1 files changed, 4 insertions, 0 deletions

diff --git a/include/asm-x86/tsc.h b/include/asm-x86/tsc.h
index a4d806610b7f..2002f8d6d20a 100644
--- a/include/asm-x86/tsc.h
+++ b/include/asm-x86/tsc.h
@@ -72,4 +72,8 @@ int check_tsc_unstable(void);
 extern void check_tsc_sync_source(int cpu);
 extern void check_tsc_sync_target(void);
 
+#ifdef CONFIG_X86_64
+extern void tsc_calibrate(void);
+#endif
+
 #endif