rcu: Remove unused but set variable

PATCH New Tobias Klauser 1 participant 1 message Oct 17, 2016 RCU

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Tobias Klauser

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2016-10-17 09:18 UTC #0 lore raw

PATCH 1/1 rcu: Remove unused but set variable

Since commit 7ec99de36f40 ("rcu: Provide exact CPU-online tracking for RCU"), the variable mask in rcu_init_percpu_data is set but no longer used. Remove it to fix the following warning when building with 'W=1':

kernel/rcu/tree.c: In function ‘rcu_init_percpu_data’:
kernel/rcu/tree.c:3765:16: warning: variable ‘mask’ set but not used [-Wunused-but-set-variable]

Signed-off-by Tobias Klauser <[email protected]>

---
 kernel/rcu/tree.c | 2 --
 1 file changed, 2 deletions(-)

kernel/rcu/tree.c +0 -2

index 96c52e43f7ca..65042f4ba569 100644
@@ -3762,7 +3762,6 @@ static void
 rcu_init_percpu_data(int cpu, struct rcu_state *rsp)
 {
 	unsigned long flags;
-	unsigned long mask;
 	struct rcu_data *rdp = per_cpu_ptr(rsp->rda, cpu);
 	struct rcu_node *rnp = rcu_get_root(rsp);

@@ -3785,7 +3784,6 @@ rcu_init_percpu_data(int cpu, struct rcu_state *rsp)
 	 * of the next grace period.
 	 */
 	rnp = rdp->mynode;
-	mask = rdp->grpmask;
 	raw_spin_lock_rcu_node(rnp);		/* irqs already disabled. */
 	if (!rdp->beenonline)
 		WRITE_ONCE(rsp->ncpus, READ_ONCE(rsp->ncpus) + 1);

Signature · 1 line

2.9.0