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

* 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86-64: Fix CFI data for interrupt frames
  x86-64: Don't apply destructive erratum workaround on unaffected CPUs

1 files changed, 7 insertions, 1 deletions

diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c
index 0d17c8c50acd..9c7378df740a 100644
--- a/arch/x86/mm/fault.c
+++ b/arch/x86/mm/fault.c
@@ -420,12 +420,14 @@ static noinline __kprobes int vmalloc_fault(unsigned long address)
         return 0;
 }
 
+#ifdef CONFIG_CPU_SUP_AMD
 static const char errata93_warning[] =
 KERN_ERR 
 "******* Your BIOS seems to not contain a fix for K8 errata #93\n"
 "******* Working around it, but it may cause SEGVs or burn power.\n"
 "******* Please consider a BIOS update.\n"
 "******* Disabling USB legacy in the BIOS may also help.\n";
+#endif
 
 /*
  * No vm86 mode in 64-bit mode:
@@ -505,7 +507,11 @@ bad:
  */
 static int is_errata93(struct pt_regs *regs, unsigned long address)
 {
-#ifdef CONFIG_X86_64
+#if defined(CONFIG_X86_64) && defined(CONFIG_CPU_SUP_AMD)
+        if (boot_cpu_data.x86_vendor != X86_VENDOR_AMD
+            || boot_cpu_data.x86 != 0xf)
+                return 0;
+
         if (address != regs->ip)
                 return 0;