Messages in this thread Patch in this message | | | Date | Fri, 8 Dec 2017 20:13:18 +0900 | From | Jinbum Park <> | Subject | [kernel-hardening][PATCH] arm: mm: idmap: Mark variables as ro_after_init |
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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.
Signed-off-by: Jinbum Park <jinb.park7@gmail.com> --- arch/arm/mm/idmap.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/arm/mm/idmap.c b/arch/arm/mm/idmap.c index 10bfba8..1d1edd0 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, -- 1.9.1
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