powerpc/mm: Add memory barrier in __hugepte_alloc()

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__hugepte_alloc() uses kmem_cache_zalloc() to allocate a zeroed PTE
and proceeds to use the newly allocated PTE. Add a memory barrier to
make sure that the other CPUs see a properly initialized PTE.

Based on a fix suggested by James Dykman.

Reported-by: James Dykman <jdykman@us.ibm.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Tested-by: James Dykman <jdykman@us.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

...

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Sukadev Bhattiprolu 2016-03-24 02:07:57 -04:00 • committed by Michael Ellerman

parent 31278b17a0

commit 0eab46be21

1 changed files with 7 additions and 0 deletions

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arch/powerpc/mm/hugetlbpage.c

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