[PATCH] ia64: fix build errors by exporting paddr_to_nid()

[Randy Dunlap]

From: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>

Fix build errors on ia64 when DISCONTIGMEM=y and NUMA=y by
exporting paddr_to_nid().

Fixes these build errors:

ERROR: "paddr_to_nid" [sound/core/snd-pcm.ko] undefined!
ERROR: "paddr_to_nid" [net/sunrpc/sunrpc.ko] undefined!
ERROR: "paddr_to_nid" [fs/cifs/cifs.ko] undefined!
ERROR: "paddr_to_nid" [drivers/video/fbdev/core/fb.ko] undefined!
ERROR: "paddr_to_nid" [drivers/usb/mon/usbmon.ko] undefined!
ERROR: "paddr_to_nid" [drivers/usb/core/usbcore.ko] undefined!
ERROR: "paddr_to_nid" [drivers/md/raid1.ko] undefined!
ERROR: "paddr_to_nid" [drivers/md/dm-mod.ko] undefined!
ERROR: "paddr_to_nid" [drivers/md/dm-crypt.ko] undefined!
ERROR: "paddr_to_nid" [drivers/md/dm-bufio.ko] undefined!
ERROR: "paddr_to_nid" [drivers/ide/ide-core.ko] undefined!
ERROR: "paddr_to_nid" [drivers/ide/ide-cd_mod.ko] undefined!
ERROR: "paddr_to_nid" [drivers/gpu/drm/drm.ko] undefined!
ERROR: "paddr_to_nid" [drivers/char/agp/agpgart.ko] undefined!
ERROR: "paddr_to_nid" [drivers/block/nbd.ko] undefined!
ERROR: "paddr_to_nid" [drivers/block/loop.ko] undefined!
ERROR: "paddr_to_nid" [drivers/block/brd.ko] undefined!
ERROR: "paddr_to_nid" [crypto/ccm.ko] undefined!

Reported-by: kbuild test robot <lkp@xxxxxxxxx>
Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Cc: Tony Luck <tony.luck@xxxxxxxxx>
Cc: Fenghua Yu <fenghua.yu@xxxxxxxxx>
Cc: linux-ia64@xxxxxxxxxxxxxxx
---
 arch/ia64/mm/numa.c |    1 +
 1 file changed, 1 insertion(+)

--- lnx-51-rc7.orig/arch/ia64/mm/numa.c
+++ lnx-51-rc7/arch/ia64/mm/numa.c
@@ -55,6 +55,7 @@ paddr_to_nid(unsigned long paddr)
 
 	return (i < num_node_memblks) ? node_memblk[i].nid : (num_node_memblks ? -1 : 0);
 }
+EXPORT_SYMBOL(paddr_to_nid);
 
 #if defined(CONFIG_SPARSEMEM) && defined(CONFIG_NUMA)
 /*