From: Michal Simek <monstr@monstr.eu>
Date: Mon, 24 May 2010 10:13:24 +0000 (+0200)
Subject: microblaze: Fix copy_to_user_page macro
X-Git-Tag: v2.6.36-rc1~560^2~43
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6847ba91a190fe41d21779d6b382b47b2f4c50f4;p=pandora-kernel.git

microblaze: Fix copy_to_user_page macro

copy_to_user_page macro is used in mm/memory.c:access_process_vm
function. This function is called from ptrace code (POKETEXT, POKEDATA)
which write data to memory. Microblaze handle physical address for
caches that's why there is virt_to_phys conversion.

There is potential one location which can caused the problem on WB system.

The important is take a look at write PTRACEs requests
(POKE/TEXT, DATA, USR).

Note:
Majority of Microblaze PTRACE code is moved to generic location
in newer kernel version that's why this solution should work on
the newest kernel version too.

linux/io.h is in cacheflush because of mm/nommu.c

Tested on a WB system - hello world debugging.

Signed-off-by: Michal Simek <monstr@monstr.eu>
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