diff options
| author | Miroslav Lichvar <mlichvar@redhat.com> | 2017-11-13 14:51:31 -0800 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2017-11-14 11:20:25 +0100 |
| commit | aea3706cfc4d952ed6d32b6d5845b5ecd99ed7f5 (patch) | |
| tree | d013bbdd25babdce72f2c9e1b899cb94ef728f69 /kernel/time | |
| parent | 558de28249508dc3ec0ec8981d1315eb8b63f0d9 (diff) | |
timekeeping: Remove CONFIG_GENERIC_TIME_VSYSCALL_OLD
As of d4d1fc61eb38f (ia64: Update fsyscall gettime to use modern
vsyscall_update)the last user of CONFIG_GENERIC_TIME_VSYSCALL_OLD
have been updated, the legacy support for old-style vsyscall
implementations can be removed from the timekeeping code.
(Thanks again to Tony Luck for helping remove the last user!)
[jstultz: Commit message rework]
Signed-off-by: Miroslav Lichvar <mlichvar@redhat.com>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Richard Cochran <richardcochran@gmail.com>
Cc: Stephen Boyd <stephen.boyd@linaro.org>
Link: https://lkml.kernel.org/r/1510613491-16695-1-git-send-email-john.stultz@linaro.org
Diffstat (limited to 'kernel/time')
| -rw-r--r-- | kernel/time/Kconfig | 4 | ||||
| -rw-r--r-- | kernel/time/timekeeping.c | 45 |
2 files changed, 0 insertions, 49 deletions
diff --git a/kernel/time/Kconfig b/kernel/time/Kconfig index d689a9557e17..e776fc8cc1df 100644 --- a/kernel/time/Kconfig +++ b/kernel/time/Kconfig @@ -21,10 +21,6 @@ config CLOCKSOURCE_VALIDATE_LAST_CYCLE config GENERIC_TIME_VSYSCALL bool -# Timekeeping vsyscall support -config GENERIC_TIME_VSYSCALL_OLD - bool - # Old style timekeeping config ARCH_USES_GETTIMEOFFSET bool diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c index 198afa78bf69..cd03317e7b57 100644 --- a/kernel/time/timekeeping.c +++ b/kernel/time/timekeeping.c @@ -557,45 +557,6 @@ static void halt_fast_timekeeper(struct timekeeper *tk) update_fast_timekeeper(&tkr_dummy, &tk_fast_raw); } -#ifdef CONFIG_GENERIC_TIME_VSYSCALL_OLD -#warning Please contact your maintainers, as GENERIC_TIME_VSYSCALL_OLD compatibity will disappear soon. - -static inline void update_vsyscall(struct timekeeper *tk) -{ - struct timespec xt, wm; - - xt = timespec64_to_timespec(tk_xtime(tk)); - wm = timespec64_to_timespec(tk->wall_to_monotonic); - update_vsyscall_old(&xt, &wm, tk->tkr_mono.clock, tk->tkr_mono.mult, - tk->tkr_mono.cycle_last); -} - -static inline void old_vsyscall_fixup(struct timekeeper *tk) -{ - s64 remainder; - - /* - * Store only full nanoseconds into xtime_nsec after rounding - * it up and add the remainder to the error difference. - * XXX - This is necessary to avoid small 1ns inconsistnecies caused - * by truncating the remainder in vsyscalls. However, it causes - * additional work to be done in timekeeping_adjust(). Once - * the vsyscall implementations are converted to use xtime_nsec - * (shifted nanoseconds), and CONFIG_GENERIC_TIME_VSYSCALL_OLD - * users are removed, this can be killed. - */ - remainder = tk->tkr_mono.xtime_nsec & ((1ULL << tk->tkr_mono.shift) - 1); - if (remainder != 0) { - tk->tkr_mono.xtime_nsec -= remainder; - tk->tkr_mono.xtime_nsec += 1ULL << tk->tkr_mono.shift; - tk->ntp_error += remainder << tk->ntp_error_shift; - tk->ntp_error -= (1ULL << tk->tkr_mono.shift) << tk->ntp_error_shift; - } -} -#else -#define old_vsyscall_fixup(tk) -#endif - static RAW_NOTIFIER_HEAD(pvclock_gtod_chain); static void update_pvclock_gtod(struct timekeeper *tk, bool was_set) @@ -2164,12 +2125,6 @@ void update_wall_time(void) timekeeping_adjust(tk, offset); /* - * XXX This can be killed once everyone converts - * to the new update_vsyscall. - */ - old_vsyscall_fixup(tk); - - /* * Finally, make sure that after the rounding * xtime_nsec isn't larger than NSEC_PER_SEC */ |