diff options
| -rw-r--r-- | arch/x86/kernel/mpparse.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/arch/x86/kernel/mpparse.c b/arch/x86/kernel/mpparse.c index 7f4d2586972e..37cb1bda1baf 100644 --- a/arch/x86/kernel/mpparse.c +++ b/arch/x86/kernel/mpparse.c @@ -710,13 +710,22 @@ static int __init smp_scan_config(unsigned long base, unsigned long length, * of physical memory; so that simply reserving * PAGE_SIZE from mpf->physptr yields BUG() * in reserve_bootmem. + * also need to make sure physptr is below than + * max_low_pfn + * we don't need reserve the area above max_low_pfn */ unsigned long end = max_low_pfn * PAGE_SIZE; - if (mpf->physptr + size > end) - size = end - mpf->physptr; -#endif + + if (mpf->physptr < end) { + if (mpf->physptr + size > end) + size = end - mpf->physptr; + reserve_bootmem_generic(mpf->physptr, size, + BOOTMEM_DEFAULT); + } +#else reserve_bootmem_generic(mpf->physptr, size, BOOTMEM_DEFAULT); +#endif } return 1; |