[linux-next:master 13879/13946] fs/userfaultfd.c:1279:32: error: expected ')' before ';' token

* [linux-next:master 13879/13946] fs/userfaultfd.c:1279:32: error: expected ')' before ';' token
@ 2019-09-26 22:51 kbuild test robot
  0 siblings, 0 replies; only message in thread
From: kbuild test robot @ 2019-09-26 22:51 UTC (permalink / raw)
  To: Andrey Konovalov
  Cc: kbuild-all, Mark Brown, Mike Rapoport, Vincenzo Frascino,
	Catalin Marinas, Kees Cook, Andrew Morton,
	Linux Memory Management List

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   d47175169c28eedd2cc2ab8c01f38764cb0269cc
commit: c4da82d89ea3e689304f0ef783907dd23903b470 [13879/13946] userfaultfd: untag user pointers
config: sparc64-allmodconfig (attached as .config)
compiler: sparc64-linux-gcc (GCC) 7.4.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout c4da82d89ea3e689304f0ef783907dd23903b470
        # save the attached .config to linux build tree
        GCC_VERSION=7.4.0 make.cross ARCH=sparc64 

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@intel.com>

All error/warnings (new ones prefixed by >>):

   fs/userfaultfd.c: In function 'validate_range':
>> fs/userfaultfd.c:1279:32: error: expected ')' before ';' token
     *start = untagged_addr(*start);
                                   ^
>> fs/userfaultfd.c:1294:1: error: expected ';' before '}' token
    }
    ^
   fs/userfaultfd.c:1277:8: warning: unused variable 'task_size' [-Wunused-variable]
     __u64 task_size = mm->task_size;
           ^~~~~~~~~
>> fs/userfaultfd.c:1294:1: warning: no return statement in function returning non-void [-Wreturn-type]
    }
    ^

vim +1279 fs/userfaultfd.c

  1273	
  1274	static __always_inline int validate_range(struct mm_struct *mm,
  1275						  __u64 *start, __u64 len)
  1276	{
  1277		__u64 task_size = mm->task_size;
  1278	
> 1279		*start = untagged_addr(*start);
  1280	
  1281		if (*start & ~PAGE_MASK)
  1282			return -EINVAL;
  1283		if (len & ~PAGE_MASK)
  1284			return -EINVAL;
  1285		if (!len)
  1286			return -EINVAL;
  1287		if (*start < mmap_min_addr)
  1288			return -EINVAL;
  1289		if (*start >= task_size)
  1290			return -EINVAL;
  1291		if (len > task_size - *start)
  1292			return -EINVAL;
  1293		return 0;
> 1294	}
  1295	

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

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