FAILED: patch "[PATCH] btrfs: sysfs, rename device_link add/remove functions" failed to apply to 4.4-stable tree

[<gregkh@linuxfoundation.org>]

The patch below does not apply to the 4.4-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@vger.kernel.org>.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From f3cd2c58110dad14ee37cc47fd1473d90ee68ccb Mon Sep 17 00:00:00 2001
From: Anand Jain <anand.jain@oracle.com>
Date: Wed, 12 Feb 2020 17:28:13 +0800
Subject: [PATCH] btrfs: sysfs, rename device_link add/remove functions

Since commit 668e48af7a94 ("btrfs: sysfs, add devid/dev_state kobject and
device attributes"), the functions btrfs_sysfs_add_device_link() and
btrfs_sysfs_rm_device_link() do more than just adding and removing the
device link as its name indicated. Rename them to be more specific
that's about the directory with the attirbutes

Signed-off-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/dev-replace.c b/fs/btrfs/dev-replace.c
index 2aad07cdaea8..db93909b25e0 100644
--- a/fs/btrfs/dev-replace.c
+++ b/fs/btrfs/dev-replace.c
@@ -512,7 +512,7 @@ static int btrfs_dev_replace_start(struct btrfs_fs_info *fs_info,
 	atomic64_set(&dev_replace->num_uncorrectable_read_errors, 0);
 	up_write(&dev_replace->rwsem);
 
-	ret = btrfs_sysfs_add_device_link(tgt_device->fs_devices, tgt_device);
+	ret = btrfs_sysfs_add_devices_dir(tgt_device->fs_devices, tgt_device);
 	if (ret)
 		btrfs_err(fs_info, "kobj add dev failed %d", ret);
 
@@ -743,7 +743,7 @@ static int btrfs_dev_replace_finishing(struct btrfs_fs_info *fs_info,
 	mutex_unlock(&fs_info->fs_devices->device_list_mutex);
 
 	/* replace the sysfs entry */
-	btrfs_sysfs_rm_device_link(fs_info->fs_devices, src_device);
+	btrfs_sysfs_remove_devices_dir(fs_info->fs_devices, src_device);
 	btrfs_sysfs_update_devid(tgt_device);
 	btrfs_rm_dev_replace_free_srcdev(src_device);
 
diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c
index 119edd4341d6..651aa65b1f3f 100644
--- a/fs/btrfs/sysfs.c
+++ b/fs/btrfs/sysfs.c
@@ -960,7 +960,7 @@ void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info)
 	addrm_unknown_feature_attrs(fs_info, false);
 	sysfs_remove_group(&fs_info->fs_devices->fsid_kobj, &btrfs_feature_attr_group);
 	sysfs_remove_files(&fs_info->fs_devices->fsid_kobj, btrfs_attrs);
-	btrfs_sysfs_rm_device_link(fs_info->fs_devices, NULL);
+	btrfs_sysfs_remove_devices_dir(fs_info->fs_devices, NULL);
 }
 
 static const char * const btrfs_feature_set_names[FEAT_MAX] = {
@@ -1149,7 +1149,7 @@ int btrfs_sysfs_add_space_info_type(struct btrfs_fs_info *fs_info,
 
 /* when one_device is NULL, it removes all device links */
 
-int btrfs_sysfs_rm_device_link(struct btrfs_fs_devices *fs_devices,
+int btrfs_sysfs_remove_devices_dir(struct btrfs_fs_devices *fs_devices,
 		struct btrfs_device *one_device)
 {
 	struct hd_struct *disk;
@@ -1269,7 +1269,7 @@ static struct kobj_type devid_ktype = {
 	.release	= btrfs_release_devid_kobj,
 };
 
-int btrfs_sysfs_add_device_link(struct btrfs_fs_devices *fs_devices,
+int btrfs_sysfs_add_devices_dir(struct btrfs_fs_devices *fs_devices,
 				struct btrfs_device *one_device)
 {
 	int error = 0;
@@ -1395,13 +1395,13 @@ int btrfs_sysfs_add_mounted(struct btrfs_fs_info *fs_info)
 
 	btrfs_set_fs_info_ptr(fs_info);
 
-	error = btrfs_sysfs_add_device_link(fs_devs, NULL);
+	error = btrfs_sysfs_add_devices_dir(fs_devs, NULL);
 	if (error)
 		return error;
 
 	error = sysfs_create_files(fsid_kobj, btrfs_attrs);
 	if (error) {
-		btrfs_sysfs_rm_device_link(fs_devs, NULL);
+		btrfs_sysfs_remove_devices_dir(fs_devs, NULL);
 		return error;
 	}
 
diff --git a/fs/btrfs/sysfs.h b/fs/btrfs/sysfs.h
index c68582add92e..718a26c97833 100644
--- a/fs/btrfs/sysfs.h
+++ b/fs/btrfs/sysfs.h
@@ -14,9 +14,9 @@ enum btrfs_feature_set {
 
 char *btrfs_printable_features(enum btrfs_feature_set set, u64 flags);
 const char * const btrfs_feature_set_name(enum btrfs_feature_set set);
-int btrfs_sysfs_add_device_link(struct btrfs_fs_devices *fs_devices,
+int btrfs_sysfs_add_devices_dir(struct btrfs_fs_devices *fs_devices,
 		struct btrfs_device *one_device);
-int btrfs_sysfs_rm_device_link(struct btrfs_fs_devices *fs_devices,
+int btrfs_sysfs_remove_devices_dir(struct btrfs_fs_devices *fs_devices,
                 struct btrfs_device *one_device);
 int btrfs_sysfs_add_fsid(struct btrfs_fs_devices *fs_devs);
 void btrfs_sysfs_remove_fsid(struct btrfs_fs_devices *fs_devs);
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index b092021e41e9..387f80656476 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -2054,7 +2054,7 @@ int btrfs_rm_device(struct btrfs_fs_info *fs_info, const char *device_path,
 	if (device->bdev) {
 		cur_devices->open_devices--;
 		/* remove sysfs entry */
-		btrfs_sysfs_rm_device_link(fs_devices, device);
+		btrfs_sysfs_remove_devices_dir(fs_devices, device);
 	}
 
 	num_devices = btrfs_super_num_devices(fs_info->super_copy) - 1;
@@ -2174,7 +2174,7 @@ void btrfs_destroy_dev_replace_tgtdev(struct btrfs_device *tgtdev)
 
 	mutex_lock(&fs_devices->device_list_mutex);
 
-	btrfs_sysfs_rm_device_link(fs_devices, tgtdev);
+	btrfs_sysfs_remove_devices_dir(fs_devices, tgtdev);
 
 	if (tgtdev->bdev)
 		fs_devices->open_devices--;
@@ -2522,7 +2522,7 @@ int btrfs_init_new_device(struct btrfs_fs_info *fs_info, const char *device_path
 				    orig_super_num_devices + 1);
 
 	/* add sysfs device entry */
-	btrfs_sysfs_add_device_link(fs_devices, device);
+	btrfs_sysfs_add_devices_dir(fs_devices, device);
 
 	/*
 	 * we've got more storage, clear any full flags on the space
@@ -2590,7 +2590,7 @@ int btrfs_init_new_device(struct btrfs_fs_info *fs_info, const char *device_path
 	return ret;
 
 error_sysfs:
-	btrfs_sysfs_rm_device_link(fs_devices, device);
+	btrfs_sysfs_remove_devices_dir(fs_devices, device);
 	mutex_lock(&fs_info->fs_devices->device_list_mutex);
 	mutex_lock(&fs_info->chunk_mutex);
 	list_del_rcu(&device->dev_list);