diff options
| author |   Christophe JAILLET <christophe.jaillet@wanadoo.fr> | 2024-07-08 23:32:42 +0900 |
|---|---|---|
| committer |   Andrew Morton <akpm@linux-foundation.org> | 2024-07-12 16:39:52 -0700 |
| commit | fbc8846cd9c258e3844d22afd4d1ae7240077aab (patch) | |
| tree | fb10070505480e6fe8d2efe9f2d7b7f6882e15df | |
| parent | nilfs2: avoid undefined behavior in nilfs_cnt32_ge macro (diff) | |
| download | wireguard-linux-fbc8846cd9c258e3844d22afd4d1ae7240077aab.tar.xz wireguard-linux-fbc8846cd9c258e3844d22afd4d1ae7240077aab.zip | |
nilfs2: Constify struct kobj_type
'struct kobj_type' is not modified in this driver. It is only used with
kobject_init_and_add() which takes a "const struct kobj_type *" parameter.
Constifying this structure moves some data to a read-only section, so
increase overall security.
On a x86_64, with allmodconfig:
Before:
======
text data bss dec hex filename
22403 4184 24 26611 67f3 fs/nilfs2/sysfs.o
After:
=====
text data bss dec hex filename
22723 3928 24 26675 6833 fs/nilfs2/sysfs.o
Link: https://lkml.kernel.org/r/20240708143242.3296-1-konishi.ryusuke@gmail.com
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to '')
| -rw-r--r-- | fs/nilfs2/sysfs.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/fs/nilfs2/sysfs.c b/fs/nilfs2/sysfs.c index 379d22e28ed6..a5569b7f47a3 100644 --- a/fs/nilfs2/sysfs.c +++ b/fs/nilfs2/sysfs.c @@ -56,7 +56,7 @@ static void nilfs_##name##_attr_release(struct kobject *kobj) \ sg_##name##_kobj); \ complete(&subgroups->sg_##name##_kobj_unregister); \ } \ -static struct kobj_type nilfs_##name##_ktype = { \ +static const struct kobj_type nilfs_##name##_ktype = { \ .default_groups = nilfs_##name##_groups, \ .sysfs_ops = &nilfs_##name##_attr_ops, \ .release = nilfs_##name##_attr_release, \ @@ -166,7 +166,7 @@ static const struct sysfs_ops nilfs_snapshot_attr_ops = { .store = nilfs_snapshot_attr_store, }; -static struct kobj_type nilfs_snapshot_ktype = { +static const struct kobj_type nilfs_snapshot_ktype = { .default_groups = nilfs_snapshot_groups, .sysfs_ops = &nilfs_snapshot_attr_ops, .release = nilfs_snapshot_attr_release, @@ -967,7 +967,7 @@ static const struct sysfs_ops nilfs_dev_attr_ops = { .store = nilfs_dev_attr_store, }; -static struct kobj_type nilfs_dev_ktype = { +static const struct kobj_type nilfs_dev_ktype = { .default_groups = nilfs_dev_groups, .sysfs_ops = &nilfs_dev_attr_ops, .release = nilfs_dev_attr_release, |