Merge commit 'fixes.2015.02.23a' into core/rcu

[cascardo/linux.git] / kernel / rcu / tree_plugin.h

diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h
index 43e9b4a..efdf7b6 100644 (file)
--- a/kernel/rcu/tree_plugin.h
+++ b/kernel/rcu/tree_plugin.h
@@ -1810,9 +1810,9 @@ early_param("rcu_nocb_poll", parse_rcu_nocb_poll);
  * Wake up any no-CBs CPUs' kthreads that were waiting on the just-ended
  * grace period.
  */
-static void rcu_nocb_gp_cleanup(struct rcu_state *rsp, struct rcu_node *rnp)
+static void rcu_nocb_gp_cleanup(struct swait_queue_head *sq)
 {
-       wake_up_all(&rnp->nocb_gp_wq[rnp->completed & 0x1]);
+       swake_up_all(sq);
 }
 
 /*
@@ -1828,10 +1828,15 @@ static void rcu_nocb_gp_set(struct rcu_node *rnp, int nrq)
        rnp->need_future_gp[(rnp->completed + 1) & 0x1] += nrq;
 }
 
+static struct swait_queue_head *rcu_nocb_gp_get(struct rcu_node *rnp)
+{
+       return &rnp->nocb_gp_wq[rnp->completed & 0x1];
+}
+
 static void rcu_init_one_nocb(struct rcu_node *rnp)
 {
-       init_waitqueue_head(&rnp->nocb_gp_wq[0]);
-       init_waitqueue_head(&rnp->nocb_gp_wq[1]);
+       init_swait_queue_head(&rnp->nocb_gp_wq[0]);
+       init_swait_queue_head(&rnp->nocb_gp_wq[1]);
 }
 
 #ifndef CONFIG_RCU_NOCB_CPU_ALL
@@ -1856,7 +1861,7 @@ static void wake_nocb_leader(struct rcu_data *rdp, bool force)
        if (READ_ONCE(rdp_leader->nocb_leader_sleep) || force) {
                /* Prior smp_mb__after_atomic() orders against prior enqueue. */
                WRITE_ONCE(rdp_leader->nocb_leader_sleep, false);
-               wake_up(&rdp_leader->nocb_wq);
+               swake_up(&rdp_leader->nocb_wq);
        }
 }
 
@@ -2068,7 +2073,7 @@ static void rcu_nocb_wait_gp(struct rcu_data *rdp)
         */
        trace_rcu_future_gp(rnp, rdp, c, TPS("StartWait"));
        for (;;) {
-               wait_event_interruptible(
+               swait_event_interruptible(
                        rnp->nocb_gp_wq[c & 0x1],
                        (d = ULONG_CMP_GE(READ_ONCE(rnp->completed), c)));
                if (likely(d))
@@ -2096,7 +2101,7 @@ wait_again:
        /* Wait for callbacks to appear. */
        if (!rcu_nocb_poll) {
                trace_rcu_nocb_wake(my_rdp->rsp->name, my_rdp->cpu, "Sleep");
-               wait_event_interruptible(my_rdp->nocb_wq,
+               swait_event_interruptible(my_rdp->nocb_wq,
                                !READ_ONCE(my_rdp->nocb_leader_sleep));
                /* Memory barrier handled by smp_mb() calls below and repoll. */
        } else if (firsttime) {
@@ -2171,7 +2176,7 @@ wait_again:
                         * List was empty, wake up the follower.
                         * Memory barriers supplied by atomic_long_add().
                         */
-                       wake_up(&rdp->nocb_wq);
+                       swake_up(&rdp->nocb_wq);
                }
        }
 
@@ -2192,7 +2197,7 @@ static void nocb_follower_wait(struct rcu_data *rdp)
                if (!rcu_nocb_poll) {
                        trace_rcu_nocb_wake(rdp->rsp->name, rdp->cpu,
                                            "FollowerSleep");
-                       wait_event_interruptible(rdp->nocb_wq,
+                       swait_event_interruptible(rdp->nocb_wq,
                                                 READ_ONCE(rdp->nocb_follower_head));
                } else if (firsttime) {
                        /* Don't drown trace log with "Poll"! */
@@ -2351,7 +2356,7 @@ void __init rcu_init_nohz(void)
 static void __init rcu_boot_init_nocb_percpu_data(struct rcu_data *rdp)
 {
        rdp->nocb_tail = &rdp->nocb_head;
-       init_waitqueue_head(&rdp->nocb_wq);
+       init_swait_queue_head(&rdp->nocb_wq);
        rdp->nocb_follower_tail = &rdp->nocb_follower_head;
 }
 
@@ -2501,7 +2506,7 @@ static bool rcu_nocb_cpu_needs_barrier(struct rcu_state *rsp, int cpu)
        return false;
 }
 
-static void rcu_nocb_gp_cleanup(struct rcu_state *rsp, struct rcu_node *rnp)
+static void rcu_nocb_gp_cleanup(struct swait_queue_head *sq)
 {
 }
 
@@ -2509,6 +2514,11 @@ static void rcu_nocb_gp_set(struct rcu_node *rnp, int nrq)
 {
 }
 
+static struct swait_queue_head *rcu_nocb_gp_get(struct rcu_node *rnp)
+{
+       return NULL;
+}
+
 static void rcu_init_one_nocb(struct rcu_node *rnp)
 {
 }