This is again a tricky include file ordering when linux/compat.h is
included instead of asm/compat.h. is_compat_task() is unconditionally
defined in linux/compat.h as a macro which conflicts with inline
function define in asm/compat.h for this arch.
As before, I will do the simple thing here and leave the asm/compat.h
to keep this series simple.
I will submit follow up patches to eliminate direct inclusion asm/compat.h.

I will include this also in the update.

-Deepa

On Tue, Mar 13, 2018 at 8:30 AM, kbuild test robot <l...@intel.com> wrote:
> Hi Deepa,
>
> Thank you for the patch! Yet something to improve:
>
> [auto build test ERROR on ]
>
> url:    
> https://github.com/0day-ci/linux/commits/Deepa-Dinamani/posix_clocks-Prepare-syscalls-for-64-bit-time_t-conversion/20180313-203305
> base:
> config: powerpc-iss476-smp_defconfig (attached as .config)
> compiler: powerpc-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0
> 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
>         make.cross ARCH=powerpc
>
> All errors (new ones prefixed by >>):
>
>    arch/powerpc/oprofile/backtrace.c: In function 'user_getsp32':
>>> arch/powerpc/oprofile/backtrace.c:31:19: error: implicit declaration of 
>>> function 'compat_ptr'; did you mean 'complete'? 
>>> [-Werror=implicit-function-declaration]
>      void __user *p = compat_ptr(sp);
>                       ^~~~~~~~~~
>                       complete
>>> arch/powerpc/oprofile/backtrace.c:31:19: error: initialization makes 
>>> pointer from integer without a cast [-Werror=int-conversion]
>    cc1: all warnings being treated as errors
>
> vim +31 arch/powerpc/oprofile/backtrace.c
>
> 6c6bd754 Brian Rogan 2006-03-27  27
> 6c6bd754 Brian Rogan 2006-03-27  28  static unsigned int 
> user_getsp32(unsigned int sp, int is_first)
> 6c6bd754 Brian Rogan 2006-03-27  29  {
> 6c6bd754 Brian Rogan 2006-03-27  30     unsigned int stack_frame[2];
> 62034f03 Al Viro     2006-09-23 @31     void __user *p = compat_ptr(sp);
> 6c6bd754 Brian Rogan 2006-03-27  32
> 62034f03 Al Viro     2006-09-23  33     if (!access_ok(VERIFY_READ, p, 
> sizeof(stack_frame)))
> 6c6bd754 Brian Rogan 2006-03-27  34             return 0;
> 6c6bd754 Brian Rogan 2006-03-27  35
> 6c6bd754 Brian Rogan 2006-03-27  36     /*
> 6c6bd754 Brian Rogan 2006-03-27  37      * The most likely reason for this is 
> that we returned -EFAULT,
> 6c6bd754 Brian Rogan 2006-03-27  38      * which means that we've done all 
> that we can do from
> 6c6bd754 Brian Rogan 2006-03-27  39      * interrupt context.
> 6c6bd754 Brian Rogan 2006-03-27  40      */
> 62034f03 Al Viro     2006-09-23  41     if 
> (__copy_from_user_inatomic(stack_frame, p, sizeof(stack_frame)))
> 6c6bd754 Brian Rogan 2006-03-27  42             return 0;
> 6c6bd754 Brian Rogan 2006-03-27  43
> 6c6bd754 Brian Rogan 2006-03-27  44     if (!is_first)
> 6c6bd754 Brian Rogan 2006-03-27  45             
> oprofile_add_trace(STACK_LR32(stack_frame));
> 6c6bd754 Brian Rogan 2006-03-27  46
> 6c6bd754 Brian Rogan 2006-03-27  47     /*
> 6c6bd754 Brian Rogan 2006-03-27  48      * We do not enforce increasing stack 
> addresses here because
> 6c6bd754 Brian Rogan 2006-03-27  49      * we may transition to a different 
> stack, eg a signal handler.
> 6c6bd754 Brian Rogan 2006-03-27  50      */
> 6c6bd754 Brian Rogan 2006-03-27  51     return STACK_SP(stack_frame);
> 6c6bd754 Brian Rogan 2006-03-27  52  }
> 6c6bd754 Brian Rogan 2006-03-27  53
>
> :::::: The code at line 31 was first introduced by commit
> :::::: 62034f03380a64c0144b6721f4a2aa55d65346c1 [POWERPC] powerpc oprofile 
> __user annotations
>
> :::::: TO: Al Viro <v...@ftp.linux.org.uk>
> :::::: CC: Paul Mackerras <pau...@samba.org>
>
> ---
> 0-DAY kernel test infrastructure                Open Source Technology Center
> https://lists.01.org/pipermail/kbuild-all                   Intel Corporation
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