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-rw-r--r--rust/Makefile8
-rw-r--r--rust/alloc/alloc.rs32
-rw-r--r--rust/alloc/lib.rs6
-rw-r--r--rust/alloc/slice.rs2
-rw-r--r--rust/alloc/vec/mod.rs87
-rw-r--r--rust/bindgen_parameters4
-rw-r--r--rust/bindings/bindings_helper.h6
-rw-r--r--rust/bindings/lib.rs3
-rw-r--r--rust/exports.c2
-rw-r--r--rust/kernel/allocator.rs2
-rw-r--r--rust/kernel/error.rs6
-rw-r--r--rust/kernel/ioctl.rs2
-rw-r--r--rust/kernel/kunit.rs2
-rw-r--r--rust/kernel/print.rs8
-rw-r--r--rust/kernel/str.rs6
-rw-r--r--rust/kernel/sync/condvar.rs30
-rw-r--r--rust/kernel/sync/lock/mutex.rs2
-rw-r--r--rust/kernel/sync/lock/spinlock.rs2
-rw-r--r--rust/kernel/task.rs2
-rw-r--r--rust/kernel/workqueue.rs2
-rw-r--r--rust/macros/lib.rs62
-rw-r--r--rust/macros/paste.rs10
22 files changed, 225 insertions, 61 deletions
diff --git a/rust/Makefile b/rust/Makefile
index 543b37f6c77f1..9d2a16cc91cb4 100644
--- a/rust/Makefile
+++ b/rust/Makefile
@@ -78,6 +78,7 @@ quiet_cmd_rustdoc = RUSTDOC $(if $(rustdoc_host),H, ) $<
$(rustc_target_flags) -L$(objtree)/$(obj) \
--output $(rustdoc_output) \
--crate-name $(subst rustdoc-,,$@) \
+ $(if $(rustdoc_host),,--sysroot=/dev/null) \
@$(objtree)/include/generated/rustc_cfg $<
# The `html_logo_url` and `html_favicon_url` forms of the `doc` attribute
@@ -98,7 +99,8 @@ rustdoc: rustdoc-core rustdoc-macros rustdoc-compiler_builtins \
$(Q)find $(rustdoc_output) -name '*.html' -type f -print0 | xargs -0 sed -Ei \
-e 's:rust-logo-[0-9a-f]+\.svg:logo.svg:g' \
-e 's:favicon-[0-9a-f]+\.svg:logo.svg:g' \
- -e 's:<link rel="alternate icon" type="image/png" href="[/.]+/static\.files/favicon-(16x16|32x32)-[0-9a-f]+\.png">::g'
+ -e 's:<link rel="alternate icon" type="image/png" href="[/.]+/static\.files/favicon-(16x16|32x32)-[0-9a-f]+\.png">::g' \
+ -e 's:<a href="srctree/([^"]+)">:<a href="$(abs_srctree)/\1">:g'
$(Q)for f in $(rustdoc_output)/static.files/rustdoc-*.css; do \
echo ".logo-container > img { object-fit: contain; }" >> $$f; done
@@ -178,6 +180,7 @@ quiet_cmd_rustdoc_test_kernel = RUSTDOC TK $<
--extern build_error --extern macros \
--extern bindings --extern uapi \
--no-run --crate-name kernel -Zunstable-options \
+ --sysroot=/dev/null \
--test-builder $(objtree)/scripts/rustdoc_test_builder \
$< $(rustdoc_test_kernel_quiet); \
$(objtree)/scripts/rustdoc_test_gen
@@ -337,6 +340,8 @@ quiet_cmd_bindgen = BINDGEN $@
$(obj)/bindings/bindings_generated.rs: private bindgen_target_flags = \
$(shell grep -Ev '^#|^$$' $(srctree)/$(src)/bindgen_parameters)
+$(obj)/bindings/bindings_generated.rs: private bindgen_target_extra = ; \
+ sed -Ei 's/pub const RUST_CONST_HELPER_([a-zA-Z0-9_]*)/pub const \1/g' $@
$(obj)/bindings/bindings_generated.rs: $(src)/bindings/bindings_helper.h \
$(src)/bindgen_parameters FORCE
$(call if_changed_dep,bindgen)
@@ -402,6 +407,7 @@ quiet_cmd_rustc_library = $(if $(skip_clippy),RUSTC,$(RUSTC_OR_CLIPPY_QUIET)) L
--emit=metadata=$(dir $@)$(patsubst %.o,lib%.rmeta,$(notdir $@)) \
--crate-type rlib -L$(objtree)/$(obj) \
--crate-name $(patsubst %.o,%,$(notdir $@)) $< \
+ --sysroot=/dev/null \
$(if $(rustc_objcopy),;$(OBJCOPY) $(rustc_objcopy) $@)
rust-analyzer:
diff --git a/rust/alloc/alloc.rs b/rust/alloc/alloc.rs
index 8cb4a31cf6e54..150e13750ff70 100644
--- a/rust/alloc/alloc.rs
+++ b/rust/alloc/alloc.rs
@@ -345,18 +345,31 @@ extern "Rust" {
fn __rust_alloc_error_handler(size: usize, align: usize) -> !;
}
-/// Abort on memory allocation error or failure.
+/// Signal a memory allocation error.
///
-/// Callers of memory allocation APIs wishing to abort computation
+/// Callers of memory allocation APIs wishing to cease execution
/// in response to an allocation error are encouraged to call this function,
-/// rather than directly invoking `panic!` or similar.
+/// rather than directly invoking [`panic!`] or similar.
///
-/// The default behavior of this function is to print a message to standard error
-/// and abort the process.
-/// It can be replaced with [`set_alloc_error_hook`] and [`take_alloc_error_hook`].
+/// This function is guaranteed to diverge (not return normally with a value), but depending on
+/// global configuration, it may either panic (resulting in unwinding or aborting as per
+/// configuration for all panics), or abort the process (with no unwinding).
+///
+/// The default behavior is:
+///
+/// * If the binary links against `std` (typically the case), then
+/// print a message to standard error and abort the process.
+/// This behavior can be replaced with [`set_alloc_error_hook`] and [`take_alloc_error_hook`].
+/// Future versions of Rust may panic by default instead.
+///
+/// * If the binary does not link against `std` (all of its crates are marked
+/// [`#![no_std]`][no_std]), then call [`panic!`] with a message.
+/// [The panic handler] applies as to any panic.
///
/// [`set_alloc_error_hook`]: ../../std/alloc/fn.set_alloc_error_hook.html
/// [`take_alloