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| author | Tejun Heo <htejun@gmail.com> | 2007-06-14 03:45:18 +0900 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2007-07-11 16:09:07 -0700 |
| commit | 0c73f18b7d95de8a007039337063a770b5fc8e7a (patch) | |
| tree | cf3b6f274139b170136219918dd679f2397e69f6 /fs/sysfs/sysfs.h | |
| parent | 8619f979898397582e366877fd5feeba7560d70c (diff) | |
| download | linux-0c73f18b7d95de8a007039337063a770b5fc8e7a.tar.bz2 | |
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.h | 4 |
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 { |