From 910e46da4b4e93d56ffea318c64afa41868d5e6d Mon Sep 17 00:00:00 2001
From: Sonic Zhang <sonic.adi@gmail.com>
Date: Wed, 27 Sep 2006 01:50:17 -0700
Subject: [PATCH] [PATCH] Check if start address is in vma region in NOMMU
 function get_user_pages()

In NOMMU arch, if run "cat /proc/self/mem", data from physical address 0
are read.  This behavior is different from MMU arch.  In IA32, message
"cat: /proc/self/mem: Input/output error" is reported.

This issue is rootcaused by not validate the start address in NOMMU
function get_user_pages().  Following patch solves this issue.

Signed-off-by: Sonic Zhang <sonic.adi@gmail.com>
Cc: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---
Reading git-format-patch failed