The only uses of s_dentry left are the code that maintains
s_dentry and trivial users that don't actually need it.
So this patch removes the s_dentry maintenance code and
restructures the trivial uses to use something else.
Signed-off-by: Eric W. Biederman <[EMAIL PROTECTED]>
---
fs/sysfs/dir.c | 32 ++++----------------------------
fs/sysfs/mount.c | 1 -
fs/sysfs/sysfs.h | 1 -
3 files changed, 4 insertions(+), 30 deletions(-)
diff --git a/fs/sysfs/dir.c b/fs/sysfs/dir.c
index adb1b01..1078e60 100644
--- a/fs/sysfs/dir.c
+++ b/fs/sysfs/dir.c
@@ -247,22 +247,7 @@ static void sysfs_d_iput(struct dentry * dentry, struct
inode * inode)
{
struct sysfs_dirent * sd = dentry->d_fsdata;
- if (sd) {
- /* sd->s_dentry is protected with sysfs_assoc_lock.
- * This allows sysfs_drop_dentry() to dereference it.
- */
- spin_lock(&sysfs_assoc_lock);
-
- /* The dentry might have been deleted or another
- * lookup could have happened updating sd->s_dentry to
- * point the new dentry. Ignore if it isn't pointing
- * to this dentry.
- */
- if (sd->s_dentry == dentry)
- sd->s_dentry = NULL;
- spin_unlock(&sysfs_assoc_lock);
- sysfs_put(sd);
- }
+ sysfs_put(sd);
iput(inode);
}
@@ -310,9 +295,6 @@ struct sysfs_dirent *sysfs_new_dirent(const char *name,
umode_t mode, int type)
* @sd: target sysfs_dirent
* @dentry: dentry to associate
*
- * Associate @sd with @dentry. This is protected by
- * sysfs_assoc_lock to avoid race with sysfs_d_iput().
- *
* LOCKING:
* mutex_lock(sysfs_mutex)
*/
@@ -320,12 +302,6 @@ static void sysfs_attach_dentry(struct sysfs_dirent *sd,
struct dentry *dentry)
{
dentry->d_op = &sysfs_dentry_ops;
dentry->d_fsdata = sysfs_get(sd);
-
- /* protect sd->s_dentry against sysfs_d_iput */
- spin_lock(&sysfs_assoc_lock);
- sd->s_dentry = dentry;
- spin_unlock(&sysfs_assoc_lock);
-
d_rehash(dentry);
}
@@ -927,7 +903,7 @@ int sysfs_rename_dir(struct kobject * kobj, const char
*new_name)
/* rename */
d_add(new_dentry, NULL);
- d_move(sd->s_dentry, new_dentry);
+ d_move(old_dentry, new_dentry);
error = 0;
goto out_unlock;
@@ -960,7 +936,7 @@ int sysfs_move_dir(struct kobject *kobj, struct kobject
*new_parent_kobj)
error = PTR_ERR(old_dentry);
goto out_dput;
}
- old_parent = sd->s_parent->s_dentry;
+ old_parent = old_dentry->d_parent;
new_parent = sysfs_get_dentry(new_parent_sd);
if (IS_ERR(new_parent)) {
@@ -986,7 +962,7 @@ again:
} else
error = 0;
d_add(new_dentry, NULL);
- d_move(sd->s_dentry, new_dentry);
+ d_move(old_dentry, new_dentry);
dput(new_dentry);
/* Remove from old parent's list and insert into new parent's list. */
diff --git a/fs/sysfs/mount.c b/fs/sysfs/mount.c
index 9fae7d5..4968d31 100644
--- a/fs/sysfs/mount.c
+++ b/fs/sysfs/mount.c
@@ -57,7 +57,6 @@ static int sysfs_fill_super(struct super_block *sb, void
*data, int silent)
iput(inode);
return -ENOMEM;
}
- sysfs_root.s_dentry = root;
root->d_fsdata = &sysfs_root;
sb->s_root = root;
return 0;
diff --git a/fs/sysfs/sysfs.h b/fs/sysfs/sysfs.h
index 77253aa..8ed13cf 100644
--- a/fs/sysfs/sysfs.h
+++ b/fs/sysfs/sysfs.h
@@ -37,7 +37,6 @@ struct sysfs_dirent {
unsigned int s_flags;
umode_t s_mode;
ino_t s_ino;
- struct dentry * s_dentry;
struct iattr * s_iattr;
atomic_t s_event;
};
--
1.5.1.1.181.g2de0
-
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