Re: [PATCH 4.4-rc5 v22 4/4] ARM: Allow IPI_CPU_BACKTRACE to exploit FIQ

From: kbuild test robot <lkp@intel.com>
To: Daniel Thompson <daniel.thompson@linaro.org>
Cc: kbuild-all@01.org, Thomas Gleixner <tglx@linutronix.de>,
	Jason Cooper <jason@lakedaemon.net>,
	Russell King <linux@arm.linux.org.uk>,
	Marc Zyngier <marc.zyngier@arm.com>,
	Daniel Thompson <daniel.thompson@linaro.org>,
	Will Deacon <will.deacon@arm.com>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Stephen Boyd <sboyd@codeaurora.org>,
	John Stultz <john.stultz@linaro.org>,
	Steven Rostedt <rostedt@goodmis.org>,
	linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org, patches@linaro.org,
	linaro-kernel@lists.linaro.org,
	Sumit Semwal <sumit.semwal@linaro.org>,
	Dirk Behme <dirk.behme@de.bosch.com>,
	Daniel Drake <drake@endlessm.com>,
	Dmitry Pervushin <dpervushin@gmail.com>,
	Tim Sander <tim@krieglstein.org>, Petr Mladek <pmladek@suse.com>
Subject: Re: [PATCH 4.4-rc5 v22 4/4] ARM: Allow IPI_CPU_BACKTRACE to exploit FIQ
Date: Mon, 21 Dec 2015 06:12:05 +0800	[thread overview]
Message-ID: <201512210618.hMZqsBKl%fengguang.wu@intel.com> (raw)
In-Reply-To: <1450644757-18734-5-git-send-email-daniel.thompson@linaro.org>

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Hi Daniel,

[auto build test ERROR on v4.4-rc5]
[also build test ERROR on next-20151218]
[cannot apply to tip/irq/core]

url:    https://github.com/0day-ci/linux/commits/Daniel-Thompson/irq-arm-Use-FIQ-for-NMI-backtrace-when-possible/20151221-045854
config: arm-iop-adma (attached as .config)
reproduce:
        wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=arm 

All errors (new ones prefixed by >>):

   arch/arm/kernel/traps.c: In function 'handle_fiq_as_nmi':
>> arch/arm/kernel/traps.c:489:2: error: implicit declaration of function 'handle_arch_irq' [-Werror=implicit-function-declaration]
     handle_arch_irq(regs);
     ^
   cc1: some warnings being treated as errors

vim +/handle_arch_irq +489 arch/arm/kernel/traps.c

   483		 * Either the interrupt controller supports FIQ, meaning it will
   484		 * do the right thing with this call, or we will end up treating a
   485		 * spurious FIQ (which is normally fatal) as though it were an IRQ
   486		 * which, although it risks deadlock, still gives us a sporting
   487		 * chance of surviving long enough to log errors.
   488		 */
 > 489		handle_arch_irq(regs);
   490	
   491		nmi_exit();
   492	

---
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