Commit 9b67122a authored by Iulia Manda's avatar Iulia Manda Committed by Paul E. McKenney
Browse files

rcu: Remove unused rcu_data structure field 



The ->preemptible field in rcu_data is only initialized in the function
rcu_init_percpu_data(), and never used.  This commit therefore removes
this field.

Signed-off-by: default avatarIulia Manda <iulia.manda21@gmail.com>
Reviewed-by: default avatarJosh Triplett <josh@joshtriplett.org>
Signed-off-by: default avatarPaul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: default avatarJosh Triplett <josh@joshtriplett.org>
parent 365187fb

kernel/rcu/tree.c

+2 −4
Original line number Diff line number Diff line
@@ -3180,7 +3180,7 @@ rcu_boot_init_percpu_data(int cpu, struct rcu_state *rsp) 
 * that this CPU cannot possibly have any RCU callbacks in flight yet.

 */

static void

rcu_init_percpu_data(int cpu, struct rcu_state *rsp, int preemptible)

rcu_init_percpu_data(int cpu, struct rcu_state *rsp)

{

	unsigned long flags;

	unsigned long mask;
@@ -3193,7 +3193,6 @@ rcu_init_percpu_data(int cpu, struct rcu_state *rsp, int preemptible) 
	/* Set up local state, ensuring consistent view of global state. */

	raw_spin_lock_irqsave(&rnp->lock, flags);

	rdp->beenonline = 1;	 /* We have now been online. */

	rdp->preemptible = preemptible;

	rdp->qlen_last_fqs_check = 0;

	rdp->n_force_qs_snap = rsp->n_force_qs;

	rdp->blimit = blimit;
@@ -3237,8 +3236,7 @@ static void rcu_prepare_cpu(int cpu) 
	struct rcu_state *rsp;



	for_each_rcu_flavor(rsp)

		rcu_init_percpu_data(cpu, rsp,

				     strcmp(rsp->name, "rcu_preempt") == 0);

		rcu_init_percpu_data(cpu, rsp);

}



/*

kernel/rcu/tree.h

+0 −1
Original line number Diff line number Diff line
@@ -252,7 +252,6 @@ struct rcu_data { 
	bool		passed_quiesce;	/* User-mode/idle loop etc. */

	bool		qs_pending;	/* Core waits for quiesc state. */

	bool		beenonline;	/* CPU online at least once. */

	bool		preemptible;	/* Preemptible RCU? */

	struct rcu_node *mynode;	/* This CPU's leaf of hierarchy */

	unsigned long grpmask;		/* Mask to apply to leaf qsmask. */

#ifdef CONFIG_RCU_CPU_STALL_INFO

CRA Git | Maintained and supported by SUSTech CRA and CCSE