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powerpc/64e: Fix wrong test in __ptep_test_and_clear_young()

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[ Upstream commit 5ea0bbaa32 ]

Commit 45201c8794 ("powerpc/nohash: Remove hash related code from
nohash headers.") replaced:

  if ((pte_val(*ptep) & (_PAGE_ACCESSED | _PAGE_HASHPTE)) == 0)
	return 0;

By:

  if (pte_young(*ptep))
	return 0;

But it should be:

  if (!pte_young(*ptep))
	return 0;

Fix it.

Fixes: 45201c8794 ("powerpc/nohash: Remove hash related code from nohash headers.")
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/8bb7f06494e21adada724ede47a4c3d97e879d40.1695659959.git.christophe.leroy@csgroup.eu
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Christophe Leroy
2023-09-25 20:31:16 +02:00
committed by Greg Kroah-Hartman
parent 0afcc9d4a1
commit 54357fcafa
1 changed files with 1 additions and 1 deletions
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2
arch/powerpc/include/asm/nohash/64/pgtable.h
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@@ -197,7 +197,7 @@ static inline int __ptep_test_and_clear_young(struct mm_struct *mm,
{ {
unsigned long old; unsigned long old;
if (pte_young(*ptep)) if (!pte_young(*ptep))
return 0; return 0;
old = pte_update(mm, addr, ptep, _PAGE_ACCESSED, 0, 0); old = pte_update(mm, addr, ptep, _PAGE_ACCESSED, 0, 0);
return (old & _PAGE_ACCESSED) != 0; return (old & _PAGE_ACCESSED) != 0;