From: Nick Piggin <npiggin@suse.de>
Date: Mon, 28 Jul 2008 03:28:03 +0000 (-0700)
Subject: powerpc/mm: Implement _PAGE_SPECIAL & pte_special() for 64-bit
X-Git-Tag: v2.6.27-rc1~27^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=83ac6a1ed40bfbe185cf2bac5505d8d97aad8b1d;p=pandora-kernel.git

powerpc/mm: Implement _PAGE_SPECIAL & pte_special() for 64-bit

Implement _PAGE_SPECIAL and pte_special() for 64-bit powerpc. This bit will
be used by the fast get_user_pages() to differenciate PTEs that correspond
to a valid struct page from special mappings that don't such as IO mappings
obtained via io_remap_pfn_ranges().

Signed-off-by: Nick Piggin <npiggin@suse.de>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Hugh Dickins <hugh@veritas.com>
Cc: "Paul E. McKenney" <paulmck@us.ibm.com>
Reviewed-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---

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