selftests/bpf: Add a test for objects stuck in free_by_rcu_ttracegrafted

Delete all elements of BPF_F_NO_PREALLOC hash map in one batch. The first
free_bulk() starts RCU tasks trace GP and the rest of the elements are
freed while it's in flight. Wait for call_rcu_ttrace_in_progress to clear
in bpf_mem_cache of every cpu and check that free_by_rcu_ttrace and
waiting_for_gp_ttrace lists are empty.

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20260930095920.601738-4-alexei.starovoitov@gmail.com
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>

1 files changed, 57 insertions, 0 deletions

diff --git a/rust/helpers/regulator.c b/rust/helpers/regulator.c
new file mode 100644
index 000000000..9ec5237f4
--- /dev/null
+++ b/rust/helpers/regulator.c
@@ -0,0 +1,57 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/regulator/consumer.h>
+
+#ifndef CONFIG_REGULATOR
+
+__rust_helper void rust_helper_regulator_put(struct regulator *regulator)
+{
+	regulator_put(regulator);
+}
+
+__rust_helper int rust_helper_regulator_set_voltage(struct regulator *regulator,
+						    int min_uV, int max_uV)
+{
+	return regulator_set_voltage(regulator, min_uV, max_uV);
+}
+
+__rust_helper int rust_helper_regulator_get_voltage(struct regulator *regulator)
+{
+	return regulator_get_voltage(regulator);
+}
+
+__rust_helper struct regulator *rust_helper_regulator_get(struct device *dev,
+							  const char *id)
+{
+	return regulator_get(dev, id);
+}
+
+__rust_helper int rust_helper_regulator_enable(struct regulator *regulator)
+{
+	return regulator_enable(regulator);
+}
+
+__rust_helper int rust_helper_regulator_disable(struct regulator *regulator)
+{
+	return regulator_disable(regulator);
+}
+
+__rust_helper int rust_helper_regulator_is_enabled(struct regulator *regulator)
+{
+	return regulator_is_enabled(regulator);
+}
+
+__rust_helper int rust_helper_devm_regulator_get_enable(struct device *dev,
+							const char *id)
+{
+	return devm_regulator_get_enable(dev, id);
+}
+
+__rust_helper int
+rust_helper_devm_regulator_get_enable_optional(struct device *dev,
+					       const char *id)
+{
+	return devm_regulator_get_enable_optional(dev, id);
+}
+
+#endif