configfs: kill configfs_sb
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/configfs/dir.c b/fs/configfs/dir.c
index b0fbcbe..54c59a7 100644
--- a/fs/configfs/dir.c
+++ b/fs/configfs/dir.c
@@ -1079,6 +1079,7 @@
int ret;
struct configfs_dirent *p, *root_sd, *subsys_sd = NULL;
struct config_item *s_item = &subsys->su_group.cg_item;
+ struct dentry *root;
/*
* Pin the configfs filesystem. This means we can safely access
@@ -1093,9 +1094,10 @@
* subsystem is really registered, and so we need to lock out
* configfs_[un]register_subsystem().
*/
- mutex_lock(&configfs_sb->s_root->d_inode->i_mutex);
+ root = configfs_mount->mnt_root;
+ mutex_lock(&root->d_inode->i_mutex);
- root_sd = configfs_sb->s_root->d_fsdata;
+ root_sd = root->d_fsdata;
list_for_each_entry(p, &root_sd->s_children, s_sibling) {
if (p->s_type & CONFIGFS_DIR) {
@@ -1129,7 +1131,7 @@
out_unlock_dirent_lock:
spin_unlock(&configfs_dirent_lock);
out_unlock_fs:
- mutex_unlock(&configfs_sb->s_root->d_inode->i_mutex);
+ mutex_unlock(&root->d_inode->i_mutex);
/*
* If we succeeded, the fs is pinned via other methods. If not,
@@ -1543,6 +1545,7 @@
static int configfs_readdir(struct file * filp, void * dirent, filldir_t filldir)
{
struct dentry *dentry = filp->f_path.dentry;
+ struct super_block *sb = dentry->d_sb;
struct configfs_dirent * parent_sd = dentry->d_fsdata;
struct configfs_dirent *cursor = filp->private_data;
struct list_head *p, *q = &cursor->s_sibling;
@@ -1605,7 +1608,7 @@
ino = inode->i_ino;
spin_unlock(&configfs_dirent_lock);
if (!inode)
- ino = iunique(configfs_sb, 2);
+ ino = iunique(sb, 2);
if (filldir(dirent, name, len, filp->f_pos, ino,
dt_type(next)) < 0)
@@ -1677,6 +1680,7 @@
struct config_group *group = &subsys->su_group;
struct qstr name;
struct dentry *dentry;
+ struct dentry *root;
struct configfs_dirent *sd;
err = configfs_pin_fs();
@@ -1686,18 +1690,18 @@
if (!group->cg_item.ci_name)
group->cg_item.ci_name = group->cg_item.ci_namebuf;
- sd = configfs_sb->s_root->d_fsdata;
+ root = configfs_mount->mnt_root;
+ sd = root->d_fsdata;
link_group(to_config_group(sd->s_element), group);
- mutex_lock_nested(&configfs_sb->s_root->d_inode->i_mutex,
- I_MUTEX_PARENT);
+ mutex_lock_nested(&root->d_inode->i_mutex, I_MUTEX_PARENT);
name.name = group->cg_item.ci_name;
name.len = strlen(name.name);
name.hash = full_name_hash(name.name, name.len);
err = -ENOMEM;
- dentry = d_alloc(configfs_sb->s_root, &name);
+ dentry = d_alloc(root, &name);
if (dentry) {
d_add(dentry, NULL);
@@ -1714,7 +1718,7 @@
}
}
- mutex_unlock(&configfs_sb->s_root->d_inode->i_mutex);
+ mutex_unlock(&root->d_inode->i_mutex);
if (err) {
unlink_group(group);
@@ -1728,13 +1732,14 @@
{
struct config_group *group = &subsys->su_group;
struct dentry *dentry = group->cg_item.ci_dentry;
+ struct dentry *root = dentry->d_sb->s_root;
- if (dentry->d_parent != configfs_sb->s_root) {
+ if (dentry->d_parent != root) {
printk(KERN_ERR "configfs: Tried to unregister non-subsystem!\n");
return;
}
- mutex_lock_nested(&configfs_sb->s_root->d_inode->i_mutex,
+ mutex_lock_nested(&root->d_inode->i_mutex,
I_MUTEX_PARENT);
mutex_lock_nested(&dentry->d_inode->i_mutex, I_MUTEX_CHILD);
mutex_lock(&configfs_symlink_mutex);
@@ -1751,7 +1756,7 @@
d_delete(dentry);
- mutex_unlock(&configfs_sb->s_root->d_inode->i_mutex);
+ mutex_unlock(&root->d_inode->i_mutex);
dput(dentry);
