linux-stable/include/linux/sched_clock.h
Daniel Lezcano 364eba4b3a time: Define dummy functions for the generic sched clock
When we try to compile a clocksource driver with the COMPILE_TEST option,
we can't select the GENERIC_SCHED_CLOCK because the sched_clock() symbol
will be duplicated with the one defined for the x86.

In order to fix that, we don't select the GENERIC_SCHED_CLOCK in the
driver Kconfig's file but we define some empty functions for the different
symbols in order to prevent the unresolved ones.

This patch fixes the COMPILE_TEST option for the compile test coverage for
the clocksource drivers. Without this patch, we can't add the COMPILE_TEST
option for the clocksource drivers using the GENERIC_SCHED_CLOCK.

Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2015-12-15 09:41:09 +01:00

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C

/*
* sched_clock.h: support for extending counters to full 64-bit ns counter
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef LINUX_SCHED_CLOCK
#define LINUX_SCHED_CLOCK
#ifdef CONFIG_GENERIC_SCHED_CLOCK
extern void sched_clock_postinit(void);
extern void sched_clock_register(u64 (*read)(void), int bits,
unsigned long rate);
#else
static inline void sched_clock_postinit(void) { }
static inline void sched_clock_register(u64 (*read)(void), int bits,
unsigned long rate)
{
;
}
#endif
#endif