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SubjectRe: [PATCH v4 02/10] include: Move compat_timespec/ timeval to compat_time.h
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 <lkp@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 <viro@ftp.linux.org.uk>
> :::::: CC: Paul Mackerras <paulus@samba.org>
>
> ---
> 0-DAY kernel test infrastructure Open Source Technology Center
> https://lists.01.org/pipermail/kbuild-all Intel Corporation

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