LIST: [PATCH v2 2/3] rust: configfs: introduce rust support for configfs

This patch adds a rust API for configfs, thus allowing rust modules to use
configfs for configuration. The implementation is a shim on top of the C
configfs implementation allowing safe use of the C infrastructure from
rust.

The patch enables the `const_mut_refs` feature on compilers before rustc
1.83. The feature was stabilized in rustc 1.83 and is not required to be
explicitly enabled on later versions.

Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Andreas Hindborg <[email protected]>

Author: Andreas Hindborg

rust/bindings/bindings_helper.h

@@ -10,6 +10,7 @@
 #include <linux/blk-mq.h>
 #include <linux/blk_types.h>
 #include <linux/blkdev.h>
+#include <linux/configfs.h>
 #include <linux/cred.h>
 #include <linux/errname.h>
 #include <linux/ethtool.h>

rust/helpers/mutex.c

@@ -18,3 +18,8 @@ void rust_helper_mutex_assert_is_held(struct mutex *mutex)
 {
 	lockdep_assert_held(mutex);
 }
+
+void rust_helper_mutex_destroy(struct mutex *lock)
+{
+	mutex_destroy(lock);
+}