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 <frede...@kernel.org>
Cc: Yauheni Kaliuta <yauheni.kali...@redhat.com>
Cc: Thomas Gleixner <t...@linutronix.de>
Cc: Rik van Riel <r...@surriel.com>
Cc: Peter Zijlstra <pet...@infradead.org>
Cc: Wanpeng Li <wanpen...@tencent.com>
Cc: Ingo Molnar <mi...@kernel.org>
---
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_cpu(int cpu)
+{
+ return (vtime_accounting_enabled() &&
context_tracking_enabled_cpu(cpu));
+}
+
static inline bool vtime_accounting_enabled_this_cpu(void)
{
- if (vtime_accounting_enabled()) {
- if (context_tracking_enabled_this_cpu())
- return true;
- }
-
- return false;
+ 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) { }
--
2.23.0
