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xtensa: don't clear swapper_pg_dir in paging_init
author
Max Filippov
<jcmvbkbc@gmail.com>
Sat, 16 Dec 2017 04:46:55 +0000
(20:46 -0800)
committer
Max Filippov
<jcmvbkbc@gmail.com>
Sun, 17 Dec 2017 06:37:11 +0000
(22:37 -0800)
swapper_pg_dir is located in the .bss, so it's zero-initialized anyway.
With KASAN enabled paging_init will be called after KASAN
initialization, it must not erase page directory entries set up for
KASAN shadow map.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
arch/xtensa/mm/mmu.c
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diff --git
a/arch/xtensa/mm/mmu.c
b/arch/xtensa/mm/mmu.c
index
54c01e3
..
9d1ecfc
100644
(file)
--- a/
arch/xtensa/mm/mmu.c
+++ b/
arch/xtensa/mm/mmu.c
@@
-56,7
+56,6
@@
static void __init fixedrange_init(void)
void __init paging_init(void)
{
- memset(swapper_pg_dir, 0, PAGE_SIZE);
#ifdef CONFIG_HIGHMEM
fixedrange_init();
pkmap_page_table = init_pmd(PKMAP_BASE, LAST_PKMAP);