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(parent: 4995128) | patch
powerpc/thp: Add write barrier after updating the valid bit
authorAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Wed, 13 Aug 2014 07:01:57 +0000 (12:31 +0530)
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>
Wed, 13 Aug 2014 08:20:37 +0000 (18:20 +1000)
commit544dfb514de916cb0af5082e41d2bab9f44cd84e
tree92b61ca0ea8b8cbd4ec4c9934aafa39eab29fd4dtree | snapshot
parent499512894a32f79ff147487fae85ba2089d671b2commit | diff
powerpc/thp: Add write barrier after updating the valid bit

With hugepages, we store the hpte valid information in the pte page
whose address is stored in the second half of the PMD. Use a
write barrier to make sure clearing pmd busy bit and updating
hpte valid info are ordered properly.

CC: <stable@vger.kernel.org>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
arch/powerpc/mm/hugepage-hash64.c diff | blob | history
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