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authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>2012-07-16 10:42:38 +0000
committerThomas Gleixner <tglx@linutronix.de>2012-08-13 17:01:08 +0200
commit62ab7072476ae1600e877cc62b43758e485f4f1e (patch)
treec1df0992432cf5bae0f9122d606e73628368fb8e /kernel/rcutree.h
parentbcd951cf10f24e341defcd002c15a1f4eea13ddb (diff)
rcu: Use smp_hotplug_thread facility for RCUs per-CPU kthread
Bring RCU into the new-age CPU-hotplug fold by modifying RCU's per-CPU kthread code to use the new smp_hotplug_thread facility. [ tglx: Adapted it to use callbacks and to the simplified rcu yield ] Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Namhyung Kim <namhyung@kernel.org> Link: http://lkml.kernel.org/r/20120716103948.673354828@linutronix.de Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel/rcutree.h')
-rw-r--r--kernel/rcutree.h8
1 files changed, 0 insertions, 8 deletions
diff --git a/kernel/rcutree.h b/kernel/rcutree.h
index f08176172546..1224d4c05382 100644
--- a/kernel/rcutree.h
+++ b/kernel/rcutree.h
@@ -196,12 +196,6 @@ struct rcu_node {
/* Refused to boost: not sure why, though. */
/* This can happen due to race conditions. */
#endif /* #ifdef CONFIG_RCU_BOOST */
- struct task_struct *node_kthread_task;
- /* kthread that takes care of this rcu_node */
- /* structure, for example, awakening the */
- /* per-CPU kthreads as needed. */
- unsigned int node_kthread_status;
- /* State of node_kthread_task for tracing. */
} ____cacheline_internodealigned_in_smp;
/*
@@ -468,7 +462,6 @@ static int rcu_preempt_blocked_readers_cgp(struct rcu_node *rnp);
#ifdef CONFIG_HOTPLUG_CPU
static void rcu_report_unblock_qs_rnp(struct rcu_node *rnp,
unsigned long flags);
-static void rcu_stop_cpu_kthread(int cpu);
#endif /* #ifdef CONFIG_HOTPLUG_CPU */
static void rcu_print_detail_task_stall(struct rcu_state *rsp);
static int rcu_print_task_stall(struct rcu_node *rnp);
@@ -494,7 +487,6 @@ static void rcu_preempt_do_callbacks(void);
static int __cpuinit rcu_spawn_one_boost_kthread(struct rcu_state *rsp,
struct rcu_node *rnp);
#endif /* #ifdef CONFIG_RCU_BOOST */
-static void rcu_cpu_kthread_setrt(int cpu, int to_rt);
static void __cpuinit rcu_prepare_kthreads(int cpu);
static void rcu_prepare_for_idle_init(int cpu);
static void rcu_cleanup_after_idle(int cpu);