mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-15 23:56:45 +07:00
876e78818d
In preparation of adding another tkr field, rename this one to tkr_mono. Also rename tk_read_base::base_mono to tk_read_base::base, since the structure is not specific to CLOCK_MONOTONIC and the mono name got added to the tk_read_base instance. Lots of trivial churn. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: John Stultz <john.stultz@linaro.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20150319093400.344679419@infradead.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
71 lines
2.1 KiB
C
71 lines
2.1 KiB
C
/*
|
|
* Copyright (C) 2001 Andrea Arcangeli <andrea@suse.de> SuSE
|
|
* Copyright 2003 Andi Kleen, SuSE Labs.
|
|
*
|
|
* Modified for x86 32 bit architecture by
|
|
* Stefani Seibold <stefani@seibold.net>
|
|
* sponsored by Rohde & Schwarz GmbH & Co. KG Munich/Germany
|
|
*
|
|
* Thanks to hpa@transmeta.com for some useful hint.
|
|
* Special thanks to Ingo Molnar for his early experience with
|
|
* a different vsyscall implementation for Linux/IA32 and for the name.
|
|
*
|
|
*/
|
|
|
|
#include <linux/timekeeper_internal.h>
|
|
#include <asm/vgtod.h>
|
|
#include <asm/vvar.h>
|
|
|
|
DEFINE_VVAR(struct vsyscall_gtod_data, vsyscall_gtod_data);
|
|
|
|
void update_vsyscall_tz(void)
|
|
{
|
|
vsyscall_gtod_data.tz_minuteswest = sys_tz.tz_minuteswest;
|
|
vsyscall_gtod_data.tz_dsttime = sys_tz.tz_dsttime;
|
|
}
|
|
|
|
void update_vsyscall(struct timekeeper *tk)
|
|
{
|
|
struct vsyscall_gtod_data *vdata = &vsyscall_gtod_data;
|
|
|
|
gtod_write_begin(vdata);
|
|
|
|
/* copy vsyscall data */
|
|
vdata->vclock_mode = tk->tkr_mono.clock->archdata.vclock_mode;
|
|
vdata->cycle_last = tk->tkr_mono.cycle_last;
|
|
vdata->mask = tk->tkr_mono.mask;
|
|
vdata->mult = tk->tkr_mono.mult;
|
|
vdata->shift = tk->tkr_mono.shift;
|
|
|
|
vdata->wall_time_sec = tk->xtime_sec;
|
|
vdata->wall_time_snsec = tk->tkr_mono.xtime_nsec;
|
|
|
|
vdata->monotonic_time_sec = tk->xtime_sec
|
|
+ tk->wall_to_monotonic.tv_sec;
|
|
vdata->monotonic_time_snsec = tk->tkr_mono.xtime_nsec
|
|
+ ((u64)tk->wall_to_monotonic.tv_nsec
|
|
<< tk->tkr_mono.shift);
|
|
while (vdata->monotonic_time_snsec >=
|
|
(((u64)NSEC_PER_SEC) << tk->tkr_mono.shift)) {
|
|
vdata->monotonic_time_snsec -=
|
|
((u64)NSEC_PER_SEC) << tk->tkr_mono.shift;
|
|
vdata->monotonic_time_sec++;
|
|
}
|
|
|
|
vdata->wall_time_coarse_sec = tk->xtime_sec;
|
|
vdata->wall_time_coarse_nsec = (long)(tk->tkr_mono.xtime_nsec >>
|
|
tk->tkr_mono.shift);
|
|
|
|
vdata->monotonic_time_coarse_sec =
|
|
vdata->wall_time_coarse_sec + tk->wall_to_monotonic.tv_sec;
|
|
vdata->monotonic_time_coarse_nsec =
|
|
vdata->wall_time_coarse_nsec + tk->wall_to_monotonic.tv_nsec;
|
|
|
|
while (vdata->monotonic_time_coarse_nsec >= NSEC_PER_SEC) {
|
|
vdata->monotonic_time_coarse_nsec -= NSEC_PER_SEC;
|
|
vdata->monotonic_time_coarse_sec++;
|
|
}
|
|
|
|
gtod_write_end(vdata);
|
|
}
|