x86: cleanup for setup code crashes during IST probe

Clean up the code for crashes during SpeedStep probing on older
machines.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 2 insertions, 1 deletions

diff --git a/arch/x86/boot/main.c b/arch/x86/boot/main.c
index 01aa64b5575b..197421db1af1 100644
--- a/arch/x86/boot/main.c
+++ b/arch/x86/boot/main.c
@@ -73,7 +73,8 @@ static void keyboard_set_repeat(void)
  */
 static void query_ist(void)
 {
-        /* Some 486 BIOSes apparently crash on this call */
+        /* Some older BIOSes apparently crash on this call, so filter
+           it from machines too old to have SpeedStep at all. */
         if (cpu.level < 6)
                 return;