linux-kernel - [PATCH 13/13] rust: helpers: Remove uaccess helpers

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Message-ID: <20241107020831.1561063-14-alistair.francis@wdc.com>
Date: Thu,  7 Nov 2024 12:08:31 +1000
From: Alistair Francis <alistair23@...il.com>
To: alex.gaynor@...il.com,
	benno.lossin@...ton.me,
	gary@...yguo.net,
	linux-kernel@...r.kernel.org,
	ojeda@...nel.org,
	rust-for-linux@...r.kernel.org,
	bjorn3_gh@...tonmail.com,
	alistair.francis@....com,
	me@...enk.dev,
	a.hindborg@...nel.org,
	tmgross@...ch.edu,
	boqun.feng@...il.com,
	aliceryhl@...gle.com
Cc: alistair23@...il.com
Subject: [PATCH 13/13] rust: helpers: Remove uaccess helpers

Now that we support wrap-static-fns we no longer need the custom helper.

Signed-off-by: Alistair Francis <alistair.francis@....com>
---
 rust/bindgen_static_functions   |  3 +++
 rust/bindings/bindings_helper.h |  1 +
 rust/helpers/helpers.c          |  6 ++----
 rust/helpers/uaccess.c          | 15 ---------------
 4 files changed, 6 insertions(+), 19 deletions(-)
 delete mode 100644 rust/helpers/uaccess.c

diff --git a/rust/bindgen_static_functions b/rust/bindgen_static_functions
index 396e2eac88e5c..4807fecb2f192 100644
--- a/rust/bindgen_static_functions
+++ b/rust/bindgen_static_functions
@@ -26,3 +26,6 @@
 
 --allowlist-function get_task_struct
 --allowlist-function put_task_struct
+
+--allowlist-function copy_from_user
+--allowlist-function copy_to_user
diff --git a/rust/bindings/bindings_helper.h b/rust/bindings/bindings_helper.h
index 1d1d921fd55e9..600ac0046a95f 100644
--- a/rust/bindings/bindings_helper.h
+++ b/rust/bindings/bindings_helper.h
@@ -23,6 +23,7 @@
 #include <linux/sched/signal.h>
 #include <linux/sched/task.h>
 #include <linux/slab.h>
+#include <linux/uaccess.h>
 #include <linux/wait.h>
 #include <linux/workqueue.h>
 
diff --git a/rust/helpers/helpers.c b/rust/helpers/helpers.c
index 2af11499da454..e4e42e0ef946a 100644
--- a/rust/helpers/helpers.c
+++ b/rust/helpers/helpers.c
@@ -1,8 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0
 /*
- * Non-trivial C macros cannot be used in Rust. Similarly, inlined C functions
- * cannot be called either. This file explicitly creates functions ("helpers")
- * that wrap those so that they can be called from Rust.
+ * Non-trivial C macros cannot be used in Rust. This file explicitly creates
+ * functions ("helpers") that wrap those so that they can be called from Rust.
  *
  * Sorted alphabetically.
  */
@@ -14,6 +13,5 @@
 #include "slab.c"
 #include "spinlock.c"
 #include "task.c"
-#include "uaccess.c"
 #include "wait.c"
 #include "workqueue.c"
diff --git a/rust/helpers/uaccess.c b/rust/helpers/uaccess.c
deleted file mode 100644
index f49076f813cd6..0000000000000
--- a/rust/helpers/uaccess.c
+++ /dev/null
@@ -1,15 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-
-#include <linux/uaccess.h>
-
-unsigned long rust_helper_copy_from_user(void *to, const void __user *from,
-					 unsigned long n)
-{
-	return copy_from_user(to, from, n);
-}
-
-unsigned long rust_helper_copy_to_user(void __user *to, const void *from,
-				       unsigned long n)
-{
-	return copy_to_user(to, from, n);
-}
-- 
2.47.0