On 10/08/2015 07:12 AM, kbuild test robot wrote:
Hi Hannes,

[auto build test WARNING on net-next/master -- if it's inappropriate base, 
please ignore]

config: mips-ip27_defconfig (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=mips

All warnings (new ones prefixed by >>):

    mips-linux-gnu-ld: lib/lockref.o: warning: Inconsistent ISA between e_flags 
and .MIPS.abiflags
    mips-linux-gnu-ld: lib/lockref.o: warning: Inconsistent ISA extensions 
between e_flags and .MIPS.abiflags
[...]
    mips-linux-gnu-ld: lib/reciprocal_div.o: warning: Inconsistent ISA between 
e_flags and .MIPS.abiflags
    mips-linux-gnu-ld: lib/reciprocal_div.o: warning: Inconsistent ISA 
extensions between e_flags and .MIPS.abiflags
mips-linux-gnu-ld: lib/once.o: warning: Inconsistent ISA between e_flags and 
.MIPS.abiflags
mips-linux-gnu-ld: lib/once.o: warning: Inconsistent ISA extensions between 
e_flags and .MIPS.abiflags

Looks like a known issue on MIPS given the warning is not new also on other 
object
files. Here was what was discussed recently on this subject on a refactoring 
patch
from David Ahern:

  https://patchwork.ozlabs.org/patch/525102/

Thanks!

    mips-linux-gnu-ld: lib/string_helpers.o: warning: Inconsistent ISA between 
e_flags and .MIPS.abiflags
    mips-linux-gnu-ld: lib/string_helpers.o: warning: Inconsistent ISA 
extensions between e_flags and .MIPS.abiflags
[...]
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