linux-kernel - Re: [PATCH 1/2] iommu/vt-d: Fix crash when accessing VT-d sysfs entries

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Message-ID: <201703010825.4Q2UVVIO%fengguang.wu@intel.com>
Date:   Wed, 1 Mar 2017 08:19:30 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Joerg Roedel <joro@...tes.org>
Cc:     kbuild-all@...org, iommu@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org, Joerg Roedel <jroedel@...e.de>
Subject: Re: [PATCH 1/2] iommu/vt-d: Fix crash when accessing VT-d sysfs
 entries

Hi Joerg,

[auto build test ERROR on iommu/next]
[also build test ERROR on v4.10 next-20170228]
[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/Joerg-Roedel/iommu-vt-d-Fix-crash-when-accessing-VT-d-sysfs-entries/20170301-074355
base:   https://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu.git next
config: i386-defconfig (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

All error/warnings (new ones prefixed by >>):

   In file included from include/linux/list.h:8:0,
                    from include/linux/resource_ext.h:17,
                    from include/linux/acpi.h:26,
                    from drivers/gpu/drm/i915/i915_drv.c:30:
   include/linux/intel-iommu.h: In function 'dev_to_intel_iommu':
>> include/linux/intel-iommu.h:457:52: error: 'struct iommu_device' has no member named 'dev'
     return container_of(dev, struct intel_iommu, iommu.dev);
                                                       ^
   include/linux/kernel.h:850:29: note: in definition of macro 'container_of'
     const typeof( ((type *)0)->member ) *__mptr = (ptr); \
                                ^~~~~~
   include/linux/kernel.h:850:48: error: initialization from incompatible pointer type [-Werror=incompatible-pointer-types]
     const typeof( ((type *)0)->member ) *__mptr = (ptr); \
                                                   ^
>> include/linux/intel-iommu.h:457:9: note: in expansion of macro 'container_of'
     return container_of(dev, struct intel_iommu, iommu.dev);
            ^~~~~~~~~~~~
   In file included from include/linux/compiler.h:58:0,
                    from include/linux/ioport.h:12,
                    from include/linux/acpi.h:25,
                    from drivers/gpu/drm/i915/i915_drv.c:30:
>> include/linux/compiler-gcc.h:159:2: error: 'struct iommu_device' has no member named 'dev'
     __builtin_offsetof(a, b)
     ^
   include/linux/stddef.h:16:32: note: in expansion of macro '__compiler_offsetof'
    #define offsetof(TYPE, MEMBER) __compiler_offsetof(TYPE, MEMBER)
                                   ^~~~~~~~~~~~~~~~~~~
   include/linux/kernel.h:851:29: note: in expansion of macro 'offsetof'
     (type *)( (char *)__mptr - offsetof(type,member) );})
                                ^~~~~~~~
>> include/linux/intel-iommu.h:457:9: note: in expansion of macro 'container_of'
     return container_of(dev, struct intel_iommu, iommu.dev);
            ^~~~~~~~~~~~
   cc1: some warnings being treated as errors

vim +457 include/linux/intel-iommu.h

   451		if (!ecap_coherent(iommu->ecap))
   452			clflush_cache_range(addr, size);
   453	}
   454	
   455	static inline struct intel_iommu *dev_to_intel_iommu(struct device *dev)
   456	{
 > 457		return container_of(dev, struct intel_iommu, iommu.dev);
   458	}
   459	
   460	extern struct dmar_drhd_unit * dmar_find_matched_drhd_unit(struct pci_dev *dev);

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