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rcu: Remove unused rcu_data structure field

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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>
This commit is contained in:
Iulia Manda 2014-03-11 13:18:22 +02:00 committed by Paul E. McKenney
parent 365187fbc0
commit 9b67122ae3
2 changed files with 2 additions and 5 deletions
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6
kernel/rcu/tree.c
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@ -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. * that this CPU cannot possibly have any RCU callbacks in flight yet.
*/ */
static void 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 flags;
unsigned long mask; 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. */ /* Set up local state, ensuring consistent view of global state. */
raw_spin_lock_irqsave(&rnp->lock, flags); raw_spin_lock_irqsave(&rnp->lock, flags);
rdp->beenonline = 1; /* We have now been online. */ rdp->beenonline = 1; /* We have now been online. */
rdp->preemptible = preemptible;
rdp->qlen_last_fqs_check = 0; rdp->qlen_last_fqs_check = 0;
rdp->n_force_qs_snap = rsp->n_force_qs; rdp->n_force_qs_snap = rsp->n_force_qs;
rdp->blimit = blimit; rdp->blimit = blimit;
@ -3237,8 +3236,7 @@ static void rcu_prepare_cpu(int cpu)
struct rcu_state *rsp; struct rcu_state *rsp;
for_each_rcu_flavor(rsp) for_each_rcu_flavor(rsp)
rcu_init_percpu_data(cpu, rsp, rcu_init_percpu_data(cpu, rsp);
strcmp(rsp->name, "rcu_preempt") == 0);
} }
/* /*

1
kernel/rcu/tree.h
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@ -252,7 +252,6 @@ struct rcu_data {
bool passed_quiesce; /* User-mode/idle loop etc. */ bool passed_quiesce; /* User-mode/idle loop etc. */
bool qs_pending; /* Core waits for quiesc state. */ bool qs_pending; /* Core waits for quiesc state. */
bool beenonline; /* CPU online at least once. */ bool beenonline; /* CPU online at least once. */
bool preemptible; /* Preemptible RCU? */
struct rcu_node *mynode; /* This CPU's leaf of hierarchy */ struct rcu_node *mynode; /* This CPU's leaf of hierarchy */
unsigned long grpmask; /* Mask to apply to leaf qsmask. */ unsigned long grpmask; /* Mask to apply to leaf qsmask. */
#ifdef CONFIG_RCU_CPU_STALL_INFO #ifdef CONFIG_RCU_CPU_STALL_INFO