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rcu: Remove "cpu" argument to rcu_check_callbacks()

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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has been replaced by NO_HZ_FULL, which offloads -all- RCU processing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 <[email protected]>
Reviewed-by: Pranith Kumar <[email protected]>
This commit is contained in:
Paul E. McKenney 2014-10-21 07:53:02 -07:00
commit c3377c2da6
4 changed files with 6 additions and 7 deletions
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2
kernel/rcu/tiny.c
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@ -247,7 +247,7 @@ void rcu_bh_qs(void)
* be called from hardirq context. It is normally called from the
* scheduling-clock interrupt.
*/
void rcu_check_callbacks(int cpu, int user)
void rcu_check_callbacks(int user)
{
RCU_TRACE(check_cpu_stalls());
if (user || rcu_is_cpu_rrupt_from_idle())

6
kernel/rcu/tree.c
View file

@ -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);