Commit-ID: 1bca8cf1a2c3c6683b12ad28a3e826ca7a834978
Gitweb: http://git.kernel.org/tip/1bca8cf1a2c3c6683b12ad28a3e826ca7a834978
Author: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
AuthorDate: Tue, 12 Jun 2012 09:40:38 -0700
Committer: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
CommitDate: Mon, 2 Jul 2012 12:33:23 -0700
rcu: Remove unneeded __rcu_process_callbacks() argument
With the advent of __this_cpu_ptr(), it is no longer necessary to pass
both the rcu_state and rcu_data structures into __rcu_process_callbacks().
This commit therefore computes the rcu_data pointer from the rcu_state
pointer within __rcu_process_callbacks() so that callers can pass in
only the pointer to the rcu_state structure. This paves the way for
linking the rcu_state structures together and iterating over them.
Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
Reviewed-by: Josh Triplett <josh@xxxxxxxxxxxxxxxx>
---
kernel/rcutree.c | 8 ++++----
kernel/rcutree_plugin.h | 3 +--
2 files changed, 5 insertions(+), 6 deletions(-)
diff --git a/kernel/rcutree.c b/kernel/rcutree.c
index dda43d8..5376a15 100644
--- a/kernel/rcutree.c
+++ b/kernel/rcutree.c
@@ -1788,9 +1788,10 @@ unlock_fqs_ret:
* whom the rdp belongs.
*/
static void
-__rcu_process_callbacks(struct rcu_state *rsp, struct rcu_data *rdp)
+__rcu_process_callbacks(struct rcu_state *rsp)
{
unsigned long flags;
+ struct rcu_data *rdp = __this_cpu_ptr(rsp->rda);
WARN_ON_ONCE(rdp->beenonline == 0);
@@ -1827,9 +1828,8 @@ __rcu_process_callbacks(struct rcu_state *rsp, struct rcu_data *rdp)
static void rcu_process_callbacks(struct softirq_action *unused)
{
trace_rcu_utilization("Start RCU core");
- __rcu_process_callbacks(&rcu_sched_state,
- &__get_cpu_var(rcu_sched_data));
- __rcu_process_callbacks(&rcu_bh_state, &__get_cpu_var(rcu_bh_data));
+ __rcu_process_callbacks(&rcu_sched_state);
+ __rcu_process_callbacks(&rcu_bh_state);
rcu_preempt_process_callbacks();
trace_rcu_utilization("End RCU core");
}
diff --git a/kernel/rcutree_plugin.h b/kernel/rcutree_plugin.h
index 9cb3a68..5a80cdd 100644
--- a/kernel/rcutree_plugin.h
+++ b/kernel/rcutree_plugin.h
@@ -687,8 +687,7 @@ static void rcu_preempt_check_callbacks(int cpu)
*/
static void rcu_preempt_process_callbacks(void)
{
- __rcu_process_callbacks(&rcu_preempt_state,
- &__get_cpu_var(rcu_preempt_data));
+ __rcu_process_callbacks(&rcu_preempt_state);
}
#ifdef CONFIG_RCU_BOOST
--
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