From c0fc9b1350a317da22b310d68117b0d01cb9065e Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Tue, 17 Oct 2017 08:49:37 +0200 Subject: [PATCH] x86/tsc: Make CONFIG_X86_TSC=n build work again tsc_async_resets is only available when CONFIG_X86_TSC=y. So a build with CONFIG_X86_TSC=n breaks: arch/x86/kernel/tsc.o: In function `tsc_init': (.init.text+0x87b): undefined reference to `tsc_async_resets' Add a stub define for the TSC=n case. Side note: This config switch should simply be removed. Reported-by: kbuild test robot Fixes: 341102c3ef29 ("x86/tsc: Add option that TSC on Socket 0 being non-zero is valid") Signed-off-by: Thomas Gleixner Cc: Mike Travis --- arch/x86/include/asm/tsc.h | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/x86/include/asm/tsc.h b/arch/x86/include/asm/tsc.h index 79125f3609c4..c016167720b1 100644 --- a/arch/x86/include/asm/tsc.h +++ b/arch/x86/include/asm/tsc.h @@ -42,7 +42,11 @@ extern unsigned long native_calibrate_tsc(void); extern unsigned long long native_sched_clock_from_tsc(u64 tsc); extern int tsc_clocksource_reliable; +#ifdef CONFIG_X86_TSC extern bool tsc_async_resets; +#else +# define tsc_async_resets false +#endif /* * Boot-time check whether the TSCs are synchronized across