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 <[email protected]>
:::::: CC: Ralf Baechle <[email protected]>

---
0-DAY kernel test infrastructure                Open Source Technology Center
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