Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 915e8a4f authored by Alexander Gordeev's avatar Alexander Gordeev Committed by Paul E. McKenney
Browse files

rcu: Remove fastpath from __rcu_process_callbacks() 



The standard code path accommodates a condition when no
RCU callbacks are ready to invoke. Since size of the code
is a priority for tiny RCU, remove the fast path.

Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Signed-off-by: default avatarAlexander Gordeev <agordeev@redhat.com>
Signed-off-by: default avatarPaul E. McKenney <paulmck@linux.vnet.ibm.com>
parent 27153acb

kernel/rcu/tiny.c

+0 −11
Original line number Diff line number Diff line
@@ -168,17 +168,6 @@ static void __rcu_process_callbacks(struct rcu_ctrlblk *rcp) 
	unsigned long flags;

	RCU_TRACE(int cb_count = 0);



	/* If no RCU callbacks ready to invoke, just return. */

	if (&rcp->rcucblist == rcp->donetail) {

		RCU_TRACE(trace_rcu_batch_start(rcp->name, 0, 0, -1));

		RCU_TRACE(trace_rcu_batch_end(rcp->name, 0,

					      !!ACCESS_ONCE(rcp->rcucblist),

					      need_resched(),

					      is_idle_task(current),

					      false));

		return;

	}



	/* Move the ready-to-invoke callbacks to a local list. */

	local_irq_save(flags);

	RCU_TRACE(trace_rcu_batch_start(rcp->name, 0, rcp->qlen, -1));