[PATCH] unify pfn_to_page: x86_64 pfn_to_page

x86_64 can use generic funcs.
For DISCONTIGMEM, CONFIG_OUT_OF_LINE_PFN_TO_PAGE is selected.

Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Andi Kleen <ak@muc.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/arch/x86_64/Kconfig b/arch/x86_64/Kconfig
index 1cb4aa241c8c..4310b4a311a5 100644
--- a/arch/x86_64/Kconfig
+++ b/arch/x86_64/Kconfig
@@ -334,6 +334,10 @@ config HAVE_ARCH_EARLY_PFN_TO_NID
         def_bool y
         depends on NUMA
 
+config OUT_OF_LINE_PFN_TO_PAGE
+        def_bool y
+        depends on DISCONTIGMEM
+
 config NR_CPUS
         int "Maximum number of CPUs (2-256)"
         range 2 255