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SubjectRe: [PATCH v4 02/10] include: Move compat_timespec/ timeval to compat_time.h
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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