rcu: Remove rsp parameter from rcu_print_detail_task_stall()

There now is only one rcu_state structure in a given build of the
Linux kernel, so there is no need to pass it as a parameter to RCU's
functions.  This commit therefore removes the rsp parameter from
rcu_print_detail_task_stall().

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>

diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
index 0b27453..130ce5e 100644 (file)
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -1360,7 +1360,7 @@ static void print_other_cpu_stall(unsigned long gp_seq)
                rcu_dump_cpu_stacks();
 
                /* Complain about tasks blocking the grace period. */
-               rcu_print_detail_task_stall(rsp);
+               rcu_print_detail_task_stall();
        } else {
                if (rcu_seq_current(&rsp->gp_seq) != gp_seq) {
                        pr_err("INFO: Stall ended before state dump start\n");

diff --git a/kernel/rcu/tree.h b/kernel/rcu/tree.h
index d60304f..00d268c 100644 (file)
--- a/kernel/rcu/tree.h
+++ b/kernel/rcu/tree.h
@@ -452,7 +452,7 @@ static int rcu_preempt_blocked_readers_cgp(struct rcu_node *rnp);
 #ifdef CONFIG_HOTPLUG_CPU
 static bool rcu_preempt_has_tasks(struct rcu_node *rnp);
 #endif /* #ifdef CONFIG_HOTPLUG_CPU */
-static void rcu_print_detail_task_stall(struct rcu_state *rsp);
+static void rcu_print_detail_task_stall(void);
 static int rcu_print_task_stall(struct rcu_node *rnp);
 static int rcu_print_task_exp_stall(struct rcu_node *rnp);
 static void rcu_preempt_check_blocked_tasks(struct rcu_state *rsp,

diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h
index c678c76..1d8148b 100644 (file)
--- a/kernel/rcu/tree_plugin.h
+++ b/kernel/rcu/tree_plugin.h
@@ -683,12 +683,12 @@ static void rcu_print_detail_task_stall_rnp(struct rcu_node *rnp)
  * Dump detailed information for all tasks blocking the current RCU
  * grace period.
  */
-static void rcu_print_detail_task_stall(struct rcu_state *rsp)
+static void rcu_print_detail_task_stall(void)
 {
        struct rcu_node *rnp = rcu_get_root();
 
        rcu_print_detail_task_stall_rnp(rnp);
-       rcu_for_each_leaf_node(rsp, rnp)
+       rcu_for_each_leaf_node(&rcu_state, rnp)
                rcu_print_detail_task_stall_rnp(rnp);
 }
 
@@ -1005,7 +1005,7 @@ static void rcu_preempt_deferred_qs(struct task_struct *t) { }
  * Because preemptible RCU does not exist, we never have to check for
  * tasks blocked within RCU read-side critical sections.
  */
-static void rcu_print_detail_task_stall(struct rcu_state *rsp)
+static void rcu_print_detail_task_stall(void)
 {
 }