linux-kernel - [PATCH] x86: extend e820 ealy_res support 32bit

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Date:	Sun, 25 May 2008 10:00:09 -0700
From:	Yinghai Lu <yhlu.kernel@...il.com>
To:	Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jeremy Fitzhardinge <jeremy@...p.org>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: [PATCH] x86: extend e820 ealy_res support 32bit - fix #2


remove extra -1 in reseve_early calling
    panic if can not find space for new RAMDISK

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

Index: linux-2.6/arch/x86/kernel/setup_32.c
diff --git a/arch/x86/kernel/setup_32.c b/arch/x86/kernel/setup_32.c
index 361e5c9..eed7121 100644
--- a/arch/x86/kernel/setup_32.c
+++ b/arch/x86/kernel/setup_32.c
@@ -479,7 +479,7 @@ static void __init reserve_initrd(void)
 	initrd_start = 0;
 
 	if (ramdisk_size >= end_of_lowmem/2) {
-		free_early(ramdisk_image, ramdisk_image + ramdisk_size - 1);
+		free_early(ramdisk_image, ramdisk_end);
 		printk(KERN_ERR "initrd too large to handle, "
 		       "disabling initrd\n");
 		return;
@@ -501,9 +501,13 @@ static void __init reserve_initrd(void)
 				 end_of_lowmem, ramdisk_size,
 				 PAGE_SIZE);
 
+	if (ramdisk_here == -1ULL)
+		panic("Cannot find place for new RAMDISK of size %lld\n",
+			 ramdisk_size);
+
 	/* Note: this includes all the lowmem currently occupied by
 	   the initrd, we rely on that fact to keep the data intact. */
-	reserve_early(ramdisk_here, ramdisk_here + ramdisk_size - 1,
+	reserve_early(ramdisk_here, ramdisk_here + ramdisk_size,
 			 "NEW RAMDISK");
 	initrd_start = ramdisk_here + PAGE_OFFSET;
 	initrd_end   = initrd_start + ramdisk_size;
@@ -579,15 +583,15 @@ void __init setup_bootmem_allocator(void)
 				 PAGE_SIZE);
 	if (bootmap == -1L)
 		panic("Cannot find bootmem map of size %ld\n", bootmap_size);
-	reserve_early(bootmap, bootmap + bootmap_size - 1, "BOOTMAP");
+	reserve_early(bootmap, bootmap + bootmap_size, "BOOTMAP");
 #ifdef CONFIG_BLK_DEV_INITRD
 	reserve_initrd();
 #endif
 	bootmap_size = init_bootmem(bootmap >> PAGE_SHIFT, max_low_pfn);
 	printk(KERN_INFO "  low ram: %08lx - %08lx\n",
 		 min_low_pfn<<PAGE_SHIFT, max_low_pfn<<PAGE_SHIFT);
-	printk(KERN_INFO "  bootmap [%08lx -  %08lx]\n",
-		 bootmap, bootmap + bootmap_size - 1);
+	printk(KERN_INFO "  bootmap %08lx - %08lx\n",
+		 bootmap, bootmap + bootmap_size);
 	register_bootmem_low_pages(max_low_pfn);
 	early_res_to_bootmem(0, max_low_pfn<<PAGE_SHIFT);
 
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