diff options
| author | David S. Miller <davem@davemloft.net> | 2009-09-11 20:35:13 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-09-11 20:35:13 -0700 |
| commit | cabc5c0f7fa1342049042d6e147db5a73773955b (patch) | |
| tree | 2be09ae1777d580c7dfe05d6d5b76e57281ec447 /drivers/char/sysrq.c | |
| parent | b73d884756303316ead4cd7dad51236b2a515a1a (diff) | |
| parent | 86d710146fb9975f04c505ec78caa43d227c1018 (diff) | |
| download | linux-cabc5c0f7fa1342049042d6e147db5a73773955b.tar.bz2 | |
Merge branch 'master' of /home/davem/src/GIT/linux-2.6/
Conflicts:
arch/sparc/Kconfig
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 5d7a02f63e1c..50eecfe1d724 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 = { |