608e261968
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> |
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| .. | ||
| cpu | ||
| timers | ||
| vsyscall | ||
| Makefile | ||
| asm-offsets.c | ||
| cf-enabler.c | ||
| cpufreq.c | ||
| crash_dump.c | ||
| debugtraps.S | ||
| early_printk.c | ||
| entry-common.S | ||
| head.S | ||
| init_task.c | ||
| io.c | ||
| io_generic.c | ||
| irq.c | ||
| kgdb_jmp.S | ||
| kgdb_stub.c | ||
| machine_kexec.c | ||
| module.c | ||
| pm.c | ||
| process.c | ||
| ptrace.c | ||
| relocate_kernel.S | ||
| semaphore.c | ||
| setup.c | ||
| sh_bios.c | ||
| sh_ksyms.c | ||
| signal.c | ||
| smp.c | ||
| stacktrace.c | ||
| sys_sh.c | ||
| syscalls.S | ||
| time.c | ||
| traps.c | ||
| vmlinux.lds.S | ||