Jun Sun wrote:
> 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
> 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.
Ignoring bus errors is usually not healthy, it indicates a problem, that I would
prefer we find, instead of ignoring it.
> --- 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
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