From: Wu Zhangjin <wuzhangjin@gmail.com>
Date: Fri, 14 May 2010 11:08:29 +0000 (+0800)
Subject: MIPS: Tracing: Fix argument passing of the 32bit support with gcc 4.5
X-Git-Tag: v2.6.35-rc5~20^2~11
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=56b49cd35fd56e29adb8f97ba051a1670d24d133;p=pandora-kernel.git

MIPS: Tracing: Fix argument passing of the 32bit support with gcc 4.5

As documented in the GCC 4.5 docs [1] -mmcount-ra-address uses register
$12 to pass the stack offset of the return address to the _mcount function.
On 64-bit kernels $12 is t0 but in 32-bit kernels it is t4 so we need to
use $12 instead of t0 here to be correct for both kernel types.

[1] GCC documentation: MIPS Options
http://gcc.gnu.org/onlinedocs/gcc/MIPS-Options.html

Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
Cc: linux-mips <linux-mips@linux-mips.org>
Cc: David Daney <david.s.daney@gmail.com>
Patchwork: http://patchwork.linux-mips.org/patch/1227/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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