Commit b049fdf8 authored by Paul E. McKenney's avatar Paul E. McKenney
Browse files

rcu: Remove rsp parameter from __rcu_process_callbacks() 



There now is only one rcu_state structure in a given build of the
Linux kernel, so there is no need to pass it as a parameter to RCU's
functions.  This commit therefore removes the rsp parameter from
__rcu_process_callbacks(), and also inlines it into rcu_process_callbacks(),
removing the for_each_rcu_flavor() while in the neighborhood.

Signed-off-by: default avatarPaul E. McKenney <paulmck@linux.vnet.ibm.com>
parent b96f9dc4

kernel/rcu/tree.c

+7 −19
Original line number Diff line number Diff line
@@ -2741,17 +2741,19 @@ rcu_check_gp_start_stall(struct rcu_node *rnp, struct rcu_data *rdp) 
}



/*

 * This does the RCU core processing work for the specified rcu_state

 * and rcu_data structures.  This may be called only from the CPU to

 * whom the rdp belongs.

 * This does the RCU core processing work for the specified rcu_data

 * structures.  This may be called only from the CPU to whom the rdp

 * belongs.

 */

static void

__rcu_process_callbacks(struct rcu_state *rsp)

static __latent_entropy void rcu_process_callbacks(struct softirq_action *unused)

{

	unsigned long flags;

	struct rcu_data *rdp = raw_cpu_ptr(&rcu_data);

	struct rcu_node *rnp = rdp->mynode;



	if (cpu_is_offline(smp_processor_id()))

		return;

	trace_rcu_utilization(TPS("Start RCU core"));

	WARN_ON_ONCE(!rdp->beenonline);



	/* Report any deferred quiescent states if preemption enabled. */
@@ -2780,20 +2782,6 @@ __rcu_process_callbacks(struct rcu_state *rsp) 


	/* Do any needed deferred wakeups of rcuo kthreads. */

	do_nocb_deferred_wakeup(rdp);

}



/*

 * Do RCU core processing for the current CPU.

 */

static __latent_entropy void rcu_process_callbacks(struct softirq_action *unused)

{

	struct rcu_state *rsp;



	if (cpu_is_offline(smp_processor_id()))

		return;

	trace_rcu_utilization(TPS("Start RCU core"));

	for_each_rcu_flavor(rsp)

		__rcu_process_callbacks(rsp);

	trace_rcu_utilization(TPS("End RCU core"));

}