diff options
| author | Huang Xiaojia <huangxiaojia2@huawei.com> | 2024-08-26 23:09:55 +0800 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2024-09-05 22:25:36 +1000 |
| commit | 7509c23770054fdaffd966926462248d44a323c1 (patch) | |
| tree | 064638c273945ce756a9c2103399dcd8a7ddbab7 /arch | |
| parent | 02b98ff44a57c1376c5a92a8518fda5c82bb5a91 (diff) | |
powerpc: Constify struct kobj_type
'struct kobj_type' is not modified. It is only used in
kobject_init_and_add()/kobject_init() which takes
a 'const struct kobj_type *ktype' parameter.
Constifying this structure moves some data to a read-only section,
so increase over all security.
On a x86_64, compiled with ppc64 defconfig:
Before:
======
text data bss dec hex filename
7145 606 0 7751 1e47 arch/powerpc/kernel/cacheinfo.o
3663 384 16 4063 fdf arch/powerpc/kernel/secvar-sysfs.o
After:
======
text data bss dec hex filename
7193 558 0 7751 1e47 arch/powerpc/kernel/cacheinfo.o
3663 384 16 4063 fdf arch/powerpc/kernel/secvar-sysfs.o
Signed-off-by: Huang Xiaojia <huangxiaojia2@huawei.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20240826150957.3500237-1-huangxiaojia2@huawei.com
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/kernel/cacheinfo.c | 2 | ||||
| -rw-r--r-- | arch/powerpc/kernel/secvar-sysfs.c | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/arch/powerpc/kernel/cacheinfo.c b/arch/powerpc/kernel/cacheinfo.c index f502337dd37d..0fcc463b02e2 100644 --- a/arch/powerpc/kernel/cacheinfo.c +++ b/arch/powerpc/kernel/cacheinfo.c @@ -735,7 +735,7 @@ static const struct sysfs_ops cache_index_ops = { .show = cache_index_show, }; -static struct kobj_type cache_index_type = { +static const struct kobj_type cache_index_type = { .release = cache_index_release, .sysfs_ops = &cache_index_ops, .default_groups = cache_index_default_groups, diff --git a/arch/powerpc/kernel/secvar-sysfs.c b/arch/powerpc/kernel/secvar-sysfs.c index eb3c053f323f..fbeb1cbac01b 100644 --- a/arch/powerpc/kernel/secvar-sysfs.c +++ b/arch/powerpc/kernel/secvar-sysfs.c @@ -125,7 +125,7 @@ static const struct attribute_group secvar_attr_group = { }; __ATTRIBUTE_GROUPS(secvar_attr); -static struct kobj_type secvar_ktype = { +static const struct kobj_type secvar_ktype = { .sysfs_ops = &kobj_sysfs_ops, .default_groups = secvar_attr_groups, }; |