mm/memory.c: Add memory read privilege on page fault handling

Here add pte_sw_mkyoung function to make page readable on MIPS
platform during page fault handling. This patch improves page
fault latency about 10% on my MIPS machine with lmbench
lat_pagefault case.

It is noop function on other arches, there is no negative
influence on those architectures.

Signed-off-by: Bibo Mao <[email protected]>
Acked-by: Andrew Morton <[email protected]>
Signed-off-by: Thomas Bogendoerfer <[email protected]>

0 files changed, 0 insertions, 0 deletions