linux-kernel - [RFC PATCH 2/6] ARM, crashkernel: use ___alloc_bootmem_node

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Date:	Mon, 25 Mar 2013 13:11:10 +0900
From:	Joonsoo Kim <iamjoonsoo.kim@....com>
To:	Russell King <linux@....linux.org.uk>
Cc:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Nicolas Pitre <nico@...aro.org>,
	Will Deacon <will.deacon@....com>,
	Joonsoo Kim <iamjoonsoo.kim@....com>
Subject: [RFC PATCH 2/6] ARM, crashkernel: use ___alloc_bootmem_node_nopanic() for reserving memory

For crashkernel, specific address should be reserved.
It can be achived by reserve_bootmem(), but this function is
only for bootmem.

Now, we try to enable nobootmem, therfore change it more general function,
___alloc_bootmem_node_nopanic(). It can be use for both,
bootmem and nobootmem.

Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@....com>

diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index b3990a3..99ffe87 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -674,15 +674,20 @@ static void __init reserve_crashkernel(void)
 {
 	unsigned long long crash_size, crash_base;
 	unsigned long long total_mem;
+	unsigned long limit = 0;
 	int ret;
 
 	total_mem = get_total_mem();
 	ret = parse_crashkernel(boot_command_line, total_mem,
 				&crash_size, &crash_base);
-	if (ret)
+	if (ret != 0 || crash_size == 0)
 		return;
 
-	ret = reserve_bootmem(crash_base, crash_size, BOOTMEM_EXCLUSIVE);
+	if (crash_base != 0)
+		limit = crash_base + crash_size;
+
+	ret = ___alloc_bootmem_node_nopanic(NODE_DATA(0), crash_size,
+						PAGE_ALIGN, crash_base, limit);
 	if (ret < 0) {
 		printk(KERN_WARNING "crashkernel reservation failed - "
 		       "memory is in use (0x%lx)\n", (unsigned long)crash_base);
-- 
1.7.9.5

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