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authorLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-12 15:49:37 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-12 15:49:37 -0700
commitefefc6eb38d43b8e5daef482f575d767b002004e (patch)
tree8a3933db1f8721f9bcc9912c800dc8406f4bdf94 /fs/sysfs/symlink.c
parent117494a1b65183f0e3fcc817b07944bc5c465050 (diff)
parentcd59abfcc441b2abb4cf2cd62c1eb0f02a60e8dd (diff)
Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/driver-2.6
* master.kernel.org:/pub/scm/linux/kernel/git/gregkh/driver-2.6: (75 commits) PM: merge device power-management source files sysfs: add copyrights kobject: update the copyrights kset: add some kerneldoc to help describe what these strange things are Driver core: rename ktype_edd and ktype_efivar Driver core: rename ktype_driver Driver core: rename ktype_device Driver core: rename ktype_class driver core: remove subsystem_init() sysfs: move sysfs file poll implementation to sysfs_open_dirent sysfs: implement sysfs_open_dirent sysfs: move sysfs_dirent->s_children into sysfs_dirent->s_dir sysfs: make sysfs_root a regular directory dirent sysfs: open code sysfs_attach_dentry() sysfs: make s_elem an anonymous union sysfs: make bin attr open get active reference of parent too sysfs: kill unnecessary NULL pointer check in sysfs_release() sysfs: kill unnecessary sysfs_get() in open paths sysfs: reposition sysfs_dirent->s_mode. sysfs: kill sysfs_update_file() ...
Diffstat (limited to 'fs/sysfs/symlink.c')
-rw-r--r--fs/sysfs/symlink.c34
1 files changed, 18 insertions, 16 deletions
diff --git a/fs/sysfs/symlink.c b/fs/sysfs/symlink.c
index 4ce687f0b5d..3eac20c63c4 100644
--- a/fs/sysfs/symlink.c
+++ b/fs/sysfs/symlink.c
@@ -1,5 +1,13 @@
/*
- * symlink.c - operations for sysfs symlinks.
+ * fs/sysfs/symlink.c - sysfs symlink implementation
+ *
+ * Copyright (c) 2001-3 Patrick Mochel
+ * Copyright (c) 2007 SUSE Linux Products GmbH
+ * Copyright (c) 2007 Tejun Heo <teheo@suse.de>
+ *
+ * This file is released under the GPLv2.
+ *
+ * Please see Documentation/filesystems/sysfs.txt for more information.
*/
#include <linux/fs.h>
@@ -7,7 +15,7 @@
#include <linux/module.h>
#include <linux/kobject.h>
#include <linux/namei.h>
-#include <asm/semaphore.h>
+#include <linux/mutex.h>
#include "sysfs.h"
@@ -60,10 +68,9 @@ int sysfs_create_link(struct kobject * kobj, struct kobject * target, const char
BUG_ON(!name);
- if (!kobj) {
- if (sysfs_mount && sysfs_mount->mnt_sb)
- parent_sd = sysfs_mount->mnt_sb->s_root->d_fsdata;
- } else
+ if (!kobj)
+ parent_sd = &sysfs_root;
+ else
parent_sd = kobj->sd;
error = -EFAULT;
@@ -87,20 +94,15 @@ int sysfs_create_link(struct kobject * kobj, struct kobject * target, const char
if (!sd)
goto out_put;
- sd->s_elem.symlink.target_sd = target_sd;
+ sd->s_symlink.target_sd = target_sd;
target_sd = NULL; /* reference is now owned by the symlink */
sysfs_addrm_start(&acxt, parent_sd);
+ error = sysfs_add_one(&acxt, sd);
+ sysfs_addrm_finish(&acxt);
- if (!sysfs_find_dirent(parent_sd, name)) {
- sysfs_add_one(&acxt, sd);
- sysfs_link_sibling(sd);
- }
-
- if (!sysfs_addrm_finish(&acxt)) {
- error = -EEXIST;
+ if (error)
goto out_put;
- }
return 0;
@@ -148,7 +150,7 @@ static int sysfs_getlink(struct dentry *dentry, char * path)
{
struct sysfs_dirent *sd = dentry->d_fsdata;
struct sysfs_dirent *parent_sd = sd->s_parent;
- struct sysfs_dirent *target_sd = sd->s_elem.symlink.target_sd;
+ struct sysfs_dirent *target_sd = sd->s_symlink.target_sd;
int error;
mutex_lock(&sysfs_mutex);