x86, mm: relocate initrd under all mem for 64bit

instead of under 4g.

For 64bit, we can use any mapped mem instead of low mem.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Link: http://lkml.kernel.org/r/1353123563-3103-17-git-send-email-yinghai@kernel.org
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

1 files changed, 3 insertions, 4 deletions

diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 68dffeceb193..94f922a73c54 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -324,7 +324,7 @@ static void __init relocate_initrd(void)
         char *p, *q;
 
         /* We need to move the initrd down into directly mapped mem */
-        ramdisk_here = memblock_find_in_range(0, PFN_PHYS(max_low_pfn_mapped),
+        ramdisk_here = memblock_find_in_range(0, PFN_PHYS(max_pfn_mapped),
                                                  area_size, PAGE_SIZE);
 
         if (!ramdisk_here)
@@ -392,7 +392,7 @@ static void __init reserve_initrd(void)
 
         initrd_start = 0;
 
-        mapped_size = get_mem_size(max_low_pfn_mapped);
+        mapped_size = get_mem_size(max_pfn_mapped);
         if (ramdisk_size >= (mapped_size>>1))
                 panic("initrd too large to handle, "
                        "disabling initrd (%lld needed, %lld available)\n",
@@ -401,8 +401,7 @@ static void __init reserve_initrd(void)
         printk(KERN_INFO "RAMDISK: [mem %#010llx-%#010llx]\n", ramdisk_image,
                         ramdisk_end - 1);
 
-        if (ramdisk_end <= (max_low_pfn_mapped<<PAGE_SHIFT) &&
-            pfn_range_is_mapped(PFN_DOWN(ramdisk_image),
+        if (pfn_range_is_mapped(PFN_DOWN(ramdisk_image),
                                 PFN_DOWN(ramdisk_end))) {
                 /* All are mapped, easy case */
                 /*