linux-kernel - Re: [PATCH v2] MIPS: fix duplicate define

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Date:   Thu, 10 Nov 2016 20:23:58 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Sudip Mukherjee <sudipm.mukherjee@...il.com>
Cc:     kbuild-all@...org, Ralf Baechle <ralf@...ux-mips.org>,
        Paul Burton <paul.burton@...tec.com>,
        linux-kernel@...r.kernel.org, linux-mips@...ux-mips.org,
        james.hogan@...tec.com,
        Sudip Mukherjee <sudipm.mukherjee@...il.com>
Subject: Re: [PATCH v2] MIPS: fix duplicate define

Hi Sudip,

[auto build test ERROR on linus/master]
[also build test ERROR on v4.9-rc4 next-20161110]
[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/Sudip-Mukherjee/MIPS-fix-duplicate-define/20161110-044738
config: mips-ip27_defconfig (attached as .config)
compiler: mips64-linux-gnuabi64-gcc (Debian 6.1.1-9) 6.1.1 20160705
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=mips 

All errors (new ones prefixed by >>):

   In file included from arch/mips/include/asm/page.h:194:0,
                    from arch/mips/vdso/vdso.h:26,
                    from arch/mips/vdso/gettimeofday.c:11:
   arch/mips/include/asm/io.h: In function 'phys_to_virt':
>> arch/mips/include/asm/io.h:138:9: error: cast to pointer from integer of different size [-Werror=int-to-pointer-cast]
     return (void *)(address + PAGE_OFFSET - PHYS_OFFSET);
            ^
   arch/mips/include/asm/io.h: In function 'isa_bus_to_virt':
   arch/mips/include/asm/io.h:151:9: error: cast to pointer from integer of different size [-Werror=int-to-pointer-cast]
     return (void *)(address + PAGE_OFFSET);
            ^
   cc1: all warnings being treated as errors

vim +138 arch/mips/include/asm/io.h

^1da177e include/asm-mips/io.h Linus Torvalds 2005-04-16  122  }
^1da177e include/asm-mips/io.h Linus Torvalds 2005-04-16  123  
^1da177e include/asm-mips/io.h Linus Torvalds 2005-04-16  124  /*
^1da177e include/asm-mips/io.h Linus Torvalds 2005-04-16  125   *     phys_to_virt    -       map physical address to virtual
^1da177e include/asm-mips/io.h Linus Torvalds 2005-04-16  126   *     @address: address to remap
^1da177e include/asm-mips/io.h Linus Torvalds 2005-04-16  127   *
^1da177e include/asm-mips/io.h Linus Torvalds 2005-04-16  128   *     The returned virtual address is a current CPU mapping for
^1da177e include/asm-mips/io.h Linus Torvalds 2005-04-16  129   *     the memory address given. It is only valid to use this function on
^1da177e include/asm-mips/io.h Linus Torvalds 2005-04-16  130   *     addresses that have a kernel mapping
^1da177e include/asm-mips/io.h Linus Torvalds 2005-04-16  131   *
^1da177e include/asm-mips/io.h Linus Torvalds 2005-04-16  132   *     This function does not handle bus mappings for DMA transfers. In
^1da177e include/asm-mips/io.h Linus Torvalds 2005-04-16  133   *     almost all conceivable cases a device driver should not be using
^1da177e include/asm-mips/io.h Linus Torvalds 2005-04-16  134   *     this function
^1da177e include/asm-mips/io.h Linus Torvalds 2005-04-16  135   */
^1da177e include/asm-mips/io.h Linus Torvalds 2005-04-16  136  static inline void * phys_to_virt(unsigned long address)
^1da177e include/asm-mips/io.h Linus Torvalds 2005-04-16  137  {
6f284a2c include/asm-mips/io.h Franck Bui-Huu 2007-01-10 @138  	return (void *)(address + PAGE_OFFSET - PHYS_OFFSET);
^1da177e include/asm-mips/io.h Linus Torvalds 2005-04-16  139  }
^1da177e include/asm-mips/io.h Linus Torvalds 2005-04-16  140  
^1da177e include/asm-mips/io.h Linus Torvalds 2005-04-16  141  /*
^1da177e include/asm-mips/io.h Linus Torvalds 2005-04-16  142   * ISA I/O bus memory addresses are 1:1 with the physical address.
^1da177e include/asm-mips/io.h Linus Torvalds 2005-04-16  143   */
^1da177e include/asm-mips/io.h Linus Torvalds 2005-04-16  144  static inline unsigned long isa_virt_to_bus(volatile void * address)
^1da177e include/asm-mips/io.h Linus Torvalds 2005-04-16  145  {
^1da177e include/asm-mips/io.h Linus Torvalds 2005-04-16  146  	return (unsigned long)address - PAGE_OFFSET;

:::::: The code at line 138 was first introduced by commit
:::::: 6f284a2ce7b8bc49cb8455b1763357897a899abb [MIPS] FLATMEM: introduce PHYS_OFFSET.

:::::: TO: Franck Bui-Huu <fbuihuu@...il.com>
:::::: CC: Ralf Baechle <ralf@...ux-mips.org>

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