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SubjectRe: [PATCH] sysrq : fix Show Regs call trace on ARM
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On 09/11/2017, 05:11 AM, Jibin Xu wrote:
...
> --- a/drivers/tty/sysrq.c
> +++ b/drivers/tty/sysrq.c
> @@ -245,8 +245,10 @@ static void sysrq_handle_showallcpus(int key)
> * architecture has no support for it:
> */
> if (!trigger_all_cpu_backtrace()) {
> - struct pt_regs *regs = get_irq_regs();
> + struct pt_regs *regs = NULL;
>
> + if (in_irq())
> + regs = get_irq_regs();

Maybe a stupid question: how does get_irq_regs() behave in the softirq
context? I.e. what about s/in_irq/in_interrupt/?

thanks,
--
js
suse labs

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