From 6b6fabce5ac47668a2c2d9a14f1cdcc23c4ed896 Mon Sep 17 00:00:00 2001
From: Hirokazu Takata <takata@linux-m32r.org>
Date: Wed, 23 Sep 2009 21:37:06 +0900
Subject: [PATCH] m32r: Fix set_memory() for DISCONTIGMEM
In case CONFIG_DISCONTIGMEM is set, the memory size of system was
always determined by CONFIG_MEMORY_SIZE and was not changeable.
This patch fixes set_memory() of arch/m32r/mm/discontig.c so that
we can specify memory size by the "mem=<size>" kernel parameter.
Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>
---
arch/m32r/mm/discontig.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/arch/m32r/mm/discontig.c b/arch/m32r/mm/discontig.c
index b7a78ad429b78f..5d2858f6eede42 100644
--- a/arch/m32r/mm/discontig.c
+++ b/arch/m32r/mm/discontig.c
@@ -32,6 +32,9 @@ typedef struct {
} mem_prof_t;
static mem_prof_t mem_prof[MAX_NUMNODES];
+extern unsigned long memory_start;
+extern unsigned long memory_end;
+
static void __init mem_prof_init(void)
{
unsigned long start_pfn, holes, free_pfn;
@@ -42,7 +45,7 @@ static void __init mem_prof_init(void)
/* Node#0 SDRAM */
mp = &mem_prof[0];
mp->start_pfn = PFN_UP(CONFIG_MEMORY_START);
- mp->pages = PFN_DOWN(CONFIG_MEMORY_SIZE);
+ mp->pages = PFN_DOWN(memory_end - memory_start);
mp->holes = 0;
mp->free_pfn = PFN_UP(__pa(_end));
--
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