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.
--- 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))
+ die_if_kernel("no ll/sc emulation for kernel code", regs);