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

* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-tip:
  x86, irq: Check move_in_progress before freeing the vector mapping
  x86: copy_from_user() should not return -EFAULT
  Revert "x86: Side-step lguest problem by only building cmpxchg8b_emu for pre-Pentium"
  x86/pci: Intel ioh bus num reg accessing fix
  x86: Fix size for ex trampoline with 32bit

2 files changed, 9 insertions, 2 deletions

diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index de00c4619a55..53243ca7816d 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -2434,6 +2434,13 @@ asmlinkage void smp_irq_move_cleanup_interrupt(void)
                 cfg = irq_cfg(irq);
                 raw_spin_lock(&desc->lock);
 
+                /*
+                 * Check if the irq migration is in progress. If so, we
+                 * haven't received the cleanup request yet for this irq.
+                 */
+                if (cfg->move_in_progress)
+                        goto unlock;
+
                 if (vector == cfg->vector && cpumask_test_cpu(me, cfg->domain))
                         goto unlock;
 
diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c
index 05ed7ab2ca48..a1a7876cadcb 100644
--- a/arch/x86/kernel/e820.c
+++ b/arch/x86/kernel/e820.c
@@ -733,13 +733,13 @@ struct early_res {
 };
 static struct early_res early_res[MAX_EARLY_RES] __initdata = {
         { 0, PAGE_SIZE, "BIOS data page", 1 },  /* BIOS data page */
-#ifdef CONFIG_X86_32
+#if defined(CONFIG_X86_32) && defined(CONFIG_X86_TRAMPOLINE)
         /*
          * But first pinch a few for the stack/trampoline stuff
          * FIXME: Don't need the extra page at 4K, but need to fix
          * trampoline before removing it. (see the GDT stuff)
          */
-        { PAGE_SIZE, PAGE_SIZE, "EX TRAMPOLINE", 1 },
+        { PAGE_SIZE, PAGE_SIZE + PAGE_SIZE, "EX TRAMPOLINE", 1 },
 #endif
 
         {}