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authorTejun Heo <htejun@gmail.com>2007-06-13 22:45:18 +0400
committerGreg Kroah-Hartman <gregkh@suse.de>2007-07-12 03:09:07 +0400
commit0c73f18b7d95de8a007039337063a770b5fc8e7a (patch)
treecf3b6f274139b170136219918dd679f2397e69f6 /fs/sysfs/sysfs.h
parent8619f979898397582e366877fd5feeba7560d70c (diff)
downloadlinux-0c73f18b7d95de8a007039337063a770b5fc8e7a.tar.xz
sysfs: use singly-linked list for sysfs_dirent tree
Make sysfs_dirent use singly linked list for its tree structure. sysfs_link_sibling() and sysfs_unlink_sibling() functions are added to handle simpler cases. It adds some complexity and cpu cycle overhead but reduced memory footprint is worthwhile on big machines. This change reduces the sizeof sysfs_dirent from 104 to 88 on 64bit and from 60 to 52 on 32bit. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'fs/sysfs/sysfs.h')
-rw-r--r--fs/sysfs/sysfs.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/sysfs/sysfs.h b/fs/sysfs/sysfs.h
index ae006b070bf0..6f8aaf3805d2 100644
--- a/fs/sysfs/sysfs.h
+++ b/fs/sysfs/sysfs.h
@@ -23,8 +23,8 @@ struct sysfs_dirent {
atomic_t s_count;
atomic_t s_active;
struct sysfs_dirent * s_parent;
- struct list_head s_sibling;
- struct list_head s_children;
+ struct sysfs_dirent * s_sibling;
+ struct sysfs_dirent * s_children;
const char * s_name;
union {