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: Iulia Manda <iulia.manda21@gmail.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>

2 files changed, 2 insertions, 5 deletions

diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
index b4688993e956..2cc39c781085 100644
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -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);
 }
 
 /*
diff --git a/kernel/rcu/tree.h b/kernel/rcu/tree.h
index 7b572c5c65e1..13766ad2f4ee 100644
--- a/kernel/rcu/tree.h
+++ b/kernel/rcu/tree.h
@@ -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