mm, page_alloc: fix a division by zero error when boosting watermarks v2

[linux-2.6-block.git] / mm / memblock.c

diff --git a/mm/memblock.c b/mm/memblock.c
index 022d4cbb3618bb3886cec62e69912b4e9a5e8067..ea31045ba70423d128575ab7e9e182a40bea425f 100644 (file)
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -26,6 +26,13 @@
 
 #include "internal.h"
 
+#define INIT_MEMBLOCK_REGIONS                  128
+#define INIT_PHYSMEM_REGIONS                   4
+
+#ifndef INIT_MEMBLOCK_RESERVED_REGIONS
+# define INIT_MEMBLOCK_RESERVED_REGIONS                INIT_MEMBLOCK_REGIONS
+#endif
+
 /**
  * DOC: memblock overview
  *
@@ -92,7 +99,7 @@ unsigned long max_pfn;
 unsigned long long max_possible_pfn;
 
 static struct memblock_region memblock_memory_init_regions[INIT_MEMBLOCK_REGIONS] __initdata_memblock;
-static struct memblock_region memblock_reserved_init_regions[INIT_MEMBLOCK_REGIONS] __initdata_memblock;
+static struct memblock_region memblock_reserved_init_regions[INIT_MEMBLOCK_RESERVED_REGIONS] __initdata_memblock;
 #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP
 static struct memblock_region memblock_physmem_init_regions[INIT_PHYSMEM_REGIONS] __initdata_memblock;
 #endif
@@ -105,7 +112,7 @@ struct memblock memblock __initdata_memblock = {
 
        .reserved.regions       = memblock_reserved_init_regions,
        .reserved.cnt           = 1,    /* empty dummy entry */
-       .reserved.max           = INIT_MEMBLOCK_REGIONS,
+       .reserved.max           = INIT_MEMBLOCK_RESERVED_REGIONS,
        .reserved.name          = "reserved",
 
 #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP