diff options
| author | Ingo Molnar <mingo@elte.hu> | 2009-09-15 12:18:15 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-09-15 12:18:15 +0200 |
| commit | dca2d6ac09d9ef59ff46820d4f0c94b08a671202 (patch) | |
| tree | fdec753b842dad09e3a4151954fab3eb5c43500d /drivers/char/sysrq.c | |
| parent | d6a65dffb30d8636b1e5d4c201564ef401a246cf (diff) | |
| parent | 18240904960a39e582ced8ba8ececb10b8c22dd3 (diff) | |
Merge branch 'linus' into tracing/hw-breakpoints
Conflicts:
arch/x86/kernel/process_64.c
Semantic conflict fixed in:
arch/x86/kvm/x86.c
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'drivers/char/sysrq.c')
| -rw-r--r-- | drivers/char/sysrq.c | 19 |
1 files changed, 14 insertions, 5 deletions
diff --git a/drivers/char/sysrq.c b/drivers/char/sysrq.c index 5d7a02f63e1..50eecfe1d72 100644 --- a/drivers/char/sysrq.c +++ b/drivers/char/sysrq.c @@ -24,6 +24,7 @@ #include <linux/sysrq.h> #include <linux/kbd_kern.h> #include <linux/proc_fs.h> +#include <linux/nmi.h> #include <linux/quotaops.h> #include <linux/perf_counter.h> #include <linux/kernel.h> @@ -222,12 +223,20 @@ static DECLARE_WORK(sysrq_showallcpus, sysrq_showregs_othercpus); static void sysrq_handle_showallcpus(int key, struct tty_struct *tty) { - struct pt_regs *regs = get_irq_regs(); - if (regs) { - printk(KERN_INFO "CPU%d:\n", smp_processor_id()); - show_regs(regs); + /* + * Fall back to the workqueue based printing if the + * backtrace printing did not succeed or the + * architecture has no support for it: + */ + if (!trigger_all_cpu_backtrace()) { + struct pt_regs *regs = get_irq_regs(); + + if (regs) { + printk(KERN_INFO "CPU%d:\n", smp_processor_id()); + show_regs(regs); + } + schedule_work(&sysrq_showallcpus); } - schedule_work(&sysrq_showallcpus); } static struct sysrq_key_op sysrq_showallcpus_op = { |