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| author | Eric W. Biederman <ebiederm@xmission.com> | 2007-08-20 21:36:30 +0900 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2007-10-12 14:51:08 -0700 |
| commit | 5a26b79c426f8e55ebf7204cb138eb6b1645d4d3 (patch) | |
| tree | 4cdcd80f88a479a6ed1ef53042f3b17359c0e80e /fs/sysfs/dir.c | |
| parent | e0712bbfd9cb617fc3a822781c2466fb6b7ede50 (diff) | |
| download | linux-5a26b79c426f8e55ebf7204cb138eb6b1645d4d3.tar.gz linux-5a26b79c426f8e55ebf7204cb138eb6b1645d4d3.tar.bz2 linux-5a26b79c426f8e55ebf7204cb138eb6b1645d4d3.zip | |
sysfs: Remove s_dentry
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 <ebiederm@xmission.com>
Signed-off-by: Tejun Heo <htejun@gmail.com>
Cc: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'fs/sysfs/dir.c')
| -rw-r--r-- | fs/sysfs/dir.c | 32 |
1 files changed, 4 insertions, 28 deletions
diff --git a/fs/sysfs/dir.c b/fs/sysfs/dir.c index 1c3dc5d01ccd..36b6c796d4d5 100644 --- a/fs/sysfs/dir.c +++ b/fs/sysfs/dir.c @@ -289,22 +289,7 @@ 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); } @@ -352,9 +337,6 @@ 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) */ @@ -362,12 +344,6 @@ 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); } @@ -846,7 +822,7 @@ 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; @@ -881,7 +857,7 @@ 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)) { @@ -907,7 +883,7 @@ 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. */ |