From d69690fc781de625fc8571409b24bd4a07f986b0 Mon Sep 17 00:00:00 2001 From: Luis Gerhorst <luis.gerhorst@fau.de> Date: Mon, 18 Jun 2018 23:39:14 +0200 Subject: [PATCH] Wait with ktime_get() loop --- arch/arm/measuremore/trigger.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/arch/arm/measuremore/trigger.c b/arch/arm/measuremore/trigger.c index ac2bea7afe795..2f649ef5059f1 100644 --- a/arch/arm/measuremore/trigger.c +++ b/arch/arm/measuremore/trigger.c @@ -184,7 +184,12 @@ static int memo_trigger(void) { for (unsigned long i = 0; i < reps; i++) { memo_start_run(); memo_checkpoint("start"); - udelay(delay_us); + const ktime_t start_ktime = ktime_get(); + s64 elapsed_ns; + do { + elapsed_ns = ktime_to_ns( + ktime_sub(ktime_get(), start_ktime)); + } while (elapsed_ns < delay_ns); memo_checkpoint("stop"); memo_stop_run(); } -- GitLab