[PATCH] Have ia64 use add_active_range() and free_area_init_nodes

Size zones and holes in an architecture independent manner for ia64.

[bob.picco@hp.com: fix ia64 FLATMEM+VIRTUAL_MEM_MAP]
Signed-off-by: Mel Gorman <mel@csn.ul.ie>
Signed-off-by: Bob Picco <bob.picco@hp.com>
Cc: Dave Hansen <haveblue@us.ibm.com>
Cc: Andy Whitcroft <apw@shadowen.org>
Cc: Andi Kleen <ak@muc.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: "Keith Mannthey" <kmannth@gmail.com>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Yasunori Goto <y-goto@jp.fujitsu.com>
Signed-off-by: Bob Picco <bob.picco@hp.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

4 files changed, 39 insertions, 87 deletions

diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index f521f2f60a78..d5ee4fc8fe66 100644
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -356,6 +356,9 @@ config NODES_SHIFT
           MAX_NUMNODES will be 2^(This value).
           If in doubt, use the default.
 
+config ARCH_POPULATES_NODE_MAP
+        def_bool y
+
 # VIRTUAL_MEM_MAP and FLAT_NODE_MEM_MAP are functionally equivalent.
 # VIRTUAL_MEM_MAP has been retained for historical reasons.
 config VIRTUAL_MEM_MAP
diff --git a/arch/ia64/mm/contig.c b/arch/ia64/mm/contig.c
index e004143ba86b..719d476e71ba 100644
--- a/arch/ia64/mm/contig.c
+++ b/arch/ia64/mm/contig.c
@@ -26,7 +26,6 @@
 #include <asm/mca.h>
 
 #ifdef CONFIG_VIRTUAL_MEM_MAP
-static unsigned long num_dma_physpages;
 static unsigned long max_gap;
 #endif
 
@@ -218,18 +217,6 @@ count_pages (u64 start, u64 end, void *arg)
         return 0;
 }
 
-#ifdef CONFIG_VIRTUAL_MEM_MAP
-static int
-count_dma_pages (u64 start, u64 end, void *arg)
-{
-        unsigned long *count = arg;
-
-        if (start < MAX_DMA_ADDRESS)
-                *count += (min(end, MAX_DMA_ADDRESS) - start) >> PAGE_SHIFT;
-        return 0;
-}
-#endif
-
 /*
  * Set up the page tables.
  */
@@ -238,45 +225,22 @@ void __init
 paging_init (void)
 {
         unsigned long max_dma;
-        unsigned long zones_size[MAX_NR_ZONES];
-#ifdef CONFIG_VIRTUAL_MEM_MAP
-        unsigned long zholes_size[MAX_NR_ZONES];
-#endif
-
-        /* initialize mem_map[] */
-
-        memset(zones_size, 0, sizeof(zones_size));
+        unsigned long nid = 0;
+        unsigned long max_zone_pfns[MAX_NR_ZONES];
 
         num_physpages = 0;
         efi_memmap_walk(count_pages, &num_physpages);
 
         max_dma = virt_to_phys((void *) MAX_DMA_ADDRESS) >> PAGE_SHIFT;
+        max_zone_pfns[ZONE_DMA] = max_dma;
+        max_zone_pfns[ZONE_NORMAL] = max_low_pfn;
 
 #ifdef CONFIG_VIRTUAL_MEM_MAP
-        memset(zholes_size, 0, sizeof(zholes_size));
-
-        num_dma_physpages = 0;
-        efi_memmap_walk(count_dma_pages, &num_dma_physpages);
-
-        if (max_low_pfn < max_dma) {
-                zones_size[ZONE_DMA] = max_low_pfn;
-                zholes_size[ZONE_DMA] = max_low_pfn - num_dma_physpages;
-        } else {
-                zones_size[ZONE_DMA] = max_dma;
-                zholes_size[ZONE_DMA] = max_dma - num_dma_physpages;
-                if (num_physpages > num_dma_physpages) {
-                        zones_size[ZONE_NORMAL] = max_low_pfn - max_dma;
-                        zholes_size[ZONE_NORMAL] =
-                                ((max_low_pfn - max_dma) -
-                                 (num_physpages - num_dma_physpages));
-                }
-        }
-
+        efi_memmap_walk(register_active_ranges, &nid);
         efi_memmap_walk(find_largest_hole, (u64 *)&max_gap);
         if (max_gap < LARGE_GAP) {
                 vmem_map = (struct page *) 0;
-                free_area_init_node(0, NODE_DATA(0), zones_size, 0,
-                                    zholes_size);
+                free_area_init_nodes(max_zone_pfns);
         } else {
                 unsigned long map_size;
 
@@ -288,20 +252,19 @@ paging_init (void)
                 vmem_map = (struct page *) vmalloc_end;
                 efi_memmap_walk(create_mem_map_page_table, NULL);
 
