rcu/context_tracking: Move dynticks_nesting to context tracking

The RCU eqs tracking is going to be performed by the context tracking
subsystem. The related nesting counters thus need to be moved to the
context tracking structure.

Acked-by: Paul E. McKenney <[email protected]>
Signed-off-by: Frederic Weisbecker <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Neeraj Upadhyay <[email protected]>
Cc: Uladzislau Rezki <[email protected]>
Cc: Joel Fernandes <[email protected]>
Cc: Boqun Feng <[email protected]>
Cc: Nicolas Saenz Julienne <[email protected]>
Cc: Marcelo Tosatti <[email protected]>
Cc: Xiongfeng Wang <[email protected]>
Cc: Yu Liao <[email protected]>
Cc: Phil Auld <[email protected]>
Cc: Paul Gortmaker<[email protected]>
Cc: Alex Belits <[email protected]>
Signed-off-by: Paul E. McKenney <[email protected]>
Reviewed-by: Nicolas Saenz Julienne <[email protected]>
Tested-by: Nicolas Saenz Julienne <[email protected]>

1 files changed, 13 insertions, 0 deletions

diff --git a/include/linux/context_tracking_state.h b/include/linux/context_tracking_state.h
index 5a8da2787287..13a4a9d1ec7e 100644
--- a/include/linux/context_tracking_state.h
+++ b/include/linux/context_tracking_state.h
@@ -27,6 +27,7 @@ struct context_tracking {
 #endif
 #ifdef CONFIG_CONTEXT_TRACKING_IDLE
 	atomic_t dynticks;		/* Even value for idle, else odd. */
+	long dynticks_nesting;		/* Track process nesting level. */
 #endif
 };
 
@@ -53,6 +54,18 @@ static __always_inline int ct_dynticks_cpu_acquire(int cpu)
 
 	return atomic_read_acquire(&ct->dynticks);
 }
+
+static __always_inline long ct_dynticks_nesting(void)
+{
+	return __this_cpu_read(context_tracking.dynticks_nesting);
+}
+
+static __always_inline long ct_dynticks_nesting_cpu(int cpu)
+{
+	struct context_tracking *ct = per_cpu_ptr(&context_tracking, cpu);
+
+	return ct->dynticks_nesting;
+}
 #endif /* #ifdef CONFIG_CONTEXT_TRACKING_IDLE */
 
 #ifdef CONFIG_CONTEXT_TRACKING_USER