d723647378
The new struct __kernel_timespec is similar to current
internal kernel struct timespec64 on 64 bit architecture.
The compat structure however is similar to below on little
endian systems (padding and tv_nsec are switched for big
endian systems):
typedef s32 compat_long_t;
typedef s64 compat_kernel_time64_t;
struct compat_kernel_timespec {
compat_kernel_time64_t tv_sec;
compat_long_t tv_nsec;
compat_long_t padding;
};
This allows for both the native and compat representations to
be the same and syscalls using this type as part of their ABI
can have a single entry point to both.
Note that the compat define is not included anywhere in the
kernel explicitly to avoid confusion.
These types will be used by the new syscalls that will be
introduced in the consequent patches.
Most of the new syscalls are just an update to the existing
native ones with this new type. Hence, put this new type under
an ifdef so that the architectures can define CONFIG_64BIT_TIME
when they are ready to handle this switch.
Cc: linux-arch@vger.kernel.org
Change-Id: I06fbf455714d0f1bae69b9ac9def451e9a5abd53
Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
94 lines
2.3 KiB
C
94 lines
2.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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#ifndef _UAPI_LINUX_TIME_H
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#define _UAPI_LINUX_TIME_H
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#include <linux/types.h>
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#ifndef _STRUCT_TIMESPEC
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#define _STRUCT_TIMESPEC
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struct timespec {
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__kernel_time_t tv_sec; /* seconds */
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long tv_nsec; /* nanoseconds */
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};
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#endif
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struct timeval {
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__kernel_time_t tv_sec; /* seconds */
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__kernel_suseconds_t tv_usec; /* microseconds */
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};
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struct timezone {
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int tz_minuteswest; /* minutes west of Greenwich */
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int tz_dsttime; /* type of dst correction */
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};
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/*
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* Names of the interval timers, and structure
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* defining a timer setting:
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*/
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#define ITIMER_REAL 0
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#define ITIMER_VIRTUAL 1
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#define ITIMER_PROF 2
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struct itimerspec {
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struct timespec it_interval; /* timer period */
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struct timespec it_value; /* timer expiration */
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};
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struct itimerval {
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struct timeval it_interval; /* timer interval */
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struct timeval it_value; /* current value */
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};
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#ifndef __kernel_timespec
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struct __kernel_timespec {
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__kernel_time64_t tv_sec; /* seconds */
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long long tv_nsec; /* nanoseconds */
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};
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#endif
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/*
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* legacy timeval structure, only embedded in structures that
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* traditionally used 'timeval' to pass time intervals (not absolute
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* times). Do not add new users. If user space fails to compile
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* here, this is probably because it is not y2038 safe and needs to
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* be changed to use another interface.
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*/
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struct __kernel_old_timeval {
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__kernel_long_t tv_sec;
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__kernel_long_t tv_usec;
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};
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/*
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* The IDs of the various system clocks (for POSIX.1b interval timers):
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*/
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#define CLOCK_REALTIME 0
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#define CLOCK_MONOTONIC 1
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#define CLOCK_PROCESS_CPUTIME_ID 2
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#define CLOCK_THREAD_CPUTIME_ID 3
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#define CLOCK_MONOTONIC_RAW 4
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#define CLOCK_REALTIME_COARSE 5
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#define CLOCK_MONOTONIC_COARSE 6
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#define CLOCK_BOOTTIME 7
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#define CLOCK_REALTIME_ALARM 8
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#define CLOCK_BOOTTIME_ALARM 9
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/*
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* The driver implementing this got removed. The clock ID is kept as a
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* place holder. Do not reuse!
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*/
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#define CLOCK_SGI_CYCLE 10
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#define CLOCK_TAI 11
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#define MAX_CLOCKS 16
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#define CLOCKS_MASK (CLOCK_REALTIME | CLOCK_MONOTONIC)
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#define CLOCKS_MONO CLOCK_MONOTONIC
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/*
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* The various flags for setting POSIX.1b interval timers:
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*/
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#define TIMER_ABSTIME 0x01
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#endif /* _UAPI_LINUX_TIME_H */
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