[PATCH 8/47] SYSFS: allow sysfs_create_link to create symlinks in the root of sysfs

Greg KH
2006-09-26T05:38:39Z

From: Greg Kroah-Hartman <gregkh@suse.de>

This is needed to make the compatible link for /sys/block in the future.

Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
fs/sysfs/symlink.c | 14 ++++++++++++--
1 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/fs/sysfs/symlink.c b/fs/sysfs/symlink.c
index d2eac3c..f50e3cc 100644
--- a/fs/sysfs/symlink.c
+++ b/fs/sysfs/symlink.c
@@ -3,6 +3,7 @@
*/

#include <linux/fs.h>
+#include <linux/mount.h>
#include <linux/module.h>
#include <linux/kobject.h>
#include <linux/namei.h>
@@ -82,10 +83,19 @@ exit1:
*/
int sysfs_create_link(struct kobject * kobj, struct kobject * target, const char * name)
{
- struct dentry * dentry = kobj->dentry;
+ struct dentry *dentry = NULL;
int error = -EEXIST;

- BUG_ON(!kobj || !kobj->dentry || !name);
+ BUG_ON(!name);
+
+ if (!kobj) {
+ if (sysfs_mount && sysfs_mount->mnt_sb)
+ dentry = sysfs_mount->mnt_sb->s_root;
+ } else
+ dentry = kobj->dentry;
+
+ if (!dentry)
+ return -EFAULT;

mutex_lock(&dentry->d_inode->i_mutex);
if (!sysfs_dirent_exist(dentry->d_fsdata, name))
--
1.4.2.1