futex: Mention key referencing differences between shared and private futexes

[cascardo/linux.git] / kernel / torture.c

diff --git a/kernel/torture.c b/kernel/torture.c
index ede8b25..dd70993 100644 (file)
--- a/kernel/torture.c
+++ b/kernel/torture.c
@@ -633,8 +633,13 @@ EXPORT_SYMBOL_GPL(torture_init_end);
  *
  * This must be called before the caller starts shutting down its own
  * kthreads.
+ *
+ * Both torture_cleanup_begin() and torture_cleanup_end() must be paired,
+ * in order to correctly perform the cleanup. They are separated because
+ * threads can still need to reference the torture_type type, thus nullify
+ * only after completing all other relevant calls.
  */
-bool torture_cleanup(void)
+bool torture_cleanup_begin(void)
 {
        mutex_lock(&fullstop_mutex);
        if (ACCESS_ONCE(fullstop) == FULLSTOP_SHUTDOWN) {
@@ -649,12 +654,17 @@ bool torture_cleanup(void)
        torture_shuffle_cleanup();
        torture_stutter_cleanup();
        torture_onoff_cleanup();
+       return false;
+}
+EXPORT_SYMBOL_GPL(torture_cleanup_begin);
+
+void torture_cleanup_end(void)
+{
        mutex_lock(&fullstop_mutex);
        torture_type = NULL;
        mutex_unlock(&fullstop_mutex);
-       return false;
 }
-EXPORT_SYMBOL_GPL(torture_cleanup);
+EXPORT_SYMBOL_GPL(torture_cleanup_end);
 
 /*
  * Is it time for the current torture test to stop?