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

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Date:   Thu, 12 Mar 2020 18:31:42 +1100
From:   Stephen Rothwell <sfr@...b.auug.org.au>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     Linux Next Mailing List <linux-next@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Mike Kravetz <mike.kravetz@...cle.com>
Subject: linux-next: build warning after merge of the akpm-current tree

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

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