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s390/kasan: cleanup setup of zero pgtable

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Fix variables initialization coding style and setup zero
pgtable same way region and segment pgtables are set up.

Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
This commit is contained in:
Alexander Gordeev 2022-12-09 22:09:44 +01:00 committed by Heiko Carstens
parent aae2f753d2
commit 8772555ad0
1 changed files with 5 additions and 7 deletions
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12
arch/s390/mm/kasan_init.c
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@ -251,19 +251,17 @@ static void __init kasan_early_detect_facilities(void)
void __init kasan_early_init(void)
{
unsigned long shadow_alloc_size;
unsigned long initrd_end;
unsigned long memsize;
unsigned long pgt_prot = pgprot_val(PAGE_KERNEL_RO);
pte_t pte_z;
pte_t pte_z = __pte(__pa(kasan_early_shadow_page) | pgprot_val(PAGE_KERNEL_RO));
pmd_t pmd_z = __pmd(__pa(kasan_early_shadow_pte) | _SEGMENT_ENTRY);
pud_t pud_z = __pud(__pa(kasan_early_shadow_pmd) | _REGION3_ENTRY);
p4d_t p4d_z = __p4d(__pa(kasan_early_shadow_pud) | _REGION2_ENTRY);
unsigned long shadow_alloc_size;
unsigned long initrd_end;
unsigned long memsize;
kasan_early_detect_facilities();
if (!has_nx)
pgt_prot &= ~_PAGE_NOEXEC;
pte_z = __pte(__pa(kasan_early_shadow_page) | pgt_prot);
pte_z = clear_pte_bit(pte_z, __pgprot(_PAGE_NOEXEC));
memsize = get_mem_detect_end();
if (!memsize)