Commit 619325ca authored by Kunwu Chan's avatar Kunwu Chan Committed by Greg Kroah-Hartman
Browse files

firmware: memmap: Constify memmap_ktype 



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: default avatarKunwu Chan <chentao@kylinos.cn>
Link: https://lore.kernel.org/r/20240924030533.34407-1-chentao@kylinos.cn


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent a27b406a

drivers/firmware/memmap.c

+1 −1
Original line number Diff line number Diff line
@@ -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,