[PATCH] optional ZONE_DMA: optional ZONE_DMA for ia64

[sfrench/cifs-2.6.git] / arch / ia64 / mm / discontig.c

diff --git a/arch/ia64/mm/discontig.c b/arch/ia64/mm/discontig.c
index d497b6b0f5b2c08d4be5cd50478399db993a2dc8..16835108bb5bc71a3e19cdcc1f582473ce89899c 100644 (file)
--- a/arch/ia64/mm/discontig.c
+++ b/arch/ia64/mm/discontig.c
@@ -37,7 +37,9 @@ struct early_node_data {
        unsigned long pernode_size;
        struct bootmem_data bootmem_data;
        unsigned long num_physpages;
+#ifdef CONFIG_ZONE_DMA
        unsigned long num_dma_physpages;
+#endif
        unsigned long min_pfn;
        unsigned long max_pfn;
 };
@@ -412,37 +414,6 @@ static void __init memory_less_nodes(void)
        return;
 }
 
-#ifdef CONFIG_SPARSEMEM
-/**
- * register_sparse_mem - notify SPARSEMEM that this memory range exists.
- * @start: physical start of range
- * @end: physical end of range
- * @arg: unused
- *
- * Simply calls SPARSEMEM to register memory section(s).
- */
-static int __init register_sparse_mem(unsigned long start, unsigned long end,
-       void *arg)
-{
-       int nid;
-
-       start = __pa(start) >> PAGE_SHIFT;
-       end = __pa(end) >> PAGE_SHIFT;
-       nid = early_pfn_to_nid(start);
-       memory_present(nid, start, end);
-
-       return 0;
-}
-
-static void __init arch_sparse_init(void)
-{
-       efi_memmap_walk(register_sparse_mem, NULL);
-       sparse_init();
-}
-#else
-#define arch_sparse_init() do {} while (0)
-#endif
-
 /**
  * find_memory - walk the EFI memory map and setup the bootmem allocator
  *
@@ -473,6 +444,9 @@ void __init find_memory(void)
                        node_clear(node, memory_less_mask);
                        mem_data[node].min_pfn = ~0UL;
                }
+
+       efi_memmap_walk(register_active_ranges, NULL);
+
        /*
         * Initialize the boot memory maps in reverse order since that's
         * what the bootmem allocator expects
@@ -506,6 +480,12 @@ void __init find_memory(void)
        max_pfn = max_low_pfn;
 
        find_initrd();
+
+#ifdef CONFIG_CRASH_DUMP
+       /* If we are doing a crash dump, we still need to know the real mem
+        * size before original memory map is reset. */
+        saved_max_pfn = max_pfn;
+#endif
 }
 
 #ifdef CONFIG_SMP
@@ -654,11 +634,12 @@ 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;
+#ifdef CONFIG_ZONE_DMA
        if (start <= __pa(MAX_DMA_ADDRESS))
                mem_data[node].num_dma_physpages +=
                        (min(end, __pa(MAX_DMA_ADDRESS)) - start) >>PAGE_SHIFT;
+#endif
        start = GRANULEROUNDDOWN(start);
        start = ORDERROUNDDOWN(start);
        end = GRANULEROUNDUP(end);
@@ -686,10 +667,11 @@ void __init paging_init(void)
 
        max_dma = virt_to_phys((void *) MAX_DMA_ADDRESS) >> PAGE_SHIFT;
 
-       arch_sparse_init();
-
        efi_memmap_walk(filter_rsvd_memory, count_node_pages);
 
+       sparse_memory_present_with_active_regions(MAX_NUMNODES);
+       sparse_init();
+
 #ifdef CONFIG_VIRTUAL_MEM_MAP
        vmalloc_end -= PAGE_ALIGN(ALIGN(max_low_pfn, MAX_ORDER_NR_PAGES) *
                sizeof(struct page));
@@ -709,7 +691,10 @@ void __init paging_init(void)
                        max_pfn = mem_data[node].max_pfn;
        }
 
+       memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
+#ifdef CONFIG_ZONE_DMA
        max_zone_pfns[ZONE_DMA] = max_dma;
+#endif
        max_zone_pfns[ZONE_NORMAL] = max_pfn;
        free_area_init_nodes(max_zone_pfns);