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authorTejun Heo <tj@kernel.org>2013-11-28 23:54:14 +0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-11-30 05:19:16 +0400
commit7c6e2d362c19f01e6d6c8be59d83a89722032884 (patch)
treef47de0a95ae5de6016f19f949dacfe3a77326c31 /fs/sysfs/sysfs.h
parent45b4539309d82ae04e6ed7de494ae194ca0755aa (diff)
downloadlinux-7c6e2d362c19f01e6d6c8be59d83a89722032884.tar.xz
sysfs, kernfs: replace sysfs_dirent->s_dir.kobj and ->s_attr.[bin_]attr with ->priv
A directory sysfs_dirent points to the associated kobj. A regular or bin file points to the associated [bin_]attribute. This patch replaces sysfs_dirent->s_dir.kobj and ->s_attr.[bin_]attr with void * ->priv. This is to prepare for kernfs interface so that sysfs can specify the private data in the same way for directories and files. This lower debuggability but not by much - the whole thing was overlaid in a union anyway. If debuggability becomes an issue, we can later add ->priv accessors which explicitly check for the sysfs_dirent type and performs casting. This patch doesn't introduce any behavior difference. Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/sysfs/sysfs.h')
-rw-r--r--fs/sysfs/sysfs.h13
1 files changed, 5 insertions, 8 deletions
diff --git a/fs/sysfs/sysfs.h b/fs/sysfs/sysfs.h
index 2abccfdd932e..a6f3fa3f02fe 100644
--- a/fs/sysfs/sysfs.h
+++ b/fs/sysfs/sysfs.h
@@ -17,8 +17,6 @@ struct sysfs_open_dirent;
/* type-specific structures for sysfs_dirent->s_* union members */
struct sysfs_elem_dir {
- struct kobject *kobj;
-
unsigned long subdirs;
/* children rbtree starts here and goes through sd->s_rb */
struct rb_root children;
@@ -29,10 +27,6 @@ struct sysfs_elem_symlink {
};
struct sysfs_elem_attr {
- union {
- struct attribute *attr;
- struct bin_attribute *bin_attr;
- };
struct sysfs_open_dirent *open;
};
@@ -74,6 +68,8 @@ struct sysfs_dirent {
struct sysfs_elem_attr s_attr;
};
+ void *priv;
+
unsigned short s_flags;
umode_t s_mode;
unsigned int s_ino;
@@ -103,7 +99,7 @@ static inline unsigned int sysfs_type(struct sysfs_dirent *sd)
#define sysfs_dirent_init_lockdep(sd) \
do { \
- struct attribute *attr = sd->s_attr.attr; \
+ struct attribute *attr = sd->priv; \
struct lock_class_key *key = attr->key; \
if (!key) \
key = &attr->skey; \
@@ -114,10 +110,11 @@ do { \
/* Test for attributes that want to ignore lockdep for read-locking */
static inline bool sysfs_ignore_lockdep(struct sysfs_dirent *sd)
{
+ struct attribute *attr = sd->priv;
int type = sysfs_type(sd);
return (type == SYSFS_KOBJ_ATTR || type == SYSFS_KOBJ_BIN_ATTR) &&
- sd->s_attr.attr->ignore_lockdep;
+ attr->ignore_lockdep;
}
#else