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Subject[PATCH 02/11] sysfs: sysfs_get_dentry add a sb parameter
sysfs: sysfs_get_dentry add a sb parameter

In preparation for multiple mounts of sysfs add a superblock parameter to
sysfs_get_dentry.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Benjamin Thery <benjamin.thery@bull.net>
---
fs/sysfs/dir.c | 12 +++++++-----
fs/sysfs/file.c | 2 +-
fs/sysfs/sysfs.h | 3 ++-
3 files changed, 10 insertions(+), 7 deletions(-)
Index: linux-mm/fs/sysfs/dir.c
===================================================================
--- linux-mm.orig/fs/sysfs/dir.c
+++ linux-mm/fs/sysfs/dir.c
@@ -85,6 +85,7 @@ static void sysfs_unlink_sibling(struct

/**
* sysfs_get_dentry - get dentry for the given sysfs_dirent
+ * @sb: superblock of the dentry to return
* @sd: sysfs_dirent of interest
*
* Get dentry for @sd. Dentry is looked up if currently not
@@ -97,9 +98,10 @@ static void sysfs_unlink_sibling(struct
* RETURNS:
* Pointer to found dentry on success, ERR_PTR() value on error.
*/
-struct dentry *sysfs_get_dentry(struct sysfs_dirent *sd)
+struct dentry *sysfs_get_dentry(struct super_block *sb,
+ struct sysfs_dirent *sd)
{
- struct dentry *dentry = dget(sysfs_sb->s_root);
+ struct dentry *dentry = dget(sb->s_root);

while (dentry->d_fsdata != sd) {
struct sysfs_dirent *cur;
@@ -777,7 +779,7 @@ int sysfs_rename_dir(struct kobject * ko
goto out; /* nothing to rename */

/* get the original dentry */
- old_dentry = sysfs_get_dentry(sd);
+ old_dentry = sysfs_get_dentry(sysfs_sb, sd);
if (IS_ERR(old_dentry)) {
error = PTR_ERR(old_dentry);
old_dentry = NULL;
@@ -845,7 +847,7 @@ int sysfs_move_dir(struct kobject *kobj,
goto out; /* nothing to move */

/* get dentries */
- old_dentry = sysfs_get_dentry(sd);
+ old_dentry = sysfs_get_dentry(sysfs_sb, sd);
if (IS_ERR(old_dentry)) {
error = PTR_ERR(old_dentry);
old_dentry = NULL;
@@ -853,7 +855,7 @@ int sysfs_move_dir(struct kobject *kobj,
}
old_parent = old_dentry->d_parent;

- new_parent = sysfs_get_dentry(new_parent_sd);
+ new_parent = sysfs_get_dentry(sysfs_sb, new_parent_sd);
if (IS_ERR(new_parent)) {
error = PTR_ERR(new_parent);
new_parent = NULL;
Index: linux-mm/fs/sysfs/file.c
===================================================================
--- linux-mm.orig/fs/sysfs/file.c
+++ linux-mm/fs/sysfs/file.c
@@ -584,7 +584,7 @@ int sysfs_chmod_file(struct kobject *kob
goto out;

mutex_lock(&sysfs_rename_mutex);
- victim = sysfs_get_dentry(victim_sd);
+ victim = sysfs_get_dentry(sysfs_sb, victim_sd);
mutex_unlock(&sysfs_rename_mutex);
if (IS_ERR(victim)) {
rc = PTR_ERR(victim);
Index: linux-mm/fs/sysfs/sysfs.h
===================================================================
--- linux-mm.orig/fs/sysfs/sysfs.h
+++ linux-mm/fs/sysfs/sysfs.h
@@ -113,7 +113,8 @@ extern spinlock_t sysfs_assoc_lock;
extern const struct file_operations sysfs_dir_operations;
extern const struct inode_operations sysfs_dir_inode_operations;

-struct dentry *sysfs_get_dentry(struct sysfs_dirent *sd);
+struct dentry *sysfs_get_dentry(struct super_block *sb,
+ struct sysfs_dirent *sd);
struct sysfs_dirent *sysfs_get_active_two(struct sysfs_dirent *sd);
void sysfs_put_active_two(struct sysfs_dirent *sd);
void sysfs_addrm_start(struct sysfs_addrm_cxt *acxt,
--


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