From 468d991aa5a07ad8a1433351e84851a9d0ae4215 Mon Sep 17 00:00:00 2001
From: Jian Peng <jipeng2005@gmail.com>
Date: Tue, 17 May 2011 12:27:49 -0700
Subject: [PATCH] MIPS: topdown mmap support

This patch introduced topdown mmap support in user process address
space allocation policy.

Recently, we ran some large applications that use mmap heavily and
lead to OOM due to inflexible mmap allocation policy on MIPS32.

Since most other major archs supported it for years, it is reasonable
to follow the trend and reduce the pain of porting applications.

Due to cache aliasing concern, arch_get_unmapped_area_topdown() and
other helper functions are implemented in arch/mips/kernel/syscall.c.

Signed-off-by: Jian Peng <jipeng2005@gmail.com>
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2.47.3