diff options
| author | Bibo Mao <maobibo@loongson.cn> | 2020-05-27 10:25:20 +0800 |
|---|---|---|
| committer | Thomas Bogendoerfer <tsbogend@alpha.franken.de> | 2020-05-27 13:07:09 +0200 |
| commit | 273b5fa00fadabd587fac858ea61a17b3653892d (patch) | |
| tree | 037132b19edac8ec710d7f4189201d46e155c39f | |
| parent | 44bf431b47b4298d8aaba7b02d0ad29fc609a03c (diff) | |
MIPS: mm: add page valid judgement in function pte_modify
If original PTE has _PAGE_ACCESSED bit set, and new pte has no
_PAGE_NO_READ bit set, we can add _PAGE_SILENT_READ bit to enable
page valid bit.
Signed-off-by: Bibo Mao <maobibo@loongson.cn>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
| -rw-r--r-- | arch/mips/include/asm/pgtable.h | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/arch/mips/include/asm/pgtable.h b/arch/mips/include/asm/pgtable.h index d9772aff2f02..85b39c9fd09e 100644 --- a/arch/mips/include/asm/pgtable.h +++ b/arch/mips/include/asm/pgtable.h @@ -532,8 +532,11 @@ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) #else static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) { - return __pte((pte_val(pte) & _PAGE_CHG_MASK) | - (pgprot_val(newprot) & ~_PAGE_CHG_MASK)); + pte_val(pte) &= _PAGE_CHG_MASK; + pte_val(pte) |= pgprot_val(newprot) & ~_PAGE_CHG_MASK; + if ((pte_val(pte) & _PAGE_ACCESSED) && !(pte_val(pte) & _PAGE_NO_READ)) + pte_val(pte) |= _PAGE_SILENT_READ; + return pte; } #endif |