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

Pull x86 fixes from Peter Anvin:
 "Two x86 fixes: Suresh's eager FPU fix, and a fix to the NUMA quirk for
  AMD northbridges.

  This only includes Suresh's fix patch, not the "mostly a cleanup"
  patch which had __init issues"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/amd/numa: Fix northbridge quirk to assign correct NUMA node
  x86, fpu: Check tsk_used_math() in kernel_fpu_end() for eager FPU

2 files changed, 13 insertions, 4 deletions

diff --git a/arch/x86/kernel/i387.c b/arch/x86/kernel/i387.c
index e8368c6dd2a2..d5dd80814419 100644
--- a/arch/x86/kernel/i387.c
+++ b/arch/x86/kernel/i387.c
@@ -86,10 +86,19 @@ EXPORT_SYMBOL(__kernel_fpu_begin);
 
 void __kernel_fpu_end(void)
 {
-        if (use_eager_fpu())
-                math_state_restore();
-        else
+        if (use_eager_fpu()) {
+                /*
+                 * For eager fpu, most the time, tsk_used_math() is true.
+                 * Restore the user math as we are done with the kernel usage.
+                 * At few instances during thread exit, signal handling etc,
+                 * tsk_used_math() is false. Those few places will take proper
+                 * actions, so we don't need to restore the math here.
+                 */
+                if (likely(tsk_used_math(current)))
+                        math_state_restore();
+        } else {
                 stts();
+        }
 }
 EXPORT_SYMBOL(__kernel_fpu_end);
 
diff --git a/arch/x86/kernel/quirks.c b/arch/x86/kernel/quirks.c
index 7c6acd4b8995..ff898bbf579d 100644
--- a/arch/x86/kernel/quirks.c
+++ b/arch/x86/kernel/quirks.c
@@ -529,7 +529,7 @@ static void quirk_amd_nb_node(struct pci_dev *dev)
                 return;
 
         pci_read_config_dword(nb_ht, 0x60, &val);
-        node = val & 7;
+        node = pcibus_to_node(dev->bus) | (val & 7);
         /*
          * Some hardware may return an invalid node ID,
          * so check it first: