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powerpc/mm: Convert virtual address to vpn
authorAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Mon, 10 Sep 2012 02:52:50 +0000 (02:52 +0000)
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>
Mon, 17 Sep 2012 06:31:49 +0000 (16:31 +1000)
This patch convert different functions to take virtual page number
instead of virtual address. Virtual page number is virtual address
shifted right by VPN_SHIFT (12) bits. This enable us to have an
address range of upto 76 bits.

Reviewed-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

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