linux-kernel - [RFC PATCH 4/7] drivers: android: binder: Replace `impl_has

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Message-ID: <20260128215330.58410-5-boqun.feng@gmail.com>
Date: Wed, 28 Jan 2026 13:53:27 -0800
From: Boqun Feng <boqun.feng@...il.com>
To: linux-kernel@...r.kernel.org,
	rust-for-linux@...r.kernel.org,
	rcu@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Arve Hjønnevåg <arve@...roid.com>,
	Todd Kjos <tkjos@...roid.com>,	Christian Brauner <brauner@...nel.org>,
	Carlos Llamas <cmllamas@...gle.com>,	Alice Ryhl <aliceryhl@...gle.com>,
	Miguel Ojeda <ojeda@...nel.org>,	Boqun Feng <boqun.feng@...il.com>,
	Gary Guo <gary@...yguo.net>,
	Björn Roy Baron <bjorn3_gh@...tonmail.com>,
	Benno Lossin <lossin@...nel.org>,
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	Trevor Gross <tmgross@...ch.edu>,	Danilo Krummrich <dakr@...nel.org>,
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	José Expósito <jose.exposito89@...il.com>
Subject: [RFC PATCH 4/7] drivers: android: binder: Replace `impl_has_work!` with `#[derive(HasField)]`

`#[derive(HasField)]` offers less code and better ergonomic for defining
a struct with a Work in it. Hence replace the current usage of
`impl_has_work!()`.

Signed-off-by: Boqun Feng <boqun.feng@...il.com>
---
 drivers/android/binder/process.rs | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/android/binder/process.rs b/drivers/android/binder/process.rs
index 132055b4790f..2a2510e3a0cb 100644
--- a/drivers/android/binder/process.rs
+++ b/drivers/android/binder/process.rs
@@ -423,6 +423,7 @@ fn new() -> Self {
 /// Strictly speaking, there can be multiple of these per process. There is one for each binder fd
 /// that a process has opened, so processes using several binder contexts have several `Process`
 /// objects. This ensures that the contexts are fully separated.
+#[derive(HasField)]
 #[pin_data]
 pub(crate) struct Process {
     pub(crate) ctx: Arc<Context>,
@@ -451,6 +452,7 @@ pub(crate) struct Process {
 
     // Work node for deferred work item.
     #[pin]
+    #[field]
     defer_work: Work<Process>,
 
     // Links for process list in Context.
@@ -460,10 +462,6 @@ pub(crate) struct Process {
     pub(crate) stats: BinderStats,
 }
 
-kernel::impl_has_work! {
-    impl HasWork<Process> for Process { self.defer_work }
-}
-
 kernel::list::impl_list_arc_safe! {
     impl ListArcSafe<0> for Process { untracked; }
 }
-- 
2.50.1 (Apple Git-155)