!blk_debugfs_root)
return -ENOENT;
q->debugfs_dir = debugfs_create_dir(name, block_debugfs_root);
q->debugfs_dir = debugfs_create_dir(name, blk_debugfs_root);
if (!q->debugfs_dir)
goto err;
@@ -771,8 +770,3 @@ void blk_mq_debugfs_unregister_hctxs(struct request_queue *q)
debugfs_remove_recursive(q->mq_debugfs_dir);
q->mq_debugfs_dir = NULL;
}
void blk_mq_debugfs_init(void)
{
block_debugfs_root = debugfs_create_dir("block", NULL);
}