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authorEric W. Biederman <ebiederm@xmission.com>2011-12-18 20:09:31 -0800
committerGreg Kroah-Hartman <gregkh@suse.de>2012-01-24 12:41:46 -0800
commit524b6c5b39b931311dfe5a2f5abae2f5c9731676 (patch)
tree0f81439d21bda26dbf94746a7e7da39ec7368fab /fs/sysfs/dir.c
parentcafa6b5dd7ce4f0e0a30be301be4efed587a7808 (diff)
sysfs: Kill nlink counting.
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>
Diffstat (limited to 'fs/sysfs/dir.c')
-rw-r--r--fs/sysfs/dir.c6
1 files changed, 0 insertions, 6 deletions
diff --git a/fs/sysfs/dir.c b/fs/sysfs/dir.c
index 0589c9a694b..ea64d01400a 100644
--- a/fs/sysfs/dir.c
+++ b/fs/sysfs/dir.c
@@ -91,9 +91,6 @@ static int sysfs_link_sibling(struct sysfs_dirent *sd)
struct rb_node **node = &sd->s_parent->s_dir.children.rb_node;
struct rb_node *parent = NULL;
- if (sysfs_type(sd) == SYSFS_DIR)
- sd->s_parent->s_dir.subdirs++;
-
while (*node) {
struct sysfs_dirent *pos;
int result;
@@ -126,9 +123,6 @@ static int sysfs_link_sibling(struct sysfs_dirent *sd)
*/
static void sysfs_unlink_sibling(struct sysfs_dirent *sd)
{
- if (sysfs_type(sd) == SYSFS_DIR)
- sd->s_parent->s_dir.subdirs--;
-
rb_erase(&sd->s_rb, &sd->s_parent->s_dir.children);
}