[PATCH 2/6] rust: helpers: add SRCU helpers

[Paul E. McKenney]

From: Onur Özkan <work@xxxxxxxxxxxxx>

Add helper wrappers for SRCU functions that are exposed to Rust
through generated bindings.

Signed-off-by: Onur Özkan <work@xxxxxxxxxxxxx>
Reviewed-by: Gary Guo <gary@xxxxxxxxxxx>
Reviewed-by: Alice Ryhl <aliceryhl@xxxxxxxxxx>
Reviewed-by: Boqun Feng <boqun@xxxxxxxxxx>
Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxx>
---
 rust/helpers/helpers.c |  1 +
 rust/helpers/srcu.c    | 30 ++++++++++++++++++++++++++++++
 2 files changed, 31 insertions(+)
 create mode 100644 rust/helpers/srcu.c

diff --git a/rust/helpers/helpers.c b/rust/helpers/helpers.c
index 998e31052e6601..35954f38ff6a4e 100644
--- a/rust/helpers/helpers.c
+++ b/rust/helpers/helpers.c
@@ -91,6 +91,7 @@
 #include "slab.c"
 #include "spinlock.c"
 #include "string.c"
+#include "srcu.c"
 #include "sync.c"
 #include "task.c"
 #include "time.c"
diff --git a/rust/helpers/srcu.c b/rust/helpers/srcu.c
new file mode 100644
index 00000000000000..225b3bf9334a8f
--- /dev/null
+++ b/rust/helpers/srcu.c
@@ -0,0 +1,30 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/srcu.h>
+
+__rust_helper int rust_helper_init_srcu_struct_with_key(struct srcu_struct *ssp,
+							const char *name,
+							struct lock_class_key *key)
+{
+	return __init_srcu_struct(ssp, name, key);
+}
+
+__rust_helper int rust_helper_srcu_read_lock(struct srcu_struct *ssp)
+{
+	return srcu_read_lock(ssp);
+}
+
+__rust_helper void rust_helper_srcu_read_unlock(struct srcu_struct *ssp, int idx)
+{
+	srcu_read_unlock(ssp, idx);
+}
+
+__rust_helper void rust_helper_srcu_barrier(struct srcu_struct *ssp)
+{
+	srcu_barrier(ssp);
+}
+
+__rust_helper void rust_helper_synchronize_srcu_expedited(struct srcu_struct *ssp)
+{
+	synchronize_srcu_expedited(ssp);
+}
-- 
2.40.1