lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

sysfs: Kill nlink counting.

Browse Source 
Tracking the number of subdirectories requires an extra field that increases
the size of sysfs_dirent.  nlinks are not particularly interesting for sysfs
and the nlink counts are wrong when network namespaces are involved so stop
counting them, and always return nlink == 1.  Userspace already knows that
directories with nlink == 1 have an nlink count they can't use to count
subdirectories.

This reduces the size of sysfs_dirent by 8 bytes on 64bit platforms.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Eric W. Biederman
2011-12-18 20:09:31 -08:00
committed by Greg Kroah-Hartman
parent cafa6b5dd7
commit 524b6c5b39
3 changed files with 0 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
fs/sysfs/sysfs.h
View File

@ -19,7 +19,6 @@ struct sysfs_open_dirent;
struct sysfs_elem_dir {
struct kobject *kobj;
unsigned long subdirs;
/* children rbtree starts here and goes through sd->s_rb */
struct rb_root children;
};