--- arch/x86/include/asm/system.h

+++ arch/x86/include/asm/system.h

@@ -449,7 +449,7 @@ void stop_this_cpu(void *dummy);

*

* (Could use an alternative three way for this if there was one.)

*/

-static inline void rdtsc_barrier(void)

+static __always_inline void rdtsc_barrier(void)

{

alternative(ASM_NOP3, "mfence", X86_FEATURE_MFENCE_RDTSC);

alternative(ASM_NOP3, "lfence", X86_FEATURE_LFENCE_RDTSC);