From: Paul E. McKenney <paulmck@kernel.org>
Date: Tue, 19 May 2020 22:02:02 +0000 (-0700)
Subject: rcu: Remove initialized but unused rnp from check_slow_task()
X-Git-Tag: v5.9-rc1~204^2^2^2~9
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=55fbe86ef303bc8ab040e579fba34a750c08200e;p=thirdparty%2Fkernel%2Flinux.git

rcu: Remove initialized but unused rnp from check_slow_task()

This commit removes the variable rnp from check_slow_task(), which
is defined, assigned to, but not otherwise used.

Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
---

diff --git a/kernel/rcu/tree_stall.h b/kernel/rcu/tree_stall.h
index 2768ce6bf657b..d203f82a380a0 100644
--- a/kernel/rcu/tree_stall.h
+++ b/kernel/rcu/tree_stall.h
@@ -237,14 +237,12 @@ struct rcu_stall_chk_rdr {
  */
 static bool check_slow_task(struct task_struct *t, void *arg)
 {
-	struct rcu_node *rnp;
 	struct rcu_stall_chk_rdr *rscrp = arg;
 
 	if (task_curr(t))
 		return false; // It is running, so decline to inspect it.
 	rscrp->nesting = t->rcu_read_lock_nesting;
 	rscrp->rs = t->rcu_read_unlock_special;
-	rnp = t->rcu_blocked_node;
 	rscrp->on_blkd_list = !list_empty(&t->rcu_node_entry);
 	return true;
 }