rcutorture: Abstract function and module names

This commit moves to __func__ for function names and for KBUILD_MODNAME
for module names, all in the name of better resilience to change.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>

kernel/rcu/rcutorture.c

@@ -924,19 +924,19 @@ rcu_torture_writer(void *arg)
 	if (gp_cond1 && cur_ops->get_state && cur_ops->cond_sync)
 		synctype[nsynctypes++] = RTWS_COND_GET;
 	else if (gp_cond && (!cur_ops->get_state || !cur_ops->cond_sync))
-		pr_alert("rcu_torture_writer: gp_cond without primitives.\n");
+		pr_alert("%s: gp_cond without primitives.\n", __func__);
 	if (gp_exp1 && cur_ops->exp_sync)
 		synctype[nsynctypes++] = RTWS_EXP_SYNC;
 	else if (gp_exp && !cur_ops->exp_sync)
-		pr_alert("rcu_torture_writer: gp_exp without primitives.\n");
+		pr_alert("%s: gp_exp without primitives.\n", __func__);
 	if (gp_normal1 && cur_ops->deferred_free)
 		synctype[nsynctypes++] = RTWS_DEF_FREE;
 	else if (gp_normal && !cur_ops->deferred_free)
-		pr_alert("rcu_torture_writer: gp_normal without primitives.\n");
+		pr_alert("%s: gp_normal without primitives.\n", __func__);
 	if (gp_sync1 && cur_ops->sync)
 		synctype[nsynctypes++] = RTWS_SYNC;
 	else if (gp_sync && !cur_ops->sync)
-		pr_alert("rcu_torture_writer: gp_sync without primitives.\n");
+		pr_alert("%s: gp_sync without primitives.\n", __func__);
 	if (WARN_ONCE(nsynctypes == 0,
 		      "rcu_torture_writer: No update-side primitives.\n")) {
 		/*
@@ -1673,7 +1673,7 @@ static void rcu_torture_err_cb(struct rcu_head *rhp)
 	 * next grace period.  Unlikely, but can happen.  If it
 	 * does happen, the debug-objects subsystem won't have splatted.
 	 */
-	pr_alert("rcutorture: duplicated callback was invoked.\n");
+	pr_alert("%s: duplicated callback was invoked.\n", KBUILD_MODNAME);
 }
 #endif /* #ifdef CONFIG_DEBUG_OBJECTS_RCU_HEAD */
 
@@ -1690,7 +1690,7 @@ static void rcu_test_debug_objects(void)
 
 	init_rcu_head_on_stack(&rh1);
 	init_rcu_head_on_stack(&rh2);
-	pr_alert("rcutorture: WARN: Duplicate call_rcu() test starting.\n");
+	pr_alert("%s: WARN: Duplicate call_rcu() test starting.\n", KBUILD_MODNAME);
 
 	/* Try to queue the rh2 pair of callbacks for the same grace period. */
 	preempt_disable(); /* Prevent preemption from interrupting test. */
@@ -1705,11 +1705,11 @@ static void rcu_test_debug_objects(void)
 
 	/* Wait for them all to get done so we can safely return. */
 	rcu_barrier();
-	pr_alert("rcutorture: WARN: Duplicate call_rcu() test complete.\n");
+	pr_alert("%s: WARN: Duplicate call_rcu() test complete.\n", KBUILD_MODNAME);
 	destroy_rcu_head_on_stack(&rh1);
 	destroy_rcu_head_on_stack(&rh2);
 #else /* #ifdef CONFIG_DEBUG_OBJECTS_RCU_HEAD */
-	pr_alert("rcutorture: !CONFIG_DEBUG_OBJECTS_RCU_HEAD, not testing duplicate call_rcu()\n");
+	pr_alert("%s: !CONFIG_DEBUG_OBJECTS_RCU_HEAD, not testing duplicate call_rcu()\n", KBUILD_MODNAME);
 #endif /* #else #ifdef CONFIG_DEBUG_OBJECTS_RCU_HEAD */
 }