Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86: Provide _sdata in the vmlinux.lds.S file
  x86: handle initrd that extends into unusable memory

2 files changed, 5 insertions, 12 deletions

diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index d1c636bf31a7..be5ae80f897f 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -301,15 +301,13 @@ static void __init reserve_brk(void)
 
 #ifdef CONFIG_BLK_DEV_INITRD
 
-#ifdef CONFIG_X86_32
-
 #define MAX_MAP_CHUNK   (NR_FIX_BTMAPS << PAGE_SHIFT)
 static void __init relocate_initrd(void)
 {
 
         u64 ramdisk_image = boot_params.hdr.ramdisk_image;
         u64 ramdisk_size  = boot_params.hdr.ramdisk_size;
-        u64 end_of_lowmem = max_low_pfn << PAGE_SHIFT;
+        u64 end_of_lowmem = max_low_pfn_mapped << PAGE_SHIFT;
         u64 ramdisk_here;
         unsigned long slop, clen, mapaddr;
         char *p, *q;
@@ -365,14 +363,13 @@ static void __init relocate_initrd(void)
                 ramdisk_image, ramdisk_image + ramdisk_size - 1,
                 ramdisk_here, ramdisk_here + ramdisk_size - 1);
 }
-#endif
 
 static void __init reserve_initrd(void)
 {
         u64 ramdisk_image = boot_params.hdr.ramdisk_image;
         u64 ramdisk_size  = boot_params.hdr.ramdisk_size;
         u64 ramdisk_end   = ramdisk_image + ramdisk_size;
-        u64 end_of_lowmem = max_low_pfn << PAGE_SHIFT;
+        u64 end_of_lowmem = max_low_pfn_mapped << PAGE_SHIFT;
 
         if (!boot_params.hdr.type_of_loader ||
             !ramdisk_image || !ramdisk_size)
@@ -402,14 +399,8 @@ static void __init reserve_initrd(void)
                 return;
         }
 
-#ifdef CONFIG_X86_32
         relocate_initrd();
-#else
-        printk(KERN_ERR "initrd extends beyond end of memory "
-               "(0x%08llx > 0x%08llx)\ndisabling initrd\n",
-               ramdisk_end, end_of_lowmem);
-        initrd_start = 0;
-#endif
+
         free_early(ramdisk_image, ramdisk_end);
 }
 #else
diff --git a/arch/x86/kernel/vmlinux.lds.S b/arch/x86/kernel/vmlinux.lds.S
index 4c85b2e2bb65..367e87882041 100644
--- a/arch/x86/kernel/vmlinux.lds.S
+++ b/arch/x86/kernel/vmlinux.lds.S
@@ -108,6 +108,8 @@ SECTIONS
         /* Data */
         . = ALIGN(PAGE_SIZE);
         .data : AT(ADDR(.data) - LOAD_OFFSET) {
+                /* Start of data section */
+                _sdata = .;
                 DATA_DATA
                 CONSTRUCTORS