linux-kernel - [PATCH] x86_64: reserve crashkernel bootmem before reserve dma32 bootmem

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Message-Id: <200807141016.40572.yhlu.kernel@gmail.com>
Date:	Mon, 14 Jul 2008 10:16:40 -0700
From:	Yinghai Lu <yhlu.kernel@...il.com>
To:	Greg KH <greg@...ah.com>, stable@...nel.org,
	Joe Jin <joe.jin@...cle.com>
Cc:	Ingo Molnar <mingo@...e.hu>, "Greg Kroah-Hartman" <gregkh@...e.de>,
	greg.marsden@...cle.com, linux-kernel@...r.kernel.org,
	Andi Kleen <andi@...stfloor.org>,
	"H. Peter Anvin" <hpa@...or.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>, tao.ma@...cle.com
Subject: [PATCH] x86_64: reserve crashkernel bootmem before reserve dma32 bootmem

From: Joe Jin <joe.jin@...cle.com>

Before reserve_crashkernel, dma32_reserve_bootmem would reserve 128M memory.
this cuased crashkernel end address must less than 64M or start address must
more than 192M except crashkernel memory reserved before dma32 memory reserved.

Signed-off-by: Joe Jin <joe.jin@...cle.com>
Acked-by: Yinghai Lu <yhlu.kernel@...il.com>
Acked-by: Ingo Molnar <mingo@...e.hu>


---
 arch/x86/kernel/setup_64.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Index: linux-2.6/arch/x86/kernel/setup_64.c
===================================================================
--- linux-2.6.orig/arch/x86/kernel/setup_64.c
+++ linux-2.6/arch/x86/kernel/setup_64.c
@@ -444,8 +444,6 @@ void __init setup_arch(char **cmdline_p)
 	contig_initmem_init(0, end_pfn);
 #endif
 
-	dma32_reserve_bootmem();
-
 #ifdef CONFIG_ACPI_SLEEP
 	/*
 	 * Reserve low memory region for sleep support.
@@ -486,6 +484,8 @@ void __init setup_arch(char **cmdline_p)
 #endif
 	reserve_crashkernel();
 
+	dma32_reserve_bootmem();
+
 	reserve_ibft_region();
 
 	paging_init();
--
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