linux-kernel - Re: [PATCH] MIPS: oops when show backtrace of all active cpu

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Date:	Thu, 2 Aug 2012 12:45:11 +0800
From:	Fan Du <fan.du@...driver.com>
To:	Kevin Cernekee <cernekee@...il.com>
CC:	Fan Du <fdu@...driver.com>, <ralf@...ux-mips.org>,
	<linux-mips@...ux-mips.org>, <linux-kernel@...r.kernel.org>,
	vincent wen <vincentwenlinux@...il.com>
Subject: Re: [PATCH] MIPS: oops when show backtrace of all active cpu



On 2012年08月02日 12:18, Kevin Cernekee wrote:
> On Wed, Aug 1, 2012 at 8:31 PM, Fan Du<fdu@...driver.com>  wrote:
>> show_backtrace must have an valid task when calling unwind_stack,
>> so fix it by checking first.
> [...]
>> --- a/arch/mips/kernel/traps.c
>> +++ b/arch/mips/kernel/traps.c
>> @@ -151,6 +151,10 @@ static void show_backtrace(struct task_struct *task, const struct pt_regs *regs)
>>                  show_raw_backtrace(sp);
>>                  return;
>>          }
>> +
>> +       if (task == NULL)
>> +               task = current;
>> +
>>          printk("Call Trace:\n");
>>          do {
>>                  print_ip_sym(pc);
>
> FYI, a slightly different version of this change was accepted:
>
> https://patchwork.linux-mips.org/patch/3524/
>
>

Oh, Looks like I'm late :)
thanks anyway.


-- 

Love each day!
--fan
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