linux-kernel - [PATCH 02/12] mm: fix boundary checking in free_bootmem

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Message-Id: <200803191403.34107.yhlu.kernel@gmail.com>
Date:	Wed, 19 Mar 2008 14:03:33 -0700
From:	Yinghai Lu <yhlu.kernel.send@...il.com>
To:	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>
Cc:	Christoph Lameter <clameter@....com>,
	kernel list <linux-kernel@...r.kernel.org>
Subject: [PATCH 02/12] mm: fix boundary checking in free_bootmem_core fix

[PATCH] mm: fix boundary checking in free_bootmem_core fix

	[PATCH] mm: fix boundary checking in free_bootmem_core

make the free_bootmem_core could handle out of range case. we could use
bdata_list to make sure the range can be freed for sure.

so next time, we don't need to loop online nodes and could use
free_bootmem directly.

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

Index: linux-2.6/mm/bootmem.c
===================================================================
--- linux-2.6.orig/mm/bootmem.c
+++ linux-2.6/mm/bootmem.c
@@ -432,7 +432,9 @@ int __init reserve_bootmem(unsigned long
 
 void __init free_bootmem(unsigned long addr, unsigned long size)
 {
-	free_bootmem_core(NODE_DATA(0)->bdata, addr, size);
+	bootmem_data_t *bdata;
+	list_for_each_entry(bdata, &bdata_list, list)
+		free_bootmem_core(bdata, addr, size);
 }
 
 unsigned long __init free_all_bootmem(void)
--
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