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:
  sysfs: cosmetic clean up on node creation failure paths
  sysfs: kill an extra put in sysfs_create_link() failure path
  Driver core: check return code of sysfs_create_link()
  HOWTO: Add the knwon_regression URI to the documentation
  dev_vdbg() documentation
  dev_vdbg(), available with -DVERBOSE_DEBUG
  sysfs: make sysfs_init_inode() static
  sysfs: fix sysfs root inode nlink accounting
  Documentation fix devres.txt: lib/iomap.c -> lib/devres.c
  sysfs: avoid kmem_cache_free(NULL)
  PM: remove deprecated dpm_runtime_* routines
  PM: Remove deprecated sysfs files
  Driver core: accept all valid action-strings in uevent-trigger
  debugfs: remove rmdir() non-empty complaint

7 files changed, 33 insertions, 31 deletions

diff --git a/fs/debugfs/inode.c b/fs/debugfs/inode.c
index 1d533a2..11be8a3 100644
--- a/fs/debugfs/inode.c
+++ b/fs/debugfs/inode.c
@@ -345,11 +345,6 @@ void debugfs_remove(struct dentry *dentry)
 			switch (dentry->d_inode->i_mode & S_IFMT) {
 			case S_IFDIR:
 				ret = simple_rmdir(parent->d_inode, dentry);
-				if (ret)
-					printk(KERN_ERR
-						"DebugFS rmdir on %s failed : "
-						"directory not empty.\n",
-						dentry->d_name.name);
 				break;
 			case S_IFLNK:
 				kfree(dentry->d_inode->i_private);
diff --git a/fs/sysfs/dir.c b/fs/sysfs/dir.c
index aee966c..048e605 100644
--- a/fs/sysfs/dir.c
+++ b/fs/sysfs/dir.c
@@ -361,20 +361,20 @@ static struct dentry_operations sysfs_dentry_ops = {
 struct sysfs_dirent *sysfs_new_dirent(const char *name, umode_t mode, int type)
 {
 	char *dup_name = NULL;
-	struct sysfs_dirent *sd = NULL;
+	struct sysfs_dirent *sd;
 
 	if (type & SYSFS_COPY_NAME) {
 		name = dup_name = kstrdup(name, GFP_KERNEL);
 		if (!name)
-			goto err_out;
+			return NULL;
 	}
 
 	sd = kmem_cache_zalloc(sysfs_dir_cachep, GFP_KERNEL);
 	if (!sd)
-		goto err_out;
+		goto err_out1;
 
 	if (sysfs_alloc_ino(&sd->s_ino))
-		goto err_out;
+		goto err_out2;
 
 	atomic_set(&sd->s_count, 1);
 	atomic_set(&sd->s_active, 0);
@@ -386,9 +386,10 @@ struct sysfs_dirent *sysfs_new_dirent(const char *name, umode_t mode, int type)
 
 	return sd;
 
- err_out:
-	kfree(dup_name);
+ err_out2:
 	kmem_cache_free(sysfs_dir_cachep, sd);
+ err_out1:
+	kfree(dup_name);
 	return NULL;
 }
 
@@ -698,17 +699,19 @@ static int create_dir(struct kobject *kobj, struct sysfs_dirent *parent_sd,
 
 	/* link in */
 	sysfs_addrm_start(&acxt, parent_sd);
+
 	if (!sysfs_find_dirent(parent_sd, name)) {
 		sysfs_add_one(&acxt, sd);
 		sysfs_link_sibling(sd);
 	}
-	if (sysfs_addrm_finish(&acxt)) {
-		*p_sd = sd;
-		return 0;
+
+	if (!sysfs_addrm_finish(&acxt)) {
+		sysfs_put(sd);
+		return -EEXIST;
 	}
 
-	sysfs_put(sd);
-	return -EEXIST;
+	*p_sd = sd;
+	return 0;
 }
 
 int sysfs_create_subdir(struct kobject *kobj, const char *name,
diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c
index cc49799..3e1cc06 100644
--- a/fs/sysfs/file.c
+++ b/fs/sysfs/file.c
@@ -410,11 +410,12 @@ int sysfs_add_file(struct sysfs_dirent *dir_sd, const struct attribute *attr,
 		sysfs_link_sibling(sd);
 	}
 