-                NODE_DATA(0)->node_mem_map = vmem_map;
-                free_area_init_node(0, NODE_DATA(0), zones_size,
-                                    0, zholes_size);
+                /*
+                 * alloc_node_mem_map makes an adjustment for mem_map
+                 * which isn't compatible with vmem_map.
+                 */
+                NODE_DATA(0)->node_mem_map = vmem_map +
+                        find_min_pfn_with_active_regions();
+                free_area_init_nodes(max_zone_pfns);
 
                 printk("Virtual mem_map starts at 0x%p\n", mem_map);
         }
 #else /* !CONFIG_VIRTUAL_MEM_MAP */
-        if (max_low_pfn < max_dma)
-                zones_size[ZONE_DMA] = max_low_pfn;
-        else {
-                zones_size[ZONE_DMA] = max_dma;
-                zones_size[ZONE_NORMAL] = max_low_pfn - max_dma;
-        }
-        free_area_init(zones_size);
+        add_active_range(0, 0, max_low_pfn);
+        free_area_init_nodes(max_zone_pfns);
 #endif /* !CONFIG_VIRTUAL_MEM_MAP */
         zero_page_memmap_ptr = virt_to_page(ia64_imva(empty_zero_page));
 }
diff --git a/arch/ia64/mm/discontig.c b/arch/ia64/mm/discontig.c
index d260bffa01ab..7bd28079dcc4 100644
--- a/arch/ia64/mm/discontig.c
+++ b/arch/ia64/mm/discontig.c
@@ -654,6 +654,7 @@ static __init int count_node_pages(unsigned long start, unsigned long len, int n
 {
         unsigned long end = start + len;
 
+        add_active_range(node, start >> PAGE_SHIFT, end >> PAGE_SHIFT);
         mem_data[node].num_physpages += len >> PAGE_SHIFT;
         if (start <= __pa(MAX_DMA_ADDRESS))
                 mem_data[node].num_dma_physpages +=
@@ -678,10 +679,10 @@ static __init int count_node_pages(unsigned long start, unsigned long len, int n
 void __init paging_init(void)
 {
         unsigned long max_dma;
-        unsigned long zones_size[MAX_NR_ZONES];
-        unsigned long zholes_size[MAX_NR_ZONES];
         unsigned long pfn_offset = 0;
+        unsigned long max_pfn = 0;
         int node;
+        unsigned long max_zone_pfns[MAX_NR_ZONES];
 
         max_dma = virt_to_phys((void *) MAX_DMA_ADDRESS) >> PAGE_SHIFT;
 
@@ -698,47 +699,20 @@ void __init paging_init(void)
 #endif
 
         for_each_online_node(node) {
-                memset(zones_size, 0, sizeof(zones_size));
-                memset(zholes_size, 0, sizeof(zholes_size));
-
                 num_physpages += mem_data[node].num_physpages;
-
-                if (mem_data[node].min_pfn >= max_dma) {
-                        /* All of this node's memory is above ZONE_DMA */
-                        zones_size[ZONE_NORMAL] = mem_data[node].max_pfn -
-                                mem_data[node].min_pfn;
-                        zholes_size[ZONE_NORMAL] = mem_data[node].max_pfn -
-                                mem_data[node].min_pfn -
-                                mem_data[node].num_physpages;
-                } else if (mem_data[node].max_pfn < max_dma) {
-                        /* All of this node's memory is in ZONE_DMA */
-                        zones_size[ZONE_DMA] = mem_data[node].max_pfn -
-                                mem_data[node].min_pfn;
-                        zholes_size[ZONE_DMA] = mem_data[node].max_pfn -
-                                mem_data[node].min_pfn -
-                                mem_data[node].num_dma_physpages;
-                } else {
-                        /* This node has memory in both zones */
-                        zones_size[ZONE_DMA] = max_dma -
-                                mem_data[node].min_pfn;
-                        zholes_size[ZONE_DMA] = zones_size[ZONE_DMA] -
-                                mem_data[node].num_dma_physpages;
-                        zones_size[ZONE_NORMAL] = mem_data[node].max_pfn -
-                                max_dma;
-                        zholes_size[ZONE_NORMAL] = zones_size[ZONE_NORMAL] -
-                                (mem_data[node].num_physpages -
-                                 mem_data[node].num_dma_physpages);
-                }
-
                 pfn_offset = mem_data[node].min_pfn;
 
 #ifdef CONFIG_VIRTUAL_MEM_MAP
                 NODE_DATA(node)->node_mem_map = vmem_map + pfn_offset;
 #endif
-                free_area_init_node(node, NODE_DATA(node), zones_size,
-                                    pfn_offset, zholes_size);
+                if (mem_data[node].max_pfn > max_pfn)
+                        max_pfn = mem_data[node].max_pfn;
         }
 
+        max_zone_pfns[ZONE_DMA] = max_dma;
+        max_zone_pfns[ZONE_NORMAL] = max_pfn;
+        free_area_init_nodes(max_zone_pfns);
+
         zero_page_memmap_ptr = virt_to_page(ia64_imva(empty_zero_page));
 }
 
diff --git a/arch/ia64/mm/init.c b/arch/ia64/mm/init.c
index 30617ccb4f7e..ff87a5cba399 100644
--- a/arch/ia64/mm/init.c
+++ b/arch/ia64/mm/init.c
@@ -593,6 +593,18 @@ find_largest_hole (u64 start, u64 end, void *arg)
         last_end = end;
         return 0;
 }
+
+int __init
+register_active_ranges(u64 start, u64 end, void *nid)
+{
+        BUG_ON(nid == NULL);
+        BUG_ON(*(unsigned long *)nid >= MAX_NUMNODES);
+
+        add_active_range(*(unsigned long *)nid,
+                                __pa(start) >> PAGE_SHIFT,
+                                __pa(end) >> PAGE_SHIFT);
+        return 0;
+}
 #endif /* CONFIG_VIRTUAL_MEM_MAP */
 
 static int __init