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[PATCH] x86_64: allcate e820 resource struct all together

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From: Yinghai Lu <yhlu.kernel.send@...>
To: Andrew Morton <akpm@...>, Ingo Molnar <mingo@...>
Cc: kernel list <linux-kernel@...>
Subject: [PATCH] x86_64: allcate e820 resource struct all together
Date: Friday, March 21, 2008 - 2:57 am

don't need to allocate that one by one

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>

Index: linux-2.6/arch/x86/kernel/e820_64.c
===================================================================
--- linux-2.6.orig/arch/x86/kernel/e820_64.c
+++ linux-2.6/arch/x86/kernel/e820_64.c
@@ -237,9 +237,9 @@ unsigned long __init e820_end_of_ram(voi
 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;
@@ -250,6 +250,7 @@ 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++;
 	}
 }
 
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Messages in current thread:
[PATCH] x86_64: allcate e820 resource struct all together, Yinghai Lu, (Fri Mar 21, 2:57 am)
Re: [PATCH] x86_64: allcate e820 resource struct all together, Ingo Molnar, (Fri Mar 21, 8:04 am)