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| author | Christophe Leroy | 2023-09-25 20:31:15 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman | 2023-10-19 23:08:58 +0200 |
| commit | 0afcc9d4a16d6872d911158018948351b4ac3c44 (patch) | |
| tree | 953c08b24b1754cba5c1e350cc95c1452b87534c /README | |
| parent | 9a995e11b23f4afb4fe50e7d4d420e3ddcaa35a1 (diff) | |
powerpc/8xx: Fix pte_access_permitted() for PAGE_NONE
[ Upstream commit 5d9cea8a552ee122e21fbd5a3c5d4eb85f648e06 ]
On 8xx, PAGE_NONE is handled by setting _PAGE_NA instead of clearing
_PAGE_USER.
But then pte_user() returns 1 also for PAGE_NONE.
As _PAGE_NA prevent reads, add a specific version of pte_read()
that returns 0 when _PAGE_NA is set instead of always returning 1.
Fixes: 351750331fc1 ("powerpc/mm: Introduce _PAGE_NA")
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/57bcfbe578e43123f9ed73e040229b80f1ad56ec.1695659959.git.christophe.leroy@csgroup.eu
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'README')
0 files changed, 0 insertions, 0 deletions