From 9adbb9dd4c4eb45e1129fc73d8de69ca72350f81 Mon Sep 17 00:00:00 2001 From: Frederic Weisbecker Date: Wed, 16 Oct 2019 04:56:55 +0200 Subject: [PATCH] sched/vtime: Introduce vtime_accounting_enabled_cpu() This allows us to check if a remote CPU runs vtime accounting (ie: is nohz_full). We'll need that to reliably support reading kcpustat on nohz_full CPUs. Also simplify a bit the condition in the local flavoured function while at it. Signed-off-by: Frederic Weisbecker Signed-off-by: Peter Zijlstra (Intel) Cc: Jacek Anaszewski Cc: Linus Torvalds Cc: Pavel Machek Cc: Peter Zijlstra Cc: Rafael J . Wysocki Cc: Rik van Riel Cc: Thomas Gleixner Cc: Viresh Kumar Cc: Wanpeng Li Cc: Yauheni Kaliuta Link: https://lkml.kernel.org/r/20191016025700.31277-10-frederic@kernel.org Signed-off-by: Ingo Molnar --- include/linux/vtime.h | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-) diff --git a/include/linux/vtime.h b/include/linux/vtime.h index eb2e7a19054b..e2733bf33541 100644 --- a/include/linux/vtime.h +++ b/include/linux/vtime.h @@ -31,14 +31,14 @@ static inline bool vtime_accounting_enabled(void) return context_tracking_enabled(); } -static inline bool vtime_accounting_enabled_this_cpu(void) +static inline bool vtime_accounting_enabled_cpu(int cpu) { - if (vtime_accounting_enabled()) { - if (context_tracking_enabled_this_cpu()) - return true; - } + return (vtime_accounting_enabled() && context_tracking_enabled_cpu(cpu)); +} - return false; +static inline bool vtime_accounting_enabled_this_cpu(void) +{ + return (vtime_accounting_enabled() && context_tracking_enabled_this_cpu()); } extern void vtime_task_switch_generic(struct task_struct *prev); @@ -51,6 +51,7 @@ static inline void vtime_task_switch(struct task_struct *prev) #else /* !CONFIG_VIRT_CPU_ACCOUNTING */ +static inline bool vtime_accounting_enabled_cpu(int cpu) {return false; } static inline bool vtime_accounting_enabled_this_cpu(void) { return false; } static inline void vtime_task_switch(struct task_struct *prev) { } -- 2.20.1