powerpc/thp: Use ACCESS_ONCE when loading pmdp

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commit 7e467245bf upstream.

We would get wrong results in compiler recomputed old_pmd. Avoid
that by using ACCESS_ONCE

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Aneesh Kumar K.V 2014-08-13 12:32:02 +05:30 • committed by Greg Kroah-Hartman

parent 5c37602618

commit 367136a453

1 changed files with 3 additions and 1 deletions

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arch/powerpc/mm/hugepage-hash64.c

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