From 2c1092853f163762ef0aabc551a630ef233e1be3 Mon Sep 17 00:00:00 2001
From: Wedson Almeida Filho <walmeida@microsoft.com>
Date: Wed, 27 Mar 2024 22:36:03 -0300
Subject: [PATCH] rust: kernel: remove usage of `allocator_api` unstable
feature
With the adoption of `BoxExt` and `VecExt`, we don't need the functions
provided by this feature (namely the methods prefixed with `try_` and
different allocator per collection instance).
We do need `AllocError`, but we define our own as it is a trivial empty
struct.
Reviewed-by: Benno Lossin <benno.lossin@proton.me>
Signed-off-by: Wedson Almeida Filho <walmeida@microsoft.com>
Link: https://lore.kernel.org/r/20240328013603.206764-11-wedsonaf@gmail.com
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
---
rust/kernel/alloc.rs | 4 ++++
rust/kernel/alloc/box_ext.rs | 3 +--
rust/kernel/alloc/vec_ext.rs | 4 ++--
rust/kernel/error.rs | 4 ++--
rust/kernel/init.rs | 3 +--
rust/kernel/lib.rs | 1 -
rust/kernel/str.rs | 3 +--
rust/kernel/sync/arc.rs | 4 ++--
rust/kernel/workqueue.rs | 3 +--
9 files changed, 14 insertions(+), 15 deletions(-)
diff --git a/rust/kernel/alloc.rs b/rust/kernel/alloc.rs
index 9bc1b48b5641b..f1c2c4aa22d2e 100644
--- a/rust/kernel/alloc.rs
+++ b/rust/kernel/alloc.rs
@@ -8,6 +8,10 @@
pub mod box_ext;
pub mod vec_ext;
+/// Indicates an allocation error.
+#[derive(Copy, Clone, PartialEq, Eq, Debug)]
+pub struct AllocError;
+
/// Flags to be used when allocating memory.
///
/// They can be combined with the operators `|`, `&`, and `!`.
diff --git a/rust/kernel/alloc/box_ext.rs b/rust/kernel/alloc/box_ext.rs
index 76653d6f4257b..cdbb5ad166d96 100644
--- a/rust/kernel/alloc/box_ext.rs
+++ b/rust/kernel/alloc/box_ext.rs
@@ -2,9 +2,8 @@
//! Extensions to [`Box`] for fallible allocations.
-use super::Flags;
+use super::{AllocError, Flags};
use alloc::boxed::Box;
-use core::alloc::AllocError;
use core::mem::MaybeUninit;
use core::result::Result;
diff --git a/rust/kernel/alloc/vec_ext.rs b/rust/kernel/alloc/vec_ext.rs
index e24d7c7675cab..6a916fcf8bf12 100644
--- a/rust/kernel/alloc/vec_ext.rs
+++ b/rust/kernel/alloc/vec_ext.rs
@@ -2,8 +2,8 @@
//! Extensions to [`Vec`] for fallible allocations.
-use super::Flags;
-use alloc::{alloc::AllocError, vec::Vec};
+use super::{AllocError, Flags};
+use alloc::vec::Vec;
use core::result::Result;
/// Extensions to [`Vec`].
diff --git a/rust/kernel/error.rs b/rust/kernel/error.rs
index e53466937796e..fc986bc24c6d6 100644
--- a/rust/kernel/error.rs
+++ b/rust/kernel/error.rs
@@ -4,9 +4,9 @@
//!
//! C header: [`include/uapi/asm-generic/errno-base.h`](srctree/include/uapi/asm-generic/errno-base.h)
-use crate::str::CStr;
+use crate::{alloc::AllocError, str::CStr};
-use alloc::alloc::{AllocError, LayoutError};
+use alloc::alloc::LayoutError;
use core::convert::From;
use core::fmt;
diff --git a/rust/kernel/init.rs b/rust/kernel/init.rs
index fec47b274ec3a..9608f2bd2211a 100644
--- a/rust/kernel/init.rs
+++ b/rust/kernel/init.rs
@@ -211,14 +211,13 @@
//! [`pin_init!`]: crate::pin_init!
use crate::{
- alloc::{box_ext::BoxExt, Flags},
+ alloc::{box_ext::BoxExt, AllocError, Flags},
error::{self, Error},
sync::UniqueArc,
types::{Opaque, ScopeGuard},
};
use alloc::boxed::Box;
use core::{
- alloc::AllocError,
cell::UnsafeCell,
convert::Infallible,
marker::PhantomData,
diff --git a/rust/kernel/lib.rs b/rust/kernel/lib.rs
index 1e910fe7c2c77..9a943d99c71a6 100644
--- a/rust/kernel/lib.rs
+++ b/rust/kernel/lib.rs
@@ -12,7 +12,6 @@
//! do so first instead of bypassing this crate.
#![no_std]
-#![feature(allocator_api)]
#![feature(coerce_unsized)]
#![feature(dispatch_from_dyn)]
#![feature(new_uninit)]
diff --git a/rust/kernel/str.rs b/rust/kernel/str.rs
index f454252c62158..27641c3e4df80 100644
--- a/rust/kernel/str.rs
+++ b/rust/kernel/str.rs
@@ -2,8 +2,7 @@
//! String representations.
-use crate::alloc::{flags::*, vec_ext::VecExt};
-use alloc::alloc::AllocError;
+use crate::alloc::{flags::*, vec_ext::VecExt, AllocError};
use alloc::vec::Vec;
use core::fmt::{self, Write};
use core::ops::{self, Deref, DerefMut, Index};
diff --git a/rust/kernel/sync/arc.rs b/rust/kernel/sync/arc.rs
index 0866378f13602..c2a3a2c7cbc5e 100644
--- a/rust/kernel/sync/arc.rs
+++ b/rust/kernel/sync/arc.rs
@@ -16,7 +16,7 @@
//! [`Arc`]: https://doc.rust-lang.org/std/sync/struct.Arc.html
use crate::{
- alloc::{box_ext::BoxExt, Flags},
+ alloc::{box_ext::BoxExt, AllocError, Flags},
bindings,
error::{self, Error},
init::{self, InPlaceInit, Init, PinInit},
@@ -25,7 +25,7 @@
};
use alloc::boxed::Box;
use core::{
- alloc::{AllocError, Layout},
+ alloc::Layout,
fmt,
marker::{PhantomData, Unsize},
mem::{ManuallyDrop, MaybeUninit},
diff --git a/rust/kernel/workqueue.rs b/rust/kernel/workqueue.rs
index ba5fb05130c50..9f47bad0b0037 100644
--- a/rust/kernel/workqueue.rs
+++ b/rust/kernel/workqueue.rs
@@ -132,9 +132,8 @@
//!
//! C header: [`include/linux/workqueue.h`](srctree/include/linux/workqueue.h)
-use crate::alloc::Flags;
+use crate::alloc::{AllocError, Flags};
use crate::{bindings, prelude::*, sync::Arc, sync::LockClassKey, types::Opaque};
-use alloc::alloc::AllocError;
use alloc::boxed::Box;
use core::marker::PhantomData;
use core::pin::Pin;
--
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