[PATCH 7/8] rust: miscdevice: add `ThisModule` associated type to `MiscDevice` trait

[Alvin Sun]

Add a `ThisModule` associated type bound by `ModuleMetadata` to the
`MiscDevice` trait, and use it to set the miscdevice fops owner field
instead of defaulting to null.

Signed-off-by: Alvin Sun <alvin....@linux.dev>
---
 rust/kernel/miscdevice.rs | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/rust/kernel/miscdevice.rs b/rust/kernel/miscdevice.rs
index 05a6b6b9770f2..007caaae62697 100644
--- a/rust/kernel/miscdevice.rs
+++ b/rust/kernel/miscdevice.rs
@@ -38,6 +38,7 @@
         ForeignOwnable,
         Opaque, //
     },
+    ModuleMetadata, //
 };
 use core::{
     marker::PhantomData,
@@ -137,6 +138,9 @@ pub trait MiscDevice: Sized {
     /// What kind of pointer should `Self` be wrapped in.
     type Ptr: ForeignOwnable + Send + Sync;
 
+    /// The module implementing this driver.
+    type ThisModule: ModuleMetadata;
+
     /// Called when the misc device is opened.
     ///
     /// The returned pointer will be stored as the private data for the file.
@@ -441,6 +445,7 @@ impl<T: MiscDevice> MiscdeviceVTable<T> {
         } else {
             None
         },
+        owner: <T::ThisModule as ModuleMetadata>::MODULE_PTR,
         ..pin_init::zeroed()
     };
 

-- 
2.43.0