From: Jinbum Park <jinb.park7@gmail.com>
Date: Tue, 12 Dec 2017 00:25:30 +0000 (+0100)
Subject: ARM: 8734/1: mm: idmap: Mark variables as ro_after_init
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=6fbab054eccd14480d0c0805cab80db08e0fb3ee;p=linux.git

ARM: 8734/1: mm: idmap: Mark variables as ro_after_init

idmap_pgd, arch_phys_to_idmap_offset are setup once
while init stage, and never changed after that.
so, it is good candidate for __ro_after_init.

Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Jinbum Park <jinb.park7@gmail.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
---

diff --git a/arch/arm/mm/idmap.c b/arch/arm/mm/idmap.c
index 10bfba85eb96b..1d1edd0641995 100644
--- a/arch/arm/mm/idmap.c
+++ b/arch/arm/mm/idmap.c
@@ -16,8 +16,8 @@
  * are not supported on any CPU using the idmap tables as its current
  * page tables.
  */
-pgd_t *idmap_pgd;
-long long arch_phys_to_idmap_offset;
+pgd_t *idmap_pgd __ro_after_init;
+long long arch_phys_to_idmap_offset __ro_after_init;
 
 #ifdef CONFIG_ARM_LPAE
 static void idmap_add_pmd(pud_t *pud, unsigned long addr, unsigned long end,