-	if (sysfs_addrm_finish(&acxt))
-		return 0;
+	if (!sysfs_addrm_finish(&acxt)) {
+		sysfs_put(sd);
+		return -EEXIST;
+	}
 
-	sysfs_put(sd);
-	return -EEXIST;
+	return 0;
 }
 
 
diff --git a/fs/sysfs/inode.c b/fs/sysfs/inode.c
index 3756e15..10d1b52 100644
--- a/fs/sysfs/inode.c
+++ b/fs/sysfs/inode.c
@@ -133,7 +133,7 @@ static inline void set_inode_attr(struct inode * inode, struct iattr * iattr)
  */
 static struct lock_class_key sysfs_inode_imutex_key;
 
-void sysfs_init_inode(struct sysfs_dirent *sd, struct inode *inode)
+static void sysfs_init_inode(struct sysfs_dirent *sd, struct inode *inode)
 {
 	inode->i_blocks = 0;
 	inode->i_mapping->a_ops = &sysfs_aops;
diff --git a/fs/sysfs/mount.c b/fs/sysfs/mount.c
index 402cc35..60714d0 100644
--- a/fs/sysfs/mount.c
+++ b/fs/sysfs/mount.c
@@ -43,19 +43,19 @@ static int sysfs_fill_super(struct super_block *sb, void *data, int silent)
 	sb->s_time_gran = 1;
 	sysfs_sb = sb;
 
-	inode = new_inode(sysfs_sb);
+	/* get root inode, initialize and unlock it */
+	inode = sysfs_get_inode(&sysfs_root);
 	if (!inode) {
 		pr_debug("sysfs: could not get root inode\n");
 		return -ENOMEM;
 	}
 
-	sysfs_init_inode(&sysfs_root, inode);
-
 	inode->i_op = &sysfs_dir_inode_operations;
 	inode->i_fop = &sysfs_dir_operations;
-	/* directory inodes start off with i_nlink == 2 (for "." entry) */
-	inc_nlink(inode);
+	inc_nlink(inode); /* directory, account for "." */
+	unlock_new_inode(inode);
 
+	/* instantiate and link root dentry */
 	root = d_alloc_root(inode);
 	if (!root) {
 		pr_debug("%s: could not get root dentry!\n",__FUNCTION__);
diff --git a/fs/sysfs/symlink.c b/fs/sysfs/symlink.c
index 2f86e04..4ce687f 100644
--- a/fs/sysfs/symlink.c
+++ b/fs/sysfs/symlink.c
@@ -86,7 +86,9 @@ int sysfs_create_link(struct kobject * kobj, struct kobject * target, const char
 	sd = sysfs_new_dirent(name, S_IFLNK|S_IRWXUGO, SYSFS_KOBJ_LINK);
 	if (!sd)
 		goto out_put;
+
 	sd->s_elem.symlink.target_sd = target_sd;
+	target_sd = NULL;	/* reference is now owned by the symlink */
 
 	sysfs_addrm_start(&acxt, parent_sd);
 
@@ -95,11 +97,13 @@ int sysfs_create_link(struct kobject * kobj, struct kobject * target, const char
 		sysfs_link_sibling(sd);
 	}
 
-	if (sysfs_addrm_finish(&acxt))
-		return 0;
+	if (!sysfs_addrm_finish(&acxt)) {
+		error = -EEXIST;
+		goto out_put;
+	}
+
+	return 0;
 
-	error = -EEXIST;
-	/* fall through */
  out_put:
 	sysfs_put(target_sd);
 	sysfs_put(sd);
diff --git a/fs/sysfs/sysfs.h b/fs/sysfs/sysfs.h
index 6a37f23..6b8c8d7 100644
--- a/fs/sysfs/sysfs.h
+++ b/fs/sysfs/sysfs.h
@@ -71,7 +71,6 @@ extern void sysfs_remove_one(struct sysfs_addrm_cxt *acxt,
 extern int sysfs_addrm_finish(struct sysfs_addrm_cxt *acxt);
 
 extern void sysfs_delete_inode(struct inode *inode);
-extern void sysfs_init_inode(struct sysfs_dirent *sd, struct inode *inode);
 extern struct inode * sysfs_get_inode(struct sysfs_dirent *sd);
 extern void sysfs_instantiate(struct dentry *dentry, struct inode *inode);