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linux/time64.h: Extract common header for vDSO 

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 time64.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/20200320145351.32292-13-vincenzo.frascino@arm.com
This commit is contained in:
Vincenzo Frascino 2020-03-20 14:53:37 +00:00 committed by Thomas Gleixner
parent 9a41623169
commit b72a9c5e02
2 changed files with 15 additions and 9 deletions
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10
include/linux/time64.h
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@ -3,6 +3,7 @@
#define _LINUX_TIME64_H
#include <linux/math64.h>
#include <vdso/time64.h>
typedef __s64 time64_t;
typedef __u64 timeu64_t;
@ -19,15 +20,6 @@ struct itimerspec64 {
struct timespec64 it_value;
};
/* Parameters used to convert the timespec values: */
#define MSEC_PER_SEC 1000L
#define USEC_PER_MSEC 1000L
#define NSEC_PER_USEC 1000L
#define NSEC_PER_MSEC 1000000L
#define USEC_PER_SEC 1000000L
#define NSEC_PER_SEC 1000000000L
#define FSEC_PER_SEC 1000000000000000LL
/* Located here for timespec[64]_valid_strict */
#define TIME64_MAX ((s64)~((u64)1 << 63))
#define TIME64_MIN (-TIME64_MAX - 1)

14
include/vdso/time64.h Normal file
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@ -0,0 +1,14 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __VDSO_TIME64_H
#define __VDSO_TIME64_H
/* Parameters used to convert the timespec values: */
#define MSEC_PER_SEC 1000L
#define USEC_PER_MSEC 1000L
#define NSEC_PER_USEC 1000L
#define NSEC_PER_MSEC 1000000L
#define USEC_PER_SEC 1000000L
#define NSEC_PER_SEC 1000000000L
#define FSEC_PER_SEC 1000000000000000LL
#endif /* __VDSO_TIME64_H */