Commit-ID: aff4e9ede52badf550745c3d30ed5fcf86ed4351
Gitweb: https://git.kernel.org/tip/aff4e9ede52badf550745c3d30ed5fcf86ed4351
Author: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
AuthorDate: Tue, 3 Jul 2018 17:22:34 -0700
Committer: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
CommitDate: Thu, 30 Aug 2018 16:02:52 -0700
rcu: Remove rsp parameter from rcu_report_qs_rsp()
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_report_qs_rsp().
Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
---
kernel/rcu/tree.c | 16 ++++++++++------
1 file changed, 10 insertions(+), 6 deletions(-)
diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
index 919033d2c083..2665a45ccb43 100644
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -138,7 +138,7 @@ static void rcu_init_new_rnp(struct rcu_node *rnp_leaf);
static void rcu_cleanup_dead_rnp(struct rcu_node *rnp_leaf);
static void rcu_boost_kthread_setaffinity(struct rcu_node *rnp, int outgoingcpu);
static void invoke_rcu_core(void);
-static void invoke_rcu_callbacks(struct rcu_state *rsp, struct rcu_data *rdp);
+static void invoke_rcu_callbacks(struct rcu_data *rdp);
static void rcu_report_exp_rdp(struct rcu_state *rsp, struct rcu_data *rdp);
static void sync_sched_exp_online_cleanup(int cpu);
@@ -2189,9 +2189,11 @@ static int __noreturn rcu_gp_kthread(void *arg)
* just-completed grace period. Note that the caller must hold rnp->lock,
* which is released before return.
*/
-static void rcu_report_qs_rsp(struct rcu_state *rsp, unsigned long flags)
+static void rcu_report_qs_rsp(unsigned long flags)
__releases(rcu_get_root(rsp)->lock)
{
+ struct rcu_state *rsp = &rcu_state;
+
raw_lockdep_assert_held_rcu_node(rcu_get_root(rsp));
WARN_ON_ONCE(!rcu_gp_in_progress(rsp));
WRITE_ONCE(rsp->gp_flags, READ_ONCE(rsp->gp_flags) | RCU_GP_FLAG_FQS);
@@ -2268,7 +2270,7 @@ static void rcu_report_qs_rnp(unsigned long mask, struct rcu_node *rnp,
* state for this grace period. Invoke rcu_report_qs_rsp()
* to clean up and start the next grace period if one is needed.
*/
- rcu_report_qs_rsp(rsp, flags); /* releases rnp->lock. */
+ rcu_report_qs_rsp(flags); /* releases rnp->lock. */
}
/*
@@ -2302,7 +2304,7 @@ rcu_report_unblock_qs_rnp(struct rcu_state *rsp,
* Only one rcu_node structure in the tree, so don't
* try to report up to its nonexistent parent!
*/
- rcu_report_qs_rsp(rsp, flags);
+ rcu_report_qs_rsp(flags);
return;
}
@@ -2761,7 +2763,7 @@ __rcu_process_callbacks(struct rcu_state *rsp)
/* If there are callbacks ready, invoke them. */
if (rcu_segcblist_ready_cbs(&rdp->cblist))
- invoke_rcu_callbacks(rsp, rdp);
+ invoke_rcu_callbacks(rdp);
/* Do any needed deferred wakeups of rcuo kthreads. */
do_nocb_deferred_wakeup(rdp);
@@ -2789,8 +2791,10 @@ static __latent_entropy void rcu_process_callbacks(struct softirq_action *unused
* are running on the current CPU with softirqs disabled, the
* rcu_cpu_kthread_task cannot disappear out from under us.
*/
-static void invoke_rcu_callbacks(struct rcu_state *rsp, struct rcu_data *rdp)
+static void invoke_rcu_callbacks(struct rcu_data *rdp)
{
+ struct rcu_state *rsp = &rcu_state;
+
if (unlikely(!READ_ONCE(rcu_scheduler_fully_active)))
return;
if (likely(!rsp->boost)) {
|