rcu: Remove "cpu" argument to rcu_check_callbacks()

The "cpu" argument was kept around on the off-chance that RCU might
offload scheduler-clock interrupts.  However, this offload approach
has been replaced by NO_HZ_FULL, which offloads -all- RCU processing
from qualifying CPUs.  It is therefore time to remove the "cpu" argument
to rcu_check_callbacks(), which this commit does.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Pranith Kumar <bobby.prani@gmail.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
index ab6fcfb4fe11..3107811bba69 100644
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -2388,7 +2388,7 @@ static void rcu_do_batch(struct rcu_state *rsp, struct rcu_data *rdp)
  * invoked from the scheduling-clock interrupt.  If rcu_pending returns
  * false, there is no point in invoking rcu_check_callbacks().
  */
-void rcu_check_callbacks(int cpu, int user)
+void rcu_check_callbacks(int user)
 {
         trace_rcu_utilization(TPS("Start scheduler-tick"));
         increment_cpu_stall_ticks();
@@ -2420,8 +2420,8 @@ void rcu_check_callbacks(int cpu, int user)
 
                 rcu_bh_qs();
         }
-        rcu_preempt_check_callbacks(cpu);
-        if (rcu_pending(cpu))
+        rcu_preempt_check_callbacks(smp_processor_id());
+        if (rcu_pending(smp_processor_id()))
                 invoke_rcu_core();
         if (user)
                 rcu_note_voluntary_context_switch(current);