From 726634a6a31a685e69c954db32b6e8aa048c2ad2 Mon Sep 17 00:00:00 2001 From: Yinghai Lu Date: Thu, 4 Jun 2009 19:14:22 -0700 Subject: [PATCH] x86: handle initrd that extends into unusable memory commit 8c5dd8f43367f4f266dd616f11658005bc2d20ef upstream. On a system where system memory (according e820) is not covered by mtrr, mtrr_trim_memory converts a portion of memory to reserved, but bootloader has already put the initrd in that range. Thus, we need to have 64bit to use relocate_initrd too. [ Impact: fix using initrd when mtrr_trim_memory happen ] Signed-off-by: Yinghai Lu Signed-off-by: H. Peter Anvin Signed-off-by: Greg Kroah-Hartman --- arch/x86/kernel/setup.c | 15 +++------------ 1 file changed, 3 insertions(+), 12 deletions(-) diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c index 6a8811a693245..12f68024cd110 100644 --- a/arch/x86/kernel/setup.c +++ b/arch/x86/kernel/setup.c @@ -255,15 +255,13 @@ static inline void copy_edd(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; @@ -319,14 +317,13 @@ 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) @@ -356,14 +353,8 @@ 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 -- 2.47.2