[PATCH v1 1/2] s390/mm: fix storage key clearing for guest 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: 964c2c05c9f3 ("s390/mm: Clear huge page storage keys on enable_skey")
Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
---
arch/s390/mm/gmap.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/s390/mm/gmap.c b/arch/s390/mm/gmap.c
index 094b43b121cd..12d22a7fa32f 100644
--- a/arch/s390/mm/gmap.c
+++ b/arch/s390/mm/gmap.c
@@ -2661,7 +2661,7 @@ static int __s390_enable_skey_hugetlb(pte_t *pte, unsigned long addr,
return 0;

start = pmd_val(*pmd) & HPAGE_MASK;
- end = start + HPAGE_SIZE - 1;
+ end = start + HPAGE_SIZE;
__storage_key_init_range(start, end);
set_bit(PG_arch_1, &page->flags);
cond_resched();
--
2.44.0