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 2768ce6bf657bb51b71b23a96302e18bc44e279e..d203f82a380a03a63fabc43971a8d357b89330d6 100644 (file)
--- 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;
 }