From: Mel Gorman <mgorman@suse.de>
Subject: x86: mm: enable deferred struct page initialisation on x86-64

Subject says it all.  Other architectures may enable on a case-by-case
basis after auditing early_pfn_to_nid and testing.

Signed-off-by: Mel Gorman <mgorman@suse.de>
Tested-by: Nate Zimmer <nzimmer@sgi.com>
Tested-by: Waiman Long <waiman.long@hp.com>
Tested-by: Daniel J Blueman <daniel@numascale.com>
Acked-by: Pekka Enberg <penberg@kernel.org>
Cc: Robin Holt <robinmholt@gmail.com>
Cc: Nate Zimmer <nzimmer@sgi.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Waiman Long <waiman.long@hp.com>
Cc: Scott Norton <scott.norton@hp.com>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 arch/x86/Kconfig |    1 +
 1 file changed, 1 insertion(+)

diff -puN arch/x86/Kconfig~x86-mm-enable-deferred-struct-page-initialisation-on-x86-64 arch/x86/Kconfig
--- a/arch/x86/Kconfig~x86-mm-enable-deferred-struct-page-initialisation-on-x86-64
+++ a/arch/x86/Kconfig
@@ -18,6 +18,7 @@ config X86_64
 	select X86_DEV_DMA_OPS
 	select ARCH_USE_CMPXCHG_LOCKREF
 	select HAVE_LIVEPATCH
+	select ARCH_SUPPORTS_DEFERRED_STRUCT_PAGE_INIT
 
 ### Arch settings
 config X86
_