linux-kernel - [PATCH 1/4] kernfs: add dummy implementation of kernfs_path_from

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Date:	Tue,  9 Aug 2016 01:23:21 -0400
From:	Tejun Heo <tj@...nel.org>
To:	gregkh@...uxfoundation.org, serge.hallyn@...ntu.com
Cc:	linux-kernel@...r.kernel.org, cgroups@...r.kernel.org,
	kernel-team@...com, hannes@...xchg.org, lizefan@...wei.com,
	Tejun Heo <tj@...nel.org>
Subject: [PATCH 1/4] kernfs: add dummy implementation of kernfs_path_from_node()

The dummy version of kernfs_path_from_node() was missing.  This
currently doesn't break anything.  Let's add it for consistency and to
ease adding wrappers around it.

Signed-off-by: Tejun Heo <tj@...nel.org>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 include/linux/kernfs.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/include/linux/kernfs.h b/include/linux/kernfs.h
index 96356ef..325954f 100644
--- a/include/linux/kernfs.h
+++ b/include/linux/kernfs.h
@@ -344,6 +344,11 @@ static inline int kernfs_name(struct kernfs_node *kn, char *buf, size_t buflen)
 static inline size_t kernfs_path_len(struct kernfs_node *kn)
 { return 0; }
 
+static inline int kernfs_path_from_node(struct kernfs_node *root_kn,
+					struct kernfs_node *kn,
+					char *buf, size_t buflen);
+{ return -ENOSYS; }
+
 static inline char *kernfs_path(struct kernfs_node *kn, char *buf,
 				size_t buflen)
 { return NULL; }
-- 
2.7.4