From: Paul E. McKenney <paulmck@kernel.org>
Date: Wed, 5 Nov 2025 20:32:16 +0000 (-0800)
Subject: rcutorture: Make srcu{,d}_torture_init() announce the SRCU type
X-Git-Tag: v6.19-rc1~182^2~2^2~2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=609460a6db2016d9098b4bf50b3871302f5cc6ef;p=thirdparty%2Fkernel%2Flinux.git

rcutorture: Make srcu{,d}_torture_init() announce the SRCU type

This commit causes rcutorture's srcu_torture_init() and
srcud_torture_init() functions to announce on the console log
which variant of SRCU is being tortured, for example: "torture:
srcud_torture_init fast SRCU".

[ paulmck: Apply feedback from kernel test robot. ]

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
---

diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c
index ad9fdb996a1c1..b619c740306b4 100644
--- a/kernel/rcu/rcutorture.c
+++ b/kernel/rcu/rcutorture.c
@@ -701,10 +701,18 @@ static struct rcu_torture_ops srcud_ops;
 static void srcu_torture_init(void)
 {
 	rcu_sync_torture_init();
-	if (reader_flavor & SRCU_READ_FLAVOR_FAST)
+	if (!reader_flavor || (reader_flavor & SRCU_READ_FLAVOR_NORMAL))
+		VERBOSE_TOROUT_STRING("srcu_torture_init normal SRCU");
+	if (reader_flavor & SRCU_READ_FLAVOR_NMI)
+		VERBOSE_TOROUT_STRING("srcu_torture_init NMI-safe SRCU");
+	if (reader_flavor & SRCU_READ_FLAVOR_FAST) {
 		srcu_ctlp = &srcu_ctlf;
-	if (reader_flavor & SRCU_READ_FLAVOR_FAST_UPDOWN)
+		VERBOSE_TOROUT_STRING("srcu_torture_init fast SRCU");
+	}
+	if (reader_flavor & SRCU_READ_FLAVOR_FAST_UPDOWN) {
 		srcu_ctlp = &srcu_ctlfud;
+		VERBOSE_TOROUT_STRING("srcu_torture_init fast-up/down SRCU");
+	}
 }
 
 static void srcu_get_gp_data(int *flags, unsigned long *gp_seq)
@@ -920,12 +928,21 @@ static struct rcu_torture_ops srcu_ops = {
 static void srcud_torture_init(void)
 {
 	rcu_sync_torture_init();
-	if (reader_flavor & SRCU_READ_FLAVOR_FAST_UPDOWN)
-		WARN_ON(init_srcu_struct_fast_updown(&srcu_ctld));
-	else if (reader_flavor & SRCU_READ_FLAVOR_FAST)
+	if (!reader_flavor || (reader_flavor & SRCU_READ_FLAVOR_NORMAL)) {
+		WARN_ON(init_srcu_struct(&srcu_ctld));
+		VERBOSE_TOROUT_STRING("srcud_torture_init normal SRCU");
+	} else if (reader_flavor & SRCU_READ_FLAVOR_NMI) {
+		WARN_ON(init_srcu_struct(&srcu_ctld));
+		VERBOSE_TOROUT_STRING("srcud_torture_init NMI-safe SRCU");
+	} else if (reader_flavor & SRCU_READ_FLAVOR_FAST) {
 		WARN_ON(init_srcu_struct_fast(&srcu_ctld));
-	else
+		VERBOSE_TOROUT_STRING("srcud_torture_init fast SRCU");
+	} else if (reader_flavor & SRCU_READ_FLAVOR_FAST_UPDOWN) {
+		WARN_ON(init_srcu_struct_fast_updown(&srcu_ctld));
+		VERBOSE_TOROUT_STRING("srcud_torture_init fast-up/down SRCU");
+	} else {
 		WARN_ON(init_srcu_struct(&srcu_ctld));
+	}
 	srcu_ctlp = &srcu_ctld;
 }