linux-kernel - [PATCH 3/4] rust: drm: gem: s/into_gem_obj()/as_gem

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Message-ID: <20250501183717.2058109-4-lyude@redhat.com>
Date: Thu,  1 May 2025 14:33:18 -0400
From: Lyude Paul <lyude@...hat.com>
To: dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org,
	rust-for-linux@...r.kernel.org
Cc: David Airlie <airlied@...il.com>,
	Simona Vetter <simona@...ll.ch>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	Miguel Ojeda <ojeda@...nel.org>,
	Alex Gaynor <alex.gaynor@...il.com>,
	Boqun Feng <boqun.feng@...il.com>,
	Gary Guo <gary@...yguo.net>,
	Björn Roy Baron <bjorn3_gh@...tonmail.com>,
	Benno Lossin <benno.lossin@...ton.me>,
	Andreas Hindborg <a.hindborg@...nel.org>,
	Alice Ryhl <aliceryhl@...gle.com>,
	Trevor Gross <tmgross@...ch.edu>,
	Danilo Krummrich <dakr@...nel.org>,
	Alyssa Rosenzweig <alyssa@...enzweig.io>,
	Asahi Lina <lina@...hilina.net>
Subject: [PATCH 3/4] rust: drm: gem: s/into_gem_obj()/as_gem_obj()/

There's a few changes here:
* The rename, of course (this should also let us drop the clippy annotation
  here)
* Return *mut bindings::drm_gem_object instead of
  &Opaque<bindings::drm_gem_object> - the latter doesn't really have any
  benefit and just results in conversion from the rust type to the C type
  having to be more verbose than necessary.

Signed-off-by: Lyude Paul <lyude@...hat.com>
---
 rust/kernel/drm/gem/mod.rs | 21 +++++++--------------
 1 file changed, 7 insertions(+), 14 deletions(-)

diff --git a/rust/kernel/drm/gem/mod.rs b/rust/kernel/drm/gem/mod.rs
index f70531889c21f..55b2f1d056c39 100644
--- a/rust/kernel/drm/gem/mod.rs
+++ b/rust/kernel/drm/gem/mod.rs
@@ -42,8 +42,7 @@ pub trait IntoGEMObject: Sized + super::private::Sealed {
 
     /// Returns a reference to the raw `drm_gem_object` structure, which must be valid as long as
     /// this owning object is valid.
-    #[allow(clippy::wrong_self_convention)]
-    fn into_gem_obj(&self) -> &Opaque<bindings::drm_gem_object>;
+    fn as_gem_obj(&self) -> *mut bindings::drm_gem_object;
 
     /// Converts a pointer to a `struct drm_gem_object` into a reference to `Self`.
     ///
@@ -99,8 +98,8 @@ extern "C" fn close_callback<T: BaseDriverObject<U>, U: BaseObject>(
 impl<T: DriverObject> IntoGEMObject for Object<T> {
     type Driver = T::Driver;
 
-    fn into_gem_obj(&self) -> &Opaque<bindings::drm_gem_object> {
-        &self.obj
+    fn as_gem_obj(&self) -> *mut bindings::drm_gem_object {
+        self.obj.get()
     }
 
     unsafe fn as_ref<'a>(self_ptr: *mut bindings::drm_gem_object) -> &'a Self {
@@ -119,7 +118,7 @@ pub trait BaseObject
     fn size(&self) -> usize {
         // SAFETY: `self.into_gem_obj()` is guaranteed to be a pointer to a valid `struct
         // drm_gem_object`.
-        unsafe { (*self.into_gem_obj().get()).size }
+        unsafe { (*self.as_gem_obj()).size }
     }
 
     /// Creates a new handle for the object associated with a given `File`
@@ -131,11 +130,7 @@ fn create_handle(
         let mut handle: u32 = 0;
         // SAFETY: The arguments are all valid per the type invariants.
         to_result(unsafe {
-            bindings::drm_gem_handle_create(
-                file.as_raw().cast(),
-                self.into_gem_obj().get(),
-                &mut handle,
-            )
+            bindings::drm_gem_handle_create(file.as_raw().cast(), self.as_gem_obj(), &mut handle)
         })?;
         Ok(handle)
     }
@@ -171,13 +166,11 @@ fn lookup_handle(
     /// Creates an mmap offset to map the object from userspace.
     fn create_mmap_offset(&self) -> Result<u64> {
         // SAFETY: The arguments are valid per the type invariant.
-        to_result(unsafe { bindings::drm_gem_create_mmap_offset(self.into_gem_obj().get()) })?;
+        to_result(unsafe { bindings::drm_gem_create_mmap_offset(self.as_gem_obj()) })?;
 
         // SAFETY: The arguments are valid per the type invariant.
         Ok(unsafe {
-            bindings::drm_vma_node_offset_addr(ptr::addr_of_mut!(
-                (*self.into_gem_obj().get()).vma_node
-            ))
+            bindings::drm_vma_node_offset_addr(ptr::addr_of_mut!((*self.as_gem_obj()).vma_node))
         })
     }
 }
-- 
2.48.1