diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2020-02-07 13:39:00 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2020-02-17 20:12:17 +0100 |
| commit | c7a18100bdffdff440c7291db6e80863fab0461e (patch) | |
| tree | b8a7edb0fa964b98fefd464ad7d69fcd6a2cd7f7 /kernel/time/vsyscall.c | |
| parent | f86fd32db706613fe8d0104057efa6e83e0d7e8f (diff) | |
| download | linux-c7a18100bdffdff440c7291db6e80863fab0461e.tar.gz | |
lib/vdso: Avoid highres update if clocksource is not VDSO capable
If the current clocksource is not VDSO capable there is no point in
updating the high resolution parts of the VDSO data.
Replace the architecture specific check with a check for a VDSO capable
clocksource and skip the update if there is none.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Reviewed-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Link: https://lkml.kernel.org/r/20200207124403.563379423@linutronix.de
Diffstat (limited to 'kernel/time/vsyscall.c')
| -rw-r--r-- | kernel/time/vsyscall.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/kernel/time/vsyscall.c b/kernel/time/vsyscall.c index d31a5ef4ade51b..54ce6eb2ca36db 100644 --- a/kernel/time/vsyscall.c +++ b/kernel/time/vsyscall.c @@ -105,10 +105,10 @@ void update_vsyscall(struct timekeeper *tk) WRITE_ONCE(vdata[CS_HRES_COARSE].hrtimer_res, hrtimer_resolution); /* - * Architectures can opt out of updating the high resolution part - * of the VDSO. + * If the current clocksource is not VDSO capable, then spare the + * update of the high reolution parts. */ - if (__arch_update_vdso_data()) + if (clock_mode != VDSO_CLOCKMODE_NONE) update_vdso_data(vdata, tk); __arch_update_vsyscall(vdata, tk); |