Subject: linux-next: build warning after merge of the akpm-current tree

From: Stephen Rothwell <[email-masked]>
Date: Thu, 12 Mar 2020 18:31:42 +1100

Hi all,

After merging the akpm-current tree, today's linux-next build (powerpc
ppc64_defconfig) produced this warning:

fs/hugetlbfs/inode.c: In function 'remove_inode_hugepages':
fs/hugetlbfs/inode.c:460:44: warning: 'hash' may be used uninitialized in this function [-Wmaybe-uninitialized]
  460 |     mutex_unlock(&hugetlb_fault_mutex_table[hash]);
      |                                            ^
fs/hugetlbfs/inode.c:463:5: warning: 'index' may be used uninitialized in this function [-Wmaybe-uninitialized]
  463 |     hugetlb_vmdelete_list(&mapping->i_mmap,
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  464 |      index * pages_per_huge_page(h),
      |      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  465 |      (index + 1) * pages_per_huge_page(h));
      |      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Introduced by commit

  6fdc8f8d1781 ("hugetlbfs: use i_mmap_rwsem to address page fault/truncate race")

-- 
Cheers,
Stephen Rothwell