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linux/clocksource.h: Extract common header for vDSO

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The vDSO library should only include the necessary headers required for
a userspace library (UAPI and a minimal set of kernel headers). To make
this possible it is necessary to isolate from the kernel headers the
common parts that are strictly necessary to build the library.

Split clocksource.h into linux and common headers to make the latter
suitable for inclusion in the vDSO library.

Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/20200320145351.32292-9-vincenzo.frascino@arm.com
This commit is contained in:
Vincenzo Frascino 2020-03-20 14:53:33 +00:00 committed by Thomas Gleixner
parent 17e46656a8
commit 14ee2ac618
2 changed files with 24 additions and 10 deletions
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11
include/linux/clocksource.h
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@ -28,16 +28,7 @@ struct module;
#include <asm/clocksource.h>
#endif
enum vdso_clock_mode {
VDSO_CLOCKMODE_NONE,
#ifdef CONFIG_GENERIC_GETTIMEOFDAY
VDSO_ARCH_CLOCKMODES,
#endif
VDSO_CLOCKMODE_MAX,
/* Indicator for time namespace VDSO */
VDSO_CLOCKMODE_TIMENS = INT_MAX
};
#include <vdso/clocksource.h>
/**
* struct clocksource - hardware abstraction for a free running counter

23
include/vdso/clocksource.h Normal file
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@ -0,0 +1,23 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __VDSO_CLOCKSOURCE_H
#define __VDSO_CLOCKSOURCE_H
#include <vdso/limits.h>
#if defined(CONFIG_ARCH_CLOCKSOURCE_DATA) || \
defined(CONFIG_GENERIC_GETTIMEOFDAY)
#include <asm/vdso/clocksource.h>
#endif /* CONFIG_ARCH_CLOCKSOURCE_DATA || CONFIG_GENERIC_GETTIMEOFDAY */
enum vdso_clock_mode {
VDSO_CLOCKMODE_NONE,
#ifdef CONFIG_GENERIC_GETTIMEOFDAY
VDSO_ARCH_CLOCKMODES,
#endif
VDSO_CLOCKMODE_MAX,
/* Indicator for time namespace VDSO */
VDSO_CLOCKMODE_TIMENS = INT_MAX
};
#endif /* __VDSO_CLOCKSOURCE_H */