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authorHeiko Carstens <heiko.carstens@de.ibm.com>2007-07-15 23:41:39 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-07-16 09:05:51 -0700
commit608e2619682e951f525b08e7a48669a3c0263b41 (patch)
tree034ec1a626c776da201c6664a0ac8b2ec0934167 /arch/x86_64/kernel/traps.c
parent94bed2a9c4ae980838003f5d32681eef794ecc28 (diff)
downloadlinux-2.6.34-ux500-608e2619682e951f525b08e7a48669a3c0263b41.tar.gz
generic bug: use show_regs() instead of dump_stack()
The current generic bug implementation has a call to dump_stack() in case a WARN_ON(whatever) gets hit. Since report_bug(), which calls dump_stack(), gets called from an exception handler we can do better: just pass the pt_regs structure to report_bug() and pass it to show_regs() in case of a warning. This will give more debug informations like register contents, etc... In addition this avoids some pointless lines that dump_stack() emits, since it includes a stack backtrace of the exception handler which is of no interest in case of a warning. E.g. on s390 the following lines are currently always present in a stack backtrace if dump_stack() gets called from report_bug(): [<000000000001517a>] show_trace+0x92/0xe8) [<0000000000015270>] show_stack+0xa0/0xd0 [<00000000000152ce>] dump_stack+0x2e/0x3c [<0000000000195450>] report_bug+0x98/0xf8 [<0000000000016cc8>] illegal_op+0x1fc/0x21c [<00000000000227d6>] sysc_return+0x0/0x10 Acked-by: Jeremy Fitzhardinge <jeremy@goop.org> Acked-by: Haavard Skinnemoen <hskinnemoen@atmel.com> Cc: Andi Kleen <ak@suse.de> Cc: Kyle McMartin <kyle@parisc-linux.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/x86_64/kernel/traps.c')
-rw-r--r--arch/x86_64/kernel/traps.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86_64/kernel/traps.c b/arch/x86_64/kernel/traps.c
index aac1c0be54c..7fa155c394d 100644
--- a/arch/x86_64/kernel/traps.c
+++ b/arch/x86_64/kernel/traps.c
@@ -531,7 +531,7 @@ void die(const char * str, struct pt_regs * regs, long err)
unsigned long flags = oops_begin();
if (!user_mode(regs))
- report_bug(regs->rip);
+ report_bug(regs->rip, regs);
__die(str, regs, err);
oops_end(flags);