[PATCH RFC 02/16] rcutorture: Add PRCU rcu_torture_ops

[lianglihao]

From: Lihao Liang <liangli...@huawei.com>

Reviewed-by: Heng Zhang <hen...@huawei.com>
Signed-off-by: Lihao Liang <liangli...@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