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

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86: (613 commits)
  x86: standalone trampoline code
  x86: move suspend wakeup code to C
  x86: coding style fixes to arch/x86/kernel/acpi/sleep.c
  x86: setup_trampoline() - fix section mismatch warning
  x86: section mismatch fixes, #1
  x86: fix paranoia about using BIOS quickboot mechanism.
  x86: print out buggy mptable
  x86: use cpu_online()
  x86: use cpumask_of_cpu()
  x86: remove unnecessary tmp local variable
  x86: remove unnecessary memset()
  x86: use ioapic_read_entry() and ioapic_write_entry()
  x86: avoid redundant loop in io_apic_level_ack_pending()
  x86: remove superfluous initialisation in boot code.
  x86: merge mpparse_{32,64}.c
  x86: unify mp_register_gsi
  x86: unify mp_config_acpi_legacy_irqs
  x86: unify mp_register_ioapic
  x86: unify uniq_io_apic_id
  x86: unify smp_scan_config
  ...

1 files changed, 13 insertions, 1 deletions

diff --git a/arch/x86/kernel/bugs_64.c b/arch/x86/kernel/bugs_64.c
index 8f520f93ffd4..9a3ed0649d4e 100644
--- a/arch/x86/kernel/bugs_64.c
+++ b/arch/x86/kernel/bugs_64.c
@@ -9,13 +9,25 @@
 #include <asm/bugs.h>
 #include <asm/processor.h>
 #include <asm/mtrr.h>
+#include <asm/cacheflush.h>
 
 void __init check_bugs(void)
 {
-        identify_cpu(&boot_cpu_data);
+        identify_boot_cpu();
 #if !defined(CONFIG_SMP)
         printk("CPU: ");
         print_cpu_info(&boot_cpu_data);
 #endif
         alternative_instructions();
+
+        /*
+         * Make sure the first 2MB area is not mapped by huge pages
+         * There are typically fixed size MTRRs in there and overlapping
+         * MTRRs into large pages causes slow downs.
+         *
+         * Right now we don't do that with gbpages because there seems
+         * very little benefit for that case.
+         */
+        if (!direct_gbpages)
+                set_memory_4k((unsigned long)__va(0), 1);
 }