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Date: Mon, 11 Sep 2017 07:24:54 +0200 From: Jiri Slaby <jslaby@...e.cz> To: Jibin Xu <jibin.xu@...driver.com>, gregkh@...uxfoundation.org Cc: rmk+kernel@...linux.org.uk, mingo@...e.hu, linux-arm-kernel@...ts.infradead.org, riel@...hat.com, linux-kernel@...r.kernel.org Subject: Re: [PATCH] sysrq : fix Show Regs call trace on ARM 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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