powerpc/hugetlb: Call mm_dec_nr_pmds() in hugetlb_free_pmd_range()

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Commit dc6c9a35b6 ("mm: account pmd page tables to the process")
added a counter that is incremented whenever a PMD is allocated and
decremented whenever a PMD is freed.  For hugepages on PPC, common code
is used to allocated PMDs, but arch-specific code is used to free PMDs.

This results in kernel output such as "BUG: non-zero nr_pmds on freeing
mm: 1" when using hugepages.

Update the PPC hugepage PMD freeing code to decrement the count, just
as the above commit did for free_pmd_range().

Fixes: dc6c9a35b6 ("mm: account pmd page tables to the process")
Signed-off-by: Scott Wood <scottwood@freescale.com>
Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Cc: stable@vger.kernel.org # 4.0.x

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This commit is contained in:

Scott Wood 2015-04-10 19:37:34 -05:00

parent 39a8804455

commit 50c6a665b3

1 changed files with 1 additions and 0 deletions

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arch/powerpc/mm/hugetlbpage.c

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