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authorOmar Sandoval <osandov@fb.com>2017-01-31 14:53:20 -0800
committerJens Axboe <axboe@fb.com>2017-02-02 10:20:16 -0700
commit18fbda91c6370d520278db9ee1e768b59ef5c4ab (patch)
tree24a7e92d1dd90533dd783ea87abf13cf55284049 /block/blk-core.c
parenta428d314ebcf65842fd64ad850c02c280586e74d (diff)
downloadlinux-18fbda91c6370d520278db9ee1e768b59ef5c4ab.tar.bz2
block: use same block debugfs directory for blk-mq and blktrace
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>
Diffstat (limited to 'block/blk-core.c')
-rw-r--r--block/blk-core.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/block/blk-core.c b/block/blk-core.c
index a5726e01f839..76c42f559df8 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -33,6 +33,7 @@
#include <linux/ratelimit.h>
#include <linux/pm_runtime.h>
#include <linux/blk-cgroup.h>
+#include <linux/debugfs.h>
#define CREATE_TRACE_POINTS
#include <trace/events/block.h>
@@ -42,6 +43,10 @@
#include "blk-mq-sched.h"
#include "blk-wbt.h"
+#ifdef CONFIG_DEBUG_FS
+struct dentry *blk_debugfs_root;
+#endif
+
EXPORT_TRACEPOINT_SYMBOL_GPL(block_bio_remap);
EXPORT_TRACEPOINT_SYMBOL_GPL(block_rq_remap);
EXPORT_TRACEPOINT_SYMBOL_GPL(block_bio_complete);
@@ -3441,5 +3446,9 @@ int __init blk_dev_init(void)
blk_requestq_cachep = kmem_cache_create("request_queue",
sizeof(struct request_queue), 0, SLAB_PANIC, NULL);
+#ifdef CONFIG_DEBUG_FS
+ blk_debugfs_root = debugfs_create_dir("block", NULL);
+#endif
+
return 0;
}