diff options
| author | Christophe Leroy <christophe.leroy@csgroup.eu> | 2023-09-25 20:31:16 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-10-19 23:11:08 +0200 |
| commit | 9baee1becd642fda751f5b2d43792af2143b3e41 (patch) | |
| tree | 313a5f7f3e96e1cb4b6fe0a217a256672ebf73aa | |
| parent | 909c0bfa08d565a9319de77a82710cc638e0a2c6 (diff) | |
powerpc/64e: Fix wrong test in __ptep_test_and_clear_young()
[ Upstream commit 5ea0bbaa32e8f54e9a57cfee4a3b8769b80be0d2 ]
Commit 45201c879469 ("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: 45201c879469 ("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>
| -rw-r--r-- | arch/powerpc/include/asm/nohash/64/pgtable.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/include/asm/nohash/64/pgtable.h b/arch/powerpc/include/asm/nohash/64/pgtable.h index 287e25864ffa..072048e723c9 100644 --- a/arch/powerpc/include/asm/nohash/64/pgtable.h +++ b/arch/powerpc/include/asm/nohash/64/pgtable.h @@ -197,7 +197,7 @@ static inline int __ptep_test_and_clear_young(struct mm_struct *mm, { unsigned long old; - if (pte_young(*ptep)) + if (!pte_young(*ptep)) return 0; old = pte_update(mm, addr, ptep, _PAGE_ACCESSED, 0, 0); return (old & _PAGE_ACCESSED) != 0; |