Hi Christophe,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on powerpc/next]
[also build test ERROR on v5.6-rc3 next-20200227]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url:    https://github.com/0day-ci/linux/commits/Christophe-Leroy/Reduce-ifdef-mess-in-ptrace/20200228-094814
base:   https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next
config: powerpc-defconfig (attached as .config)
compiler: powerpc64-linux-gcc (GCC) 7.5.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        GCC_VERSION=7.5.0 make.cross ARCH=powerpc 

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <redacted>

All errors (new ones prefixed by >>):

quoted

arch/powerpc/kernel/ptrace/ptrace-altivec.c:8:10: fatal error: ptrace_decl.h: No such file or directory

    #include "ptrace_decl.h"
             ^~~~~~~~~~~~~~~
   compilation terminated.

vim +8 arch/powerpc/kernel/ptrace/ptrace-altivec.c

     7	
   > 8	#include "ptrace_decl.h"
     9	

---
0-DAY CI Kernel Test Service, Intel Corporation
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