tree:   git://git.cmpxchg.org/linux-mmotm.git master
head:   59f7a5af1a6c9e19c6e5152f26548c494a2d7338
commit: c824a9dc5e8821ce083652d4f728e804161d3dd0 [162/365] mm: account pmd page tables to the process
config: tile-tilegx_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
  git checkout c824a9dc5e8821ce083652d4f728e804161d3dd0
  # save the attached .config to linux build tree
  make.cross ARCH=tile 

All warnings:

   mm/mmap.c: In function 'exit_mmap':
>> mm/mmap.c:2857:2: warning: right shift count >= width of type [enabled by default]

vim +2857 mm/mmap.c

  2841		free_pgtables(&tlb, vma, FIRST_USER_ADDRESS, USER_PGTABLES_CEILING);
  2842		tlb_finish_mmu(&tlb, 0, -1);
  2843	
  2844		/*
  2845		 * Walk the list again, actually closing and freeing it,
  2846		 * with preemption enabled, without holding any MM locks.
  2847		 */
  2848		while (vma) {
  2849			if (vma->vm_flags & VM_ACCOUNT)
  2850				nr_accounted += vma_pages(vma);
  2851			vma = remove_vma(vma);
  2852		}
  2853		vm_unacct_memory(nr_accounted);
  2854	
  2855		WARN_ON(atomic_long_read(&mm->nr_ptes) >
  2856				round_up(FIRST_USER_ADDRESS, PMD_SIZE) >> PMD_SHIFT);
> 2857		WARN_ON(mm_nr_pmds(mm) >
  2858				round_up(FIRST_USER_ADDRESS, PUD_SIZE) >> PUD_SHIFT);
  2859	}
  2860	
  2861	/* Insert vm structure into process list sorted by address
  2862	 * and into the inode's i_mmap tree.  If vm_file is non-NULL
  2863	 * then i_mmap_rwsem is taken here.
  2864	 */
  2865	int insert_vm_struct(struct mm_struct *mm, struct vm_area_struct *vma)

---
0-DAY kernel test infrastructure                Open Source Technology Center
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