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authorTejun Heo <tj@kernel.org>2013-11-28 14:54:30 -0500
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-11-29 17:55:10 -0800
commitccf73cf336dc55bc52748205dee998d2fd4a8808 (patch)
tree8e3a3b9891e6b9d4804299cd23110c91d8f8016e /fs/sysfs/inode.c
parent517e64f57883bd63c5a4ab8b3d0d3ed68c55d0cf (diff)
sysfs, kernfs: introduce kernfs[_find_and]_get() and kernfs_put()
Introduce kernfs interface for finding, getting and putting sysfs_dirents. * sysfs_find_dirent() is renamed to kernfs_find_ns() and lockdep assertion for sysfs_mutex is added. * sysfs_get_dirent_ns() is renamed to kernfs_find_and_get(). * Macro inline dancing around __sysfs_get/put() are removed and kernfs_get/put() are made proper functions implemented in fs/sysfs/dir.c. While the conversions are mostly equivalent, there's one difference - kernfs_get() doesn't return the input param as its return value. This change is intentional. While passing through the input increases writability in some areas, it is unnecessary and has been shown to cause confusion regarding how the last ref is handled. Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/sysfs/inode.c')
-rw-r--r--fs/sysfs/inode.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/fs/sysfs/inode.c b/fs/sysfs/inode.c
index b3c717ab3496..bfe4478f82bf 100644
--- a/fs/sysfs/inode.c
+++ b/fs/sysfs/inode.c
@@ -254,7 +254,8 @@ int sysfs_getattr(struct vfsmount *mnt, struct dentry *dentry,
static void sysfs_init_inode(struct sysfs_dirent *sd, struct inode *inode)
{
- inode->i_private = sysfs_get(sd);
+ kernfs_get(sd);
+ inode->i_private = sd;
inode->i_mapping->a_ops = &sysfs_aops;
inode->i_mapping->backing_dev_info = &sysfs_backing_dev_info;
inode->i_op = &sysfs_inode_operations;
@@ -321,7 +322,7 @@ void sysfs_evict_inode(struct inode *inode)
truncate_inode_pages(&inode->i_data, 0);
clear_inode(inode);
- sysfs_put(sd);
+ kernfs_put(sd);
}
int sysfs_permission(struct inode *inode, int mask)