linux-kernel - Re: [PATCH v4 75/79] include/uapi/xen/privcmd.h: fix compilation in userspace

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Date:	Thu, 15 Oct 2015 18:07:42 +0800
From:	kbuild test robot <lkp@...el.com>
To:	Mikko Rapeli <mikko.rapeli@....fi>
Cc:	kbuild-all@...org, linux-kernel@...r.kernel.org,
	mikko.rapeli@....fi,
	Stefano Stabellini <stefano.stabellini@...citrix.com>,
	Russell King <linux@....linux.org.uk>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Boris Ostrovsky <boris.ostrovsky@...cle.com>,
	David Vrabel <david.vrabel@...rix.com>,
	xen-devel@...ts.xenproject.org,
	linux-arm-kernel@...ts.infradead.org, linux-api@...r.kernel.org
Subject: Re: [PATCH v4 75/79] include/uapi/xen/privcmd.h: fix compilation in
 userspace

Hi Mikko,

[auto build test ERROR on drm/drm-next -- if it's inappropriate base, please suggest rules for selecting the more suitable base]

url:    https://github.com/0day-ci/linux/commits/Mikko-Rapeli/Userspace-compile-test-and-fixes-for-exported-uapi-header-files/20151015-150653
config: arm64-allmodconfig (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=arm64 

All errors (new ones prefixed by >>):

   In file included from drivers/xen/privcmd.c:33:0:
>> include/uapi/xen/privcmd.h:48:23: error: conflicting types for 'xen_pfn_t'
    typedef unsigned long xen_pfn_t;
                          ^
   In file included from arch/arm64/include/asm/xen/interface.h:1:0,
                    from include/xen/interface/xen.h:30,
                    from include/xen/xen.h:23,
                    from arch/arm64/include/asm/io.h:35,
                    from include/linux/bio.h:30,
                    from include/linux/writeback.h:192,
                    from include/linux/memcontrol.h:30,
                    from include/linux/swap.h:8,
                    from drivers/xen/privcmd.c:20:
   arch/arm64/include/../../arm/include/asm/xen/interface.h:39:15: note: previous declaration of 'xen_pfn_t' was here
    typedef __u64 xen_pfn_t;
                  ^

vim +/xen_pfn_t +48 include/uapi/xen/privcmd.h

    42	#endif /* domid_t */
    43	
    44	#ifndef xen_pfn_t
    45	#if (defined __ARMEL__ || defined __ARMEB__)
    46	typedef __u64 xen_pfn_t;
    47	#else
  > 48	typedef unsigned long xen_pfn_t;
    49	#endif /* (defined __ARMEL__ || defined __ARMEB__) */
    50	#endif /* xen_pfn_t */
    51	

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