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authorAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>2014-02-12 09:13:36 +0530
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2014-02-17 11:19:35 +1100
commit88247e8d7ba6639f2c199e147ebbc91f7673150c (patch)
treebceaa92e71d6c0dfd668f84f188e0ac8ec666504 /mm/mprotect.c
parent49d9684a54d21930372b7fb0d3d7b5617f621706 (diff)
powerpc/mm: Add new "set" flag argument to pte/pmd update function
pte_update() is a powerpc-ism used to change the bits of a PTE when the access permission is being restricted (a flush is potentially needed). It uses atomic operations on when needed and handles the hash synchronization on hash based processors. It is currently only used to clear PTE bits and so the current implementation doesn't provide a way to also set PTE bits. The new _PAGE_NUMA bit, when set, is actually restricting access so it must use that function too, so this change adds the ability for pte_update() to also set bits. We will use this later to set the _PAGE_NUMA bit. Acked-by: Mel Gorman <mgorman@suse.de> Acked-by: Rik van Riel <riel@redhat.com> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'mm/mprotect.c')
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