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firmware: memmap: Constify memmap_ktype

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This 'memmap_ktype' is not modified. It is only used in
firmware_map_add_entry().

Constifying this structure and moving it to a read-only section,
and this can increase over all security.

```
[Before]
   text    data     bss     dec     hex filename
   4345     596      12    4953    1359 drivers/firmware/memmap.o

[After]
   text    data     bss     dec     hex filename
   4393     548      12    4953    1359 drivers/firmware/memmap.o
```

Signed-off-by: Kunwu Chan <chentao@kylinos.cn>
Link: https://lore.kernel.org/r/20240924030533.34407-1-chentao@kylinos.cn
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Kunwu Chan 2024-09-24 11:05:32 +08:00 committed by Greg Kroah-Hartman
parent a27b406a49
commit 619325ca7a
1 changed files with 1 additions and 1 deletions
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2
drivers/firmware/memmap.c
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@ -116,7 +116,7 @@ static void __meminit release_firmware_map_entry(struct kobject *kobj)
kfree(entry);
}
static struct kobj_type __refdata memmap_ktype = {
static const struct kobj_type memmap_ktype = {
.release = release_firmware_map_entry,
.sysfs_ops = &memmap_attr_ops,
.default_groups = def_groups,