From 6fa7e8ccd2e4a482437c73ff74a99a75cc1801ba Mon Sep 17 00:00:00 2001
From: Martin Kroeker <martin@ruby.chemie.uni-freiburg.de>
Date: Mon, 11 Jun 2018 00:02:05 +0200
Subject: [PATCH] Return a somewhat sane default value for L2 cache size if
 cpuid returned something unexpected

Fixes #1610, the KVM hypervisor on Google Chromebooks returning zero for CPUID  0x80000006, causing DYNAMIC_ARCH
builds of OpenBLAS to hang
---
 kernel/setparam-ref.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/kernel/setparam-ref.c b/kernel/setparam-ref.c
index 9030d7c6d..2bb54b406 100644
--- a/kernel/setparam-ref.c
+++ b/kernel/setparam-ref.c
@@ -647,7 +647,9 @@ static int get_l2_size_old(void){
       return 6144;
     }
   }
-  return 0;
+//  return 0;
+fprintf (stderr,"OpenBLAS WARNING - could not determine the L2 cache size on this system, assuming 256k\n");
+return 256;
 }
 #endif