[PATCH v2 RFC tip/core/rcu 3/4] rcu: Update from rcu_expedited variable to rcu_gp_is_expedited()

[Paul E. McKenney]

From: "Paul E. McKenney" <paul...@linux.vnet.ibm.com>

This commit updates open-coded tests of the rcu_expedited variable
to instead use rcu_gp_is_expedited().

Signed-off-by: Paul E. McKenney <paul...@linux.vnet.ibm.com>
---
 kernel/rcu/srcu.c        | 2 +-
 kernel/rcu/tree.c        | 9 +++++----
 kernel/rcu/tree_plugin.h | 2 +-
 3 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/kernel/rcu/srcu.c b/kernel/rcu/srcu.c
index 81f53b504c18..cad76e76b4e7 100644
--- a/kernel/rcu/srcu.c
+++ b/kernel/rcu/srcu.c
@@ -490,7 +490,7 @@ static void __synchronize_srcu(struct srcu_struct *sp, int 
trycount)
  */
 void synchronize_srcu(struct srcu_struct *sp)
 {
-       __synchronize_srcu(sp, rcu_expedited
+       __synchronize_srcu(sp, rcu_gp_is_expedited()
                           ? SYNCHRONIZE_SRCU_EXP_TRYCOUNT
                           : SYNCHRONIZE_SRCU_TRYCOUNT);
 }
diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
index 715e7bb35852..5fb9888af6d5 100644
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -3064,7 +3064,7 @@ void synchronize_sched(void)
                           "Illegal synchronize_sched() in RCU-sched read-side 
critical section");
        if (rcu_blocking_is_gp())
                return;
-       if (rcu_expedited)
+       if (rcu_gp_is_expedited())
                synchronize_sched_expedited();
        else
                wait_rcu_gp(call_rcu_sched);
@@ -3091,7 +3091,7 @@ void synchronize_rcu_bh(void)
                           "Illegal synchronize_rcu_bh() in RCU-bh read-side 
critical section");
        if (rcu_blocking_is_gp())
                return;
-       if (rcu_expedited)
+       if (rcu_gp_is_expedited())
                synchronize_rcu_bh_expedited();
        else
                wait_rcu_gp(call_rcu_bh);
@@ -3783,11 +3783,12 @@ static int rcu_pm_notify(struct notifier_block *self,
        case PM_HIBERNATION_PREPARE:
        case PM_SUSPEND_PREPARE:
                if (nr_cpu_ids <= 256) /* Expediting bad for large systems. */
-                       rcu_expedited = 1;
+                       rcu_expedite_gp();
                break;
        case PM_POST_HIBERNATION:
        case PM_POST_SUSPEND:
-               rcu_expedited = 0;
+               if (nr_cpu_ids <= 256) /* Expediting bad for large systems. */
+                       rcu_unexpedite_gp();
                break;
        default:
                break;
diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h
index 65629cc3c6cf..d11612ff3daa 100644
--- a/kernel/rcu/tree_plugin.h
+++ b/kernel/rcu/tree_plugin.h
@@ -572,7 +572,7 @@ void synchronize_rcu(void)
                           "Illegal synchronize_rcu() in RCU read-side critical 
section");
        if (!rcu_scheduler_active)
                return;
-       if (rcu_expedited)
+       if (rcu_gp_is_expedited())
                synchronize_rcu_expedited();
        else
                wait_rcu_gp(call_rcu);
-- 
1.8.1.5

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/