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Re: [PATCH] Implement leftpad syscall

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Hi David,

[auto build test ERROR on v4.6-rc1]
[also build test ERROR on next-20160331]
[cannot apply to tip/x86/core]
[if your patch is applied to the wrong git tree, please drop us a note to help improving the system]

url:    https://github.com/0day-ci/linux/commits/Richard-Weinberger/Implement-leftpad-syscall/20160401-063620
config: microblaze-mmu_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=microblaze 

All errors (new ones prefixed by >>):

   kernel/sys.c: In function 'SYSC_leftpad':
>> kernel/sys.c:2441:2: error: implicit declaration of function 'strlen_user' [-Werror=implicit-function-declaration]
     size_t len = strlen_user(src);
     ^
   cc1: some warnings being treated as errors

vim +/strlen_user +2441 kernel/sys.c

  2435	
  2436	
  2437	SYSCALL_DEFINE4(leftpad, char *, src, char, pad, char *, dst, size_t, dst_len)
  2438	{
  2439		char *buf;
  2440		long ret;
> 2441		size_t len = strlen_user(src);
  2442		size_t pad_len = dst_len - len;
  2443	
  2444		if (dst_len <= len || dst_len > 4096) {

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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New syscall: leftpad() Richard Weinberger <richard@nod.at> - 2016-04-01 00:40 +0200
  [PATCH] Implement leftpad syscall Richard Weinberger <richard@nod.at> - 2016-04-01 00:40 +0200
    Re: [PATCH] Implement leftpad syscall "Michael Kerrisk (man-pages)" <mtk.manpages@gmail.com> - 2016-04-01 00:50 +0200
    Re: [PATCH] Implement leftpad syscall Greg KH <gregkh@linuxfoundation.org> - 2016-04-01 01:10 +0200
    Re: [PATCH] Implement leftpad syscall Frederic Weisbecker <fweisbec@gmail.com> - 2016-04-01 03:40 +0200
    Re: [PATCH] Implement leftpad syscall kbuild test robot <lkp@intel.com> - 2016-04-01 05:30 +0200
    Re: [PATCH] Implement leftpad syscall Richard Cochran <richardcochran@gmail.com> - 2016-04-01 09:00 +0200
    Re: [PATCH] Implement leftpad syscall Scotty Bauer <sbauer@eng.utah.edu> - 2016-04-01 09:20 +0200
  [PATCH] leftpad.2: Document new syscall Richard Weinberger <richard@nod.at> - 2016-04-01 00:40 +0200
  Re: New syscall: leftpad() Randy Dunlap <rdunlap@infradead.org> - 2016-04-01 01:40 +0200
    Re: New syscall: leftpad() Richard Weinberger <richard@nod.at> - 2016-04-01 10:10 +0200

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