[PATCH 2/2] btrfs: delete debugfs code

[David Sterba]

Replaced by the sysfs exports that provide a more fine grained interface
for filesystem debugging.

Signed-off-by: David Sterba <dste...@suse.com>
---
 fs/btrfs/sysfs.c | 36 ------------------------------------
 fs/btrfs/sysfs.h |  5 -----
 2 files changed, 41 deletions(-)

diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c
index 6eef46556d75..db9fa801ec2d 100644
--- a/fs/btrfs/sysfs.c
+++ b/fs/btrfs/sysfs.c
@@ -9,7 +9,6 @@
 #include <linux/completion.h>
 #include <linux/kobject.h>
 #include <linux/bug.h>
-#include <linux/debugfs.h>
 
 #include "ctree.h"
 #include "disk-io.h"
@@ -826,12 +825,6 @@ int btrfs_sysfs_add_device_link(struct btrfs_fs_devices 
*fs_devices,
 /* /sys/fs/btrfs/ entry */
 static struct kset *btrfs_kset;
 
-/* /sys/kernel/debug/btrfs */
-static struct dentry *btrfs_debugfs_root_dentry;
-
-/* Debugging tunables and exported data */
-u64 btrfs_debugfs_test;
-
 /*
  * Can be called by the device discovery thread.
  * And parent can be specified for seed device
@@ -937,28 +930,6 @@ void btrfs_sysfs_feature_update(struct btrfs_fs_info 
*fs_info,
        ret = sysfs_create_group(fsid_kobj, &btrfs_feature_attr_group);
 }
 
-static int btrfs_init_debugfs(void)
-{
-#ifdef CONFIG_DEBUG_FS
-       btrfs_debugfs_root_dentry = debugfs_create_dir("btrfs", NULL);
-       if (!btrfs_debugfs_root_dentry)
-               return -ENOMEM;
-
-       /*
-        * Example code, how to export data through debugfs.
-        *
-        * file:        /sys/kernel/debug/btrfs/test
-        * contents of: btrfs_debugfs_test
-        */
-#ifdef CONFIG_BTRFS_DEBUG
-       debugfs_create_u64("test", S_IRUGO | S_IWUSR, btrfs_debugfs_root_dentry,
-                       &btrfs_debugfs_test);
-#endif
-
-#endif
-       return 0;
-}
-
 int __init btrfs_init_sysfs(void)
 {
        int ret;
@@ -967,10 +938,6 @@ int __init btrfs_init_sysfs(void)
        if (!btrfs_kset)
                return -ENOMEM;
 
-       ret = btrfs_init_debugfs();
-       if (ret)
-               goto out1;
-
        init_feature_attrs();
        ret = sysfs_create_group(&btrfs_kset->kobj, &btrfs_feature_attr_group);
        if (ret)
@@ -991,8 +958,6 @@ int __init btrfs_init_sysfs(void)
 out_remove_group:
        sysfs_remove_group(&btrfs_kset->kobj, &btrfs_feature_attr_group);
 out2:
-       debugfs_remove_recursive(btrfs_debugfs_root_dentry);
-out1:
        kset_unregister(btrfs_kset);
 
        return ret;
@@ -1004,6 +969,5 @@ void __cold btrfs_exit_sysfs(void)
                            &btrfs_static_feature_attr_group);
        sysfs_remove_group(&btrfs_kset->kobj, &btrfs_feature_attr_group);
        kset_unregister(btrfs_kset);
-       debugfs_remove_recursive(btrfs_debugfs_root_dentry);
 }
 
diff --git a/fs/btrfs/sysfs.h b/fs/btrfs/sysfs.h
index 40716b357c1d..4bb4fe96d4bd 100644
--- a/fs/btrfs/sysfs.h
+++ b/fs/btrfs/sysfs.h
@@ -3,11 +3,6 @@
 #ifndef BTRFS_SYSFS_H
 #define BTRFS_SYSFS_H
 
-/*
- * Data exported through sysfs
- */
-extern u64 btrfs_debugfs_test;
-
 enum btrfs_feature_set {
        FEAT_COMPAT,
        FEAT_COMPAT_RO,
-- 
2.22.0