From c32e066057fe0914da262c94e52cefb142f965b4 Mon Sep 17 00:00:00 2001
From: "Paul E. McKenney" <paulmck@us.ibm.com>
Date: Tue, 27 Jun 2006 02:54:04 -0700
Subject: [PATCH] rcutorture: add call_rcu_bh() operations

Add operations for the call_rcu_bh() variant of RCU.  Also add an
rcu_batches_completed_bh() function, which is needed by rcutorture.

Signed-off-by: Paul E. McKenney <paulmck@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---
 kernel/rcutorture.c | 40 ++++++++++++++++++++++++++++++++++++++--
 1 file changed, 38 insertions(+), 2 deletions(-)

(limited to 'kernel/rcutorture.c')

diff --git a/kernel/rcutorture.c b/kernel/rcutorture.c
index c96b5edd6ed1..4d1c3d247127 100644
--- a/kernel/rcutorture.c
+++ b/kernel/rcutorture.c
@@ -66,7 +66,7 @@ MODULE_PARM_DESC(test_no_idle_hz, "Test support for tickless idle CPUs");
 module_param(shuffle_interval, int, 0);
 MODULE_PARM_DESC(shuffle_interval, "Number of seconds between shuffles");
 module_param(torture_type, charp, 0);
-MODULE_PARM_DESC(torture_type, "Type of RCU to torture (rcu)");
+MODULE_PARM_DESC(torture_type, "Type of RCU to torture (rcu, rcu_bh)");
 
 #define TORTURE_FLAG "-torture:"
 #define PRINTK_STRING(s) \
@@ -246,8 +246,44 @@ static struct rcu_torture_ops rcu_ops = {
 	.name = "rcu"
 };
 
+/*
+ * Definitions for rcu_bh torture testing.
+ */
+
+static int rcu_bh_torture_read_lock(void)
+{
+	rcu_read_lock_bh();
+	return 0;
+}
+
+static void rcu_bh_torture_read_unlock(int idx)
+{
+	rcu_read_unlock_bh();
+}
+
+static int rcu_bh_torture_completed(void)
+{
+	return rcu_batches_completed_bh();
+}
+
+static void rcu_bh_torture_deferred_free(struct rcu_torture *p)
+{
+	call_rcu_bh(&p->rtort_rcu, rcu_torture_cb);
+}
+
+static struct rcu_torture_ops rcu_bh_ops = {
+	.init = NULL,
+	.cleanup = NULL,
+	.readlock = rcu_bh_torture_read_lock,
+	.readunlock = rcu_bh_torture_read_unlock,
+	.completed = rcu_bh_torture_completed,
+	.deferredfree = rcu_bh_torture_deferred_free,
+	.stats = NULL,
+	.name = "rcu_bh"
+};
+
 static struct rcu_torture_ops *torture_ops[] =
-	{ &rcu_ops, NULL };
+	{ &rcu_ops, &rcu_bh_ops, NULL };
 
 /*
  * RCU torture writer kthread.  Repeatedly substitutes a new structure
-- 
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