Commit c0fc9b13 authored Oct 17, 2017 by Thomas Gleixner

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 <fengguang.wu@intel.com>
Fixes: 341102c3 ("x86/tsc: Add option that TSC on Socket 0 being non-zero is valid")
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Mike Travis <mike.travis@hpe.com>

parent 97d21003

arch/x86/include/asm/tsc.h

+4 −0

Original line number	Diff line number	Diff line
		@@ -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