[mmotm:master 230/459] mm/gup.c:208: error: size of array 'type name' is negative

[mmotm:master 230/459] mm/gup.c:208: error: size of array 'type name' is negative

[kbuild test robot]

tree:   git://git.cmpxchg.org/linux-mmotm.git master
head:   9567896580328249f6519fda78cf9fe185a8486d
commit: 849ba771e4fd9d334940e79d19c824608d06d393 [230/459] compiler.h: don't use temporary variable in __compiletime_assert()
config: make ARCH=avr32 atngw100_defconfig

All error/warnings:

   mm/gup.c: In function 'follow_page_mask':
>> mm/gup.c:208: error: size of array 'type name' is negative
--
   mm/memory.c: In function 'copy_pmd_range':
>> mm/memory.c:965: error: size of array 'type name' is negative
   mm/memory.c: In function 'zap_pmd_range':
>> mm/memory.c:1232: error: size of array 'type name' is negative
--
   mm/mprotect.c: In function 'change_pmd_range':
>> mm/mprotect.c:164: error: size of array 'type name' is negative
>> mm/mprotect.c:171: error: size of array 'type name' is negative
>> mm/mprotect.c:172: error: size of array 'type name' is negative
--
   mm/mremap.c: In function 'move_page_tables':
>> mm/mremap.c:197: error: size of array 'type name' is negative
--
   mm/pgtable-generic.c: In function 'pmdp_clear_flush_young':
>> mm/pgtable-generic.c:104: error: size of array 'type name' is negative
--
   fs/proc/task_mmu.c: In function 'smaps_pmd':
>> fs/proc/task_mmu.c:502: error: size of array 'type name' is negative
>> fs/proc/task_mmu.c:504: error: size of array 'type name' is negative

vim +208 mm/gup.c

cd31ead0 Kirill A. Shutemov 2014-05-10  192  	if ((flags & FOLL_NUMA) && pmd_numa(*pmd))
cd31ead0 Kirill A. Shutemov 2014-05-10  193  		return no_page_table(vma, flags);
cd31ead0 Kirill A. Shutemov 2014-05-10  194  	if (pmd_trans_huge(*pmd)) {
cd31ead0 Kirill A. Shutemov 2014-05-10  195  		if (flags & FOLL_SPLIT) {
cd31ead0 Kirill A. Shutemov 2014-05-10  196  			split_huge_page_pmd(vma, address, pmd);
cd31ead0 Kirill A. Shutemov 2014-05-10  197  			return follow_page_pte(vma, address, pmd, flags);
cd31ead0 Kirill A. Shutemov 2014-05-10  198  		}
cd31ead0 Kirill A. Shutemov 2014-05-10  199  		ptl = pmd_lock(mm, pmd);
cd31ead0 Kirill A. Shutemov 2014-05-10  200  		if (likely(pmd_trans_huge(*pmd))) {
cd31ead0 Kirill A. Shutemov 2014-05-10  201  			if (unlikely(pmd_trans_splitting(*pmd))) {
cd31ead0 Kirill A. Shutemov 2014-05-10  202  				spin_unlock(ptl);
cd31ead0 Kirill A. Shutemov 2014-05-10  203  				wait_split_huge_page(vma->anon_vma, pmd);
cd31ead0 Kirill A. Shutemov 2014-05-10  204  			} else {
cd31ead0 Kirill A. Shutemov 2014-05-10  205  				page = follow_trans_huge_pmd(vma, address,
cd31ead0 Kirill A. Shutemov 2014-05-10  206  							     pmd, flags);
cd31ead0 Kirill A. Shutemov 2014-05-10  207  				spin_unlock(ptl);
cd31ead0 Kirill A. Shutemov 2014-05-10 @208  				*page_mask = HPAGE_PMD_NR - 1;
cd31ead0 Kirill A. Shutemov 2014-05-10  209  				return page;
cd31ead0 Kirill A. Shutemov 2014-05-10  210  			}
cd31ead0 Kirill A. Shutemov 2014-05-10  211  		} else
cd31ead0 Kirill A. Shutemov 2014-05-10  212  			spin_unlock(ptl);
cd31ead0 Kirill A. Shutemov 2014-05-10  213  	}
cd31ead0 Kirill A. Shutemov 2014-05-10  214  	return follow_page_pte(vma, address, pmd, flags);
55b65f76 Kirill A. Shutemov 2014-05-10  215  }
55b65f76 Kirill A. Shutemov 2014-05-10  216  

:::::: The code at line 208 was first introduced by commit
:::::: cd31ead03cee7e815634acb9c0c8fc58eac73409 mm: cleanup follow_page_mask()

:::::: TO: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
:::::: CC: Johannes Weiner <hannes@cmpxchg.org>

---
0-DAY kernel build testing backend              Open Source Technology Center
http://lists.01.org/mailman/listinfo/kbuild                 Intel Corporation

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