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@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 9 insertions, 5 deletions

diff --git a/arch/x86/kernel/setup_32.c b/arch/x86/kernel/setup_32.c
index c04e8c91daf7..08b47a2f7af0 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);