[PATCH v2 1/3] rust: helpers: Add list helpers for C linked list operations

[Joel Fernandes <joelagnelf@nvidia.com>]

Add Rust helper functions for common C linked list operations
that are implemented as macros or inline functions and thus not
directly accessible from Rust.

Signed-off-by: Joel Fernandes <joelagnelf@nvidia.com>
---
 rust/helpers/helpers.c |  1 +
 rust/helpers/list.c    | 32 ++++++++++++++++++++++++++++++++
 2 files changed, 33 insertions(+)
 create mode 100644 rust/helpers/list.c

diff --git a/rust/helpers/helpers.c b/rust/helpers/helpers.c
index 79c72762ad9c..634fa2386bbb 100644
--- a/rust/helpers/helpers.c
+++ b/rust/helpers/helpers.c
@@ -32,6 +32,7 @@
 #include "io.c"
 #include "jump_label.c"
 #include "kunit.c"
+#include "list.c"
 #include "maple_tree.c"
 #include "mm.c"
 #include "mutex.c"
diff --git a/rust/helpers/list.c b/rust/helpers/list.c
new file mode 100644
index 000000000000..fea2a18621da
--- /dev/null
+++ b/rust/helpers/list.c
@@ -0,0 +1,32 @@
+// SPDX-License-Identifier: GPL-2.0
+
+/*
+ * Helpers for C Circular doubly linked list implementation.
+ */
+
+#include <linux/list.h>
+
+bool rust_helper_list_empty(const struct list_head *head)
+{
+	return list_empty(head);
+}
+
+void rust_helper_list_del(struct list_head *entry)
+{
+	list_del(entry);
+}
+
+void rust_helper_INIT_LIST_HEAD(struct list_head *list)
+{
+	INIT_LIST_HEAD(list);
+}
+
+void rust_helper_list_add(struct list_head *new, struct list_head *head)
+{
+	list_add(new, head);
+}
+
+void rust_helper_list_add_tail(struct list_head *new, struct list_head *head)
+{
+	list_add_tail(new, head);
+}
-- 
2.34.1