commit 01561264bd1ea1d654d09babe02d784a5b150124
Author: Yinghai Lu <yhlu.kernel.send@gmail.com>
Date:   Thu Mar 20 23:57:21 2008 -0700

    x86: allocate e820 resource struct all together
    
    don't need to allocate that one by one
    
    Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
    Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/arch/x86/kernel/e820_64.c b/arch/x86/kernel/e820_64.c
index 4509757..9184e64 100644
--- a/arch/x86/kernel/e820_64.c
+++ b/arch/x86/kernel/e820_64.c
@@ -300,9 +300,10 @@ unsigned long __init e820_end_of_ram(void)
 void __init e820_reserve_resources(void)
 {
 	int i;
+	struct resource *res;
+
+	res = alloc_bootmem_low(sizeof(struct resource) * e820.nr_map);
 	for (i = 0; i < e820.nr_map; i++) {
-		struct resource *res;
-		res = alloc_bootmem_low(sizeof(struct resource));
 		switch (e820.map[i].type) {
 		case E820_RAM:	res->name = "System RAM"; break;
 		case E820_ACPI:	res->name = "ACPI Tables"; break;
@@ -313,6 +314,7 @@ void __init e820_reserve_resources(void)
 		res->end = res->start + e820.map[i].size - 1;
 		res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
 		insert_resource(&iomem_resource, res);
+		res++;
 	}
 }