sanitize <linux/prefetch.h> usage

[pandora-kernel.git] / kernel / rcutiny.c

diff --git a/kernel/rcutiny.c b/kernel/rcutiny.c
index 0c343b9..7bbac7d 100644 (file)
--- a/kernel/rcutiny.c
+++ b/kernel/rcutiny.c
@@ -35,15 +35,16 @@
 #include <linux/init.h>
 #include <linux/time.h>
 #include <linux/cpu.h>
+#include <linux/prefetch.h>
 
 /* Controls for rcu_kthread() kthread, replacing RCU_SOFTIRQ used previously. */
 static struct task_struct *rcu_kthread_task;
 static DECLARE_WAIT_QUEUE_HEAD(rcu_kthread_wq);
 static unsigned long have_rcu_kthread_work;
-static void invoke_rcu_kthread(void);
 
 /* Forward declarations for rcutiny_plugin.h. */
 struct rcu_ctrlblk;
+static void invoke_rcu_kthread(void);
 static void rcu_process_callbacks(struct rcu_ctrlblk *rcp);
 static int rcu_kthread(void *arg);
 static void __call_rcu(struct rcu_head *head,
@@ -79,26 +80,31 @@ void rcu_exit_nohz(void)
 #endif /* #ifdef CONFIG_NO_HZ */
 
 /*
- * Helper function for rcu_qsctr_inc() and rcu_bh_qsctr_inc().
- * Also disable irqs to avoid confusion due to interrupt handlers
+ * Helper function for rcu_sched_qs() and rcu_bh_qs().
+ * Also irqs are disabled to avoid confusion due to interrupt handlers
  * invoking call_rcu().
  */
 static int rcu_qsctr_help(struct rcu_ctrlblk *rcp)
 {
-       unsigned long flags;
-
-       local_irq_save(flags);
        if (rcp->rcucblist != NULL &&
            rcp->donetail != rcp->curtail) {
                rcp->donetail = rcp->curtail;
-               local_irq_restore(flags);
                return 1;
        }
-       local_irq_restore(flags);
 
        return 0;
 }
 
+/*
+ * Wake up rcu_kthread() to process callbacks now eligible for invocation
+ * or to boost readers.
+ */
+static void invoke_rcu_kthread(void)
+{
+       have_rcu_kthread_work = 1;
+       wake_up(&rcu_kthread_wq);
+}
+
 /*
  * Record an rcu quiescent state.  And an rcu_bh quiescent state while we
  * are at it, given that any rcu quiescent state is also an rcu_bh
@@ -106,9 +112,13 @@ static int rcu_qsctr_help(struct rcu_ctrlblk *rcp)
  */
 void rcu_sched_qs(int cpu)
 {
+       unsigned long flags;
+
+       local_irq_save(flags);
        if (rcu_qsctr_help(&rcu_sched_ctrlblk) +
            rcu_qsctr_help(&rcu_bh_ctrlblk))
                invoke_rcu_kthread();
+       local_irq_restore(flags);
 }
 
 /*
@@ -116,8 +126,12 @@ void rcu_sched_qs(int cpu)
  */
 void rcu_bh_qs(int cpu)
 {
+       unsigned long flags;
+
+       local_irq_save(flags);
        if (rcu_qsctr_help(&rcu_bh_ctrlblk))
                invoke_rcu_kthread();
+       local_irq_restore(flags);
 }
 
 /*
@@ -167,7 +181,7 @@ static void rcu_process_callbacks(struct rcu_ctrlblk *rcp)
                prefetch(next);
                debug_rcu_head_unqueue(list);
                local_bh_disable();
-               list->func(list);
+               __rcu_reclaim(list);
                local_bh_enable();
                list = next;
                RCU_TRACE(cb_count++);
@@ -207,20 +221,6 @@ static int rcu_kthread(void *arg)
        return 0;  /* Not reached, but needed to shut gcc up. */
 }
 
-/*
- * Wake up rcu_kthread() to process callbacks now eligible for invocation
- * or to boost readers.
- */
-static void invoke_rcu_kthread(void)
-{
-       unsigned long flags;
-
-       local_irq_save(flags);
-       have_rcu_kthread_work = 1;
-       wake_up(&rcu_kthread_wq);
-       local_irq_restore(flags);
-}
-
 /*
  * Wait for a grace period to elapse.  But it is illegal to invoke
  * synchronize_sched() from within an RCU read-side critical section.