From: Jun Sun <jsun@mvista.com>
To: "H. J. Lu" <hjl@lucon.org>
Cc: linux-mips@oss.sgi.com
Subject: Re: Malta bus error
Date: Thu, 18 Jul 2002 18:05:53 -0700 [thread overview]
Message-ID: <3D3765F1.6050606@mvista.com> (raw)
In-Reply-To: 20020718180759.A2091@lucon.org
H. J. Lu wrote:
> On Thu, Jul 18, 2002 at 05:20:28PM -0700, Jun Sun wrote:
>
>>I got the following bus error on Malta. Does anybody know what causes the
>>fault? Is there anyway to disable the error? Or we should install a malta
>>bus_error_handler() to discard this kind of error?
>>
>>Apparently the error has something to do with the code layout as it only
>>happens when I start to modify an unrelated function( do_ri()).
>>
>>I am using the latest linux_2_4 branch from oss.sgi.com CVS tree.
>>
>
>
> I got zero problems with 2.4 kernel on oss as of Jul 11 08:18.
>
Me neither, until I made the following change. I of course use my own config
file.
Using Malta's own BE handler to ignore bus error seems to fix the problem,
although I am not sure if it is the right fix.
Jun
--- arch/mips/kernel/traps.c.orig Thu Jul 18 15:39:50 2002
+++ arch/mips/kernel/traps.c Thu Jul 18 16:49:32 2002
@@ -614,8 +614,7 @@
*/
asmlinkage void do_ri(struct pt_regs *regs)
{
- if (!user_mode(regs))
- BUG();
+ die_if_kernel("no ll/sc emulation for kernel code", regs);
#ifndef CONFIG_CPU_HAS_LLSC
Jun
next prev parent reply other threads:[~2002-07-19 1:13 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-07-19 0:20 Malta bus error Jun Sun
2002-07-19 1:07 ` H. J. Lu
2002-07-19 1:05 ` Jun Sun [this message]
2002-07-19 6:39 ` Carsten Langgaard
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