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UPSTREAM: linux/time64.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 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
(cherry picked from commit b72a9c5e023bf405e62b858eb5384eb34e2b7a74)
Signed-off-by: Mark Salyzyn <salyzyn@google.com>
Bug: 154668398
Change-Id: I1605b57089a74c4701e8aa0157eb38313e560634
This commit is contained in:
Vincenzo Frascino 2020-03-20 14:53:37 +00:00 committed by Alistair Delva
parent b48b451aec
commit 35da0c2855
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;
@ -27,15 +28,6 @@ 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 KTIME_MAX ((s64)~((u64)1 << 63))

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 */