joel16/android_kernel_sony_msm8994_rework
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sysfs: switch to ->s_d_op and ->d_release()

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a) ->d_iput() is wrong here - what we do to inode is completely usual, it's
dentry->d_fsdata that we want to drop.  Just use ->d_release().

b) switch to ->s_d_op - no need to play with d_set_d_op()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2012-06-07 20:51:39 -04:00
parent 79714f72d3
commit 469796d105
3 changed files with 8 additions and 10 deletions
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16
fs/sysfs/dir.c
View File

@ -300,7 +300,7 @@ void release_sysfs_dirent(struct sysfs_dirent * sd)
static int sysfs_dentry_delete(const struct dentry *dentry)
{
struct sysfs_dirent *sd = dentry->d_fsdata;
return !!(sd->s_flags & SYSFS_FLAG_REMOVED);
return !(sd && !(sd->s_flags & SYSFS_FLAG_REMOVED));
}
static int sysfs_dentry_revalidate(struct dentry *dentry, unsigned int flags)
@ -355,18 +355,15 @@ out_bad:
return 0;
}
static void sysfs_dentry_iput(struct dentry *dentry, struct inode *inode)
static void sysfs_dentry_release(struct dentry *dentry)
{
struct sysfs_dirent * sd = dentry->d_fsdata;
sysfs_put(sd);
iput(inode);
sysfs_put(dentry->d_fsdata);
}
static const struct dentry_operations sysfs_dentry_ops = {
const struct dentry_operations sysfs_dentry_ops = {
.d_revalidate = sysfs_dentry_revalidate,
.d_delete = sysfs_dentry_delete,
.d_iput = sysfs_dentry_iput,
.d_release = sysfs_dentry_release,
};
struct sysfs_dirent *sysfs_new_dirent(const char *name, umode_t mode, int type)
@ -786,6 +783,7 @@ static struct dentry * sysfs_lookup(struct inode *dir, struct dentry *dentry,
ret = ERR_PTR(-ENOENT);
goto out_unlock;
}
dentry->d_fsdata = sysfs_get(sd);
/* attach dentry and inode */
inode = sysfs_get_inode(dir->i_sb, sd);
@ -797,8 +795,6 @@ static struct dentry * sysfs_lookup(struct inode *dir, struct dentry *dentry,
/* instantiate and hash dentry */
ret = d_find_alias(inode);
if (!ret) {
d_set_d_op(dentry, &sysfs_dentry_ops);
dentry->d_fsdata = sysfs_get(sd);
d_add(dentry, inode);
} else {
d_move(ret, dentry);

1
fs/sysfs/mount.c
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@ -68,6 +68,7 @@ static int sysfs_fill_super(struct super_block *sb, void *data, int silent)
}
root->d_fsdata = &sysfs_root;
sb->s_root = root;
sb->s_d_op = &sysfs_dentry_ops;
return 0;
}

1
fs/sysfs/sysfs.h
View File

@ -157,6 +157,7 @@ extern struct kmem_cache *sysfs_dir_cachep;
*/
extern struct mutex sysfs_mutex;
extern spinlock_t sysfs_assoc_lock;
extern const struct dentry_operations sysfs_dentry_ops;
extern const struct file_operations sysfs_dir_operations;
extern const struct inode_operations sysfs_dir_inode_operations;