| Message ID | 1590546320-21814-5-git-send-email-maobibo@loongson.cn (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | MIPS: page fault handling optimization | expand |
diff --git a/arch/mips/include/asm/pgtable.h b/arch/mips/include/asm/pgtable.h index d9772aff..85b39c9 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
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> --- arch/mips/include/asm/pgtable.h | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)