rcutorture: Abstract torture_stop_kthread()

Stopping of kthreads is not RCU-specific, so this commit abstracts
out torture_stop_kthread(), saving a few lines of code in the process.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>

1 files changed, 13 insertions, 0 deletions

diff --git a/kernel/torture.c b/kernel/torture.c
index 439451821a7f..871f63611f7f 100644
--- a/kernel/torture.c
+++ b/kernel/torture.c
@@ -700,3 +700,16 @@ int _torture_create_kthread(int (*fn)(void *arg), void *arg, char *s, char *m,
 	return ret;
 }
 EXPORT_SYMBOL_GPL(_torture_create_kthread);
+
+/*
+ * Stop a generic kthread, emitting a message.
+ */
+void _torture_stop_kthread(char *m, struct task_struct **tp)
+{
+	if (*tp == NULL)
+		return;
+	VERBOSE_TOROUT_STRING(m);
+	kthread_stop(*tp);
+	*tp = NULL;
+}
+EXPORT_SYMBOL_GPL(_torture_stop_kthread);