[PATCH v1 2/2] s390/mm: fix clearing storage keys for huge pages

Claudio Imbrenda
2024-04-16T11:42:28Z

The current code works because __storage_key_init_range() will still loop
over every page in the range, but it is slower than using sske_frame().

Fixes: 3afdfca69870 ("s390/mm: Clear skeys for newly mapped huge guest pmds")
Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
---
arch/s390/mm/hugetlbpage.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/s390/mm/hugetlbpage.c b/arch/s390/mm/hugetlbpage.c
index c2e8242bd15d..dc3db86e13ff 100644
--- a/arch/s390/mm/hugetlbpage.c
+++ b/arch/s390/mm/hugetlbpage.c
@@ -139,7 +139,7 @@ static void clear_huge_pte_skeys(struct mm_struct *mm, unsigned long rste)
}

if (!test_and_set_bit(PG_arch_1, &page->flags))
- __storage_key_init_range(paddr, paddr + size - 1);
+ __storage_key_init_range(paddr, paddr + size);
}

void __set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
--
2.44.0