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Subject[PATCH RFC 02/16] rcutorture: Add PRCU rcu_torture_ops
Date
From: Lihao Liang <lianglihao@huawei.com>

Reviewed-by: Heng Zhang <heng.z@huawei.com>
Signed-off-by: Lihao Liang <lianglihao@huawei.com>
---
include/linux/rcupdate.h | 1 +
kernel/rcu/rcutorture.c | 40 +++++++++++++++++++++++++++++++++++++++-
2 files changed, 40 insertions(+), 1 deletion(-)

diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h
index e1e5d002..12df9709 100644
--- a/include/linux/rcupdate.h
+++ b/include/linux/rcupdate.h
@@ -84,6 +84,7 @@ enum rcutorture_type {
RCU_SCHED_FLAVOR,
RCU_TASKS_FLAVOR,
SRCU_FLAVOR,
+ PRCU_FLAVOR,
INVALID_RCU_FLAVOR
};

diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c
index ae6e574d..7d65bf0c 100644
--- a/kernel/rcu/rcutorture.c
+++ b/kernel/rcu/rcutorture.c
@@ -46,6 +46,7 @@
#include <linux/delay.h>
#include <linux/stat.h>
#include <linux/srcu.h>
+#include <linux/prcu.h>
#include <linux/slab.h>
#include <linux/trace_clock.h>
#include <asm/byteorder.h>
@@ -768,6 +769,43 @@ static bool __maybe_unused torturing_tasks(void)

#endif /* #else #ifdef CONFIG_TASKS_RCU */

+/*
+ * Definitions for prcu torture testing.
+ */
+
+static int prcu_torture_read_lock(void) __acquires(RCU)
+{
+ prcu_read_lock();
+ return 0;
+}
+
+static void prcu_torture_read_unlock(int idx) __releases(RCU)
+{
+ prcu_read_unlock();
+}
+
+static struct rcu_torture_ops prcu_ops = {
+ .ttype = PRCU_FLAVOR,
+ .init = rcu_sync_torture_init,
+ .readlock = prcu_torture_read_lock,
+ .read_delay = rcu_read_delay, /* just reuse rcu's version. */
+ .readunlock = prcu_torture_read_unlock,
+ .started = rcu_no_completed,
+ .completed = rcu_no_completed,
+ .deferred_free = NULL,
+ .sync = synchronize_prcu,
+ .exp_sync = synchronize_prcu,
+ .get_state = NULL,
+ .cond_sync = NULL,
+ .call = NULL,
+ .cb_barrier = NULL,
+ .fqs = NULL,
+ .stats = NULL,
+ .irq_capable = 1,
+ .can_boost = 0,
+ .name = "prcu"
+};
+
/*
* RCU torture priority-boost testing. Runs one real-time thread per
* CPU for moderate bursts, repeatedly registering RCU callbacks and
@@ -1764,7 +1802,7 @@ rcu_torture_init(void)
int firsterr = 0;
static struct rcu_torture_ops *torture_ops[] = {
&rcu_ops, &rcu_bh_ops, &rcu_busted_ops, &srcu_ops, &srcud_ops,
- &sched_ops, RCUTORTURE_TASKS_OPS
+ &sched_ops, &prcu_ops, RCUTORTURE_TASKS_OPS
};

if (!torture_init_begin(torture_type, verbose, &torture_runnable))
--
2.14.1.729.g59c0ea183
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