Subject: [PATCH 2/2] sysfs: allow creating symlinks from untagged to tagged directories

From: [email-masked] (Eric W. Biederman)
Date: Tue, 20 Jul 2010 22:12:01 -0700

Supporting symlinks from untagged to tagged directories is reasonable,
and needed to support CONFIG_SYSFS_DEPRECATED.  So don't fail a prior
allowing that case to work.

Signed-off-by: Eric W. Biederman <[email-masked]>
---
 fs/sysfs/symlink.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/fs/sysfs/symlink.c b/fs/sysfs/symlink.c
index 6603833..a7ac78f 100644
--- a/fs/sysfs/symlink.c
+++ b/fs/sysfs/symlink.c
@@ -67,7 +67,8 @@ static int sysfs_do_create_link(struct kobject *kobj, struct kobject *target,
 
 	sysfs_addrm_start(&acxt, parent_sd);
 	/* Symlinks must be between directories with the same ns_type */
-	if (ns_type == sysfs_ns_type(sd->s_symlink.target_sd->s_parent)) {
+	if (!ns_type ||
+	    (ns_type == sysfs_ns_type(sd->s_symlink.target_sd->s_parent))) {
 		if (warn)
 			error = sysfs_add_one(&acxt, sd);
 		else
-- 
1.6.5.2.143.g8cc62