xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

sysfs: Only take active references on attributes.

Browse Source 
If we exclude directories and symlinks from the set of sysfs
dirents where we need active references we are left with
sysfs attributes (binary or not).

- Tweak sysfs_deactivate to only do something on attributes
- Move lockdep initialization into sysfs_file_add_mode to
  limit it to just attributes.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Acked-by: WANG Cong <xiyou.wangcong@gmail.com>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Eric W. Biederman
2010-02-11 15:20:00 -08:00
committed by Greg Kroah-Hartman
parent e72ceb8cca
commit a2db684287
3 changed files with 6 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
fs/sysfs/dir.c
View File

@@ -156,6 +156,10 @@ static void sysfs_deactivate(struct sysfs_dirent *sd)
int v;
BUG_ON(sd->s_sibling || !(sd->s_flags & SYSFS_FLAG_REMOVED));
if (!(sysfs_type(sd) & SYSFS_ACTIVE_REF))
return;
sd->s_sibling = (void *)&wait;
rwsem_acquire(&sd->dep_map, 0, 0, _RET_IP_);
@@ -315,7 +319,6 @@ struct sysfs_dirent *sysfs_new_dirent(const char *name, umode_t mode, int type)
atomic_set(&sd->s_count, 1);
atomic_set(&sd->s_active, 0);
sysfs_dirent_init_lockdep(sd);
sd->s_name = name;
sd->s_mode = mode;