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OpenCloudOS-Kernel
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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
This commit is contained in:
Linus Torvalds 2009-06-12 09:26:32 -07:00
parent 8ebf975608 1260866a27
commit db8e7f10ed
2 changed files with 5 additions and 12 deletions
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15
arch/x86/kernel/setup.c
View File

@ -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

2
arch/x86/kernel/vmlinux.lds.S
View File

@ -108,6 +108,8 @@ SECTIONS
/* Data */
. = ALIGN(PAGE_SIZE);
.data : AT(ADDR(.data) - LOAD_OFFSET) {
/* Start of data section */
_sdata = .;
DATA_DATA
CONSTRUCTORS