sysctl: suppress kmemleak messages

[karo-tx-linux.git] / kernel / rcutiny_plugin.h

diff --git a/kernel/rcutiny_plugin.h b/kernel/rcutiny_plugin.h
index fc31a2d651005dd6a912bd3487795975e33740e3..918fd1e8509c9d5589d9ff75d0f63bca0b27cc32 100644 (file)
--- a/kernel/rcutiny_plugin.h
+++ b/kernel/rcutiny_plugin.h
@@ -132,7 +132,6 @@ static struct rcu_preempt_ctrlblk rcu_preempt_ctrlblk = {
        RCU_TRACE(.rcb.name = "rcu_preempt")
 };
 
-static void rcu_read_unlock_special(struct task_struct *t);
 static int rcu_preempted_readers_exp(void);
 static void rcu_report_exp_done(void);
 
@@ -351,8 +350,9 @@ static int rcu_initiate_boost(void)
                        rcu_preempt_ctrlblk.boost_tasks =
                                rcu_preempt_ctrlblk.gp_tasks;
                invoke_rcu_callbacks();
-       } else
+       } else {
                RCU_TRACE(rcu_initiate_boost_trace());
+       }
        return 1;
 }
 
@@ -526,24 +526,12 @@ void rcu_preempt_note_context_switch(void)
        local_irq_restore(flags);
 }
 
-/*
- * Tiny-preemptible RCU implementation for rcu_read_lock().
- * Just increment ->rcu_read_lock_nesting, shared state will be updated
- * if we block.
- */
-void __rcu_read_lock(void)
-{
-       current->rcu_read_lock_nesting++;
-       barrier();  /* needed if we ever invoke rcu_read_lock in rcutiny.c */
-}
-EXPORT_SYMBOL_GPL(__rcu_read_lock);
-
 /*
  * Handle special cases during rcu_read_unlock(), such as needing to
  * notify RCU core processing or task having blocked during the RCU
  * read-side critical section.
  */
-static noinline void rcu_read_unlock_special(struct task_struct *t)
+void rcu_read_unlock_special(struct task_struct *t)
 {
        int empty;
        int empty_exp;
@@ -626,38 +614,6 @@ static noinline void rcu_read_unlock_special(struct task_struct *t)
        local_irq_restore(flags);
 }
 
-/*
- * Tiny-preemptible RCU implementation for rcu_read_unlock().
- * Decrement ->rcu_read_lock_nesting.  If the result is zero (outermost
- * rcu_read_unlock()) and ->rcu_read_unlock_special is non-zero, then
- * invoke rcu_read_unlock_special() to clean up after a context switch
- * in an RCU read-side critical section and other special cases.
- */
-void __rcu_read_unlock(void)
-{
-       struct task_struct *t = current;
-
-       barrier();  /* needed if we ever invoke rcu_read_unlock in rcutiny.c */
-       if (t->rcu_read_lock_nesting != 1)
-               --t->rcu_read_lock_nesting;
-       else {
-               t->rcu_read_lock_nesting = INT_MIN;
-               barrier();  /* assign before ->rcu_read_unlock_special load */
-               if (unlikely(ACCESS_ONCE(t->rcu_read_unlock_special)))
-                       rcu_read_unlock_special(t);
-               barrier();  /* ->rcu_read_unlock_special load before assign */
-               t->rcu_read_lock_nesting = 0;
-       }
-#ifdef CONFIG_PROVE_LOCKING
-       {
-               int rrln = ACCESS_ONCE(t->rcu_read_lock_nesting);
-
-               WARN_ON_ONCE(rrln < 0 && rrln > INT_MIN / 2);
-       }
-#endif /* #ifdef CONFIG_PROVE_LOCKING */
-}
-EXPORT_SYMBOL_GPL(__rcu_read_unlock);
-
 /*
  * Check for a quiescent state from the current CPU.  When a task blocks,
  * the task is recorded in the rcu_preempt_ctrlblk structure, which is
@@ -823,9 +779,9 @@ void synchronize_rcu_expedited(void)
                rpcp->exp_tasks = NULL;
 
        /* Wait for tail of ->blkd_tasks list to drain. */
-       if (!rcu_preempted_readers_exp())
+       if (!rcu_preempted_readers_exp()) {
                local_irq_restore(flags);
-       else {
+       } else {
                rcu_initiate_boost();
                local_irq_restore(flags);
                wait_event(sync_rcu_preempt_exp_wq,
@@ -846,8 +802,6 @@ EXPORT_SYMBOL_GPL(synchronize_rcu_expedited);
  */
 int rcu_preempt_needs_cpu(void)
 {
-       if (!rcu_preempt_running_reader())
-               rcu_preempt_cpu_qs();
        return rcu_preempt_ctrlblk.rcb.rcucblist != NULL;
 }