Re: [PATCH V2 1/3] x86/Hyper-V: Set x2apic destination mode to physical when x2apic is available

From: kbuild test robot <lkp@intel.com>
To: lantianyu1986@gmail.com
Cc: linux-kernel@vger.kernel.org, hpa@zytor.com,
	mchehab+samsung@kernel.org, sashal@kernel.org,
	sthemmin@microsoft.com, joro@8bytes.org, x86@kernel.org,
	michael.h.kelley@microsoft.com, mingo@redhat.com,
	dan.carpenter@oracle.com, Lan Tianyu <Tianyu.Lan@microsoft.com>,
	arnd@arndb.de, haiyangz@microsoft.com,
	alex.williamson@redhat.com, bp@alien8.de, tglx@linutronix.de,
	vkuznets@redhat.com, gregkh@linuxfoundation.org,
	nicolas.ferre@microchip.com, iommu@lists.linux-foundation.org,
	kbuild-all@01.org, devel@linuxdriverproject.org,
	akpm@linux-foundation.org, davem@davemloft.net
Subject: Re: [PATCH V2 1/3] x86/Hyper-V: Set x2apic destination mode to physical when x2apic is available
Date: Mon, 4 Feb 2019 14:55:56 +0800	[thread overview]
Message-ID: <201902041440.LNfYOKmK%fengguang.wu@intel.com> (raw)
In-Reply-To: <1549113287-5606-2-git-send-email-Tianyu.Lan@microsoft.com>

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Hi Lan,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on iommu/next]
[also build test ERROR on v5.0-rc4 next-20190204]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/lantianyu1986-gmail-com/x86-Hyper-V-IOMMU-Add-Hyper-V-IOMMU-driver-to-support-x2apic-mode/20190204-132009
base:   https://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu.git next
config: i386-randconfig-a3-02040849 (attached as .config)
compiler: gcc-4.9 (Debian 4.9.4-2) 4.9.4
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

All errors (new ones prefixed by >>):

   arch/x86/kernel/cpu/mshyperv.c: In function 'ms_hyperv_init_platform':
>> arch/x86/kernel/cpu/mshyperv.c:339:3: error: 'x2apic_phys' undeclared (first use in this function)
      x2apic_phys = 1;
      ^
   arch/x86/kernel/cpu/mshyperv.c:339:3: note: each undeclared identifier is reported only once for each function it appears in

vim +/x2apic_phys +339 arch/x86/kernel/cpu/mshyperv.c

   331	
   332	/*
   333	 * Hyper-V doesn't provide irq remapping for IO-APIC. To enable x2apic,
   334	 * set x2apic destination mode to physcial mode when x2apic is available
   335	 * and Hyper-V IOMMU driver makes sure cpus assigned with IO-APIC irqs
   336	 * have 8-bit APIC id.
   337	 */
   338		if (IS_ENABLED(CONFIG_HYPERV_IOMMU) && x2apic_supported())
 > 339			x2apic_phys = 1;
   340	

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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