[PATCH] mm: remove arch independent NODES_SPAN_OTHER_NODES

The NODES_SPAN_OTHER_NODES config option was created so that DISCONTIGMEM
could handle pSeries numa layouts.  However, support for DISCONTIGMEM has
been replaced by SPARSEMEM on powerpc.  As a result, this config option and
supporting code is no longer needed.

I have already sent a patch to Paul that removes the option from powerpc
specific code.  This removes the arch independent piece.  Doesn't really
matter which is applied first.

Signed-off-by: Mike Kravetz <kravetz@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 28f8496..d294b57 100644 (file)
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -603,12 +603,6 @@ void sparse_init(void);
 #define sparse_index_init(_sec, _nid)  do {} while (0)
 #endif /* CONFIG_SPARSEMEM */
 
-#ifdef CONFIG_NODES_SPAN_OTHER_NODES
-#define early_pfn_in_nid(pfn, nid)     (early_pfn_to_nid(pfn) == (nid))
-#else
-#define early_pfn_in_nid(pfn, nid)     (1)
-#endif
-
 #ifndef early_pfn_valid
 #define early_pfn_valid(pfn)   (1)
 #endif

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 1e49dc7..07825c6 100644 (file)
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1708,8 +1708,6 @@ void __devinit memmap_init_zone(unsigned long size, int nid, unsigned long zone,
        for (pfn = start_pfn; pfn < end_pfn; pfn++, page++) {
                if (!early_pfn_valid(pfn))
                        continue;
-               if (!early_pfn_in_nid(pfn, nid))
-                       continue;
                page = pfn_to_page(pfn);
                set_page_links(page, zone, nid, pfn);
                set_page_count(page, 1);