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-rw-r--r--runtime/autoconf-tsc-khz.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/runtime/autoconf-tsc-khz.c b/runtime/autoconf-tsc-khz.c
index d6424251..6c3f453e 100644
--- a/runtime/autoconf-tsc-khz.c
+++ b/runtime/autoconf-tsc-khz.c
@@ -1,3 +1,7 @@
+#include <linux/version.h>
#include <asm/tsc.h>
-unsigned int tsc = tsc_khz;
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,23)) && defined(__i386__)
+#error "tsc_khz is not exported"
+#endif
+unsigned int *ptsc = &tsc_khz;