From cf6fdf406781aaca0f09fc838fe9c8ce1cfcecd5 Mon Sep 17 00:00:00 2001
From: Stefan Lankes <lankes@lfbs.rwth-aachen.de>
Date: Wed, 22 Jun 2011 08:38:49 +0200
Subject: [PATCH] reducing the size of the kernel image by using unintialized
 global arrays

---
 mm/memory.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/mm/memory.c b/mm/memory.c
index c6241d52..ad29aedd 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -39,7 +39,7 @@
  * 
  * Set whole address space as occupied
  */
-static uint8_t	 	bitmap[BITMAP_SIZE] = {[0 ... BITMAP_SIZE-1] = 0xFF};
+static uint8_t	 	bitmap[BITMAP_SIZE]; // = {[0 ... BITMAP_SIZE-1] = 0xFF};
 static spinlock_t	bitmap_lock = SPINLOCK_INIT;
 static size_t		alloc_start;
 atomic_int32_t		total_pages = ATOMIC_INIT(0);
@@ -94,6 +94,9 @@ int mmu_init(void)
 	unsigned int i; 
 	size_t addr;
 
+	// at first, set default value of the bitmap
+	memset(bitmap, 0xFF, sizeof(uint8_t)*BITMAP_SIZE);
+
 #ifdef CONFIG_MULTIBOOT
 	if (mb_info && (mb_info->flags & MULTIBOOT_INFO_MEM_MAP)) {
 		size_t end_addr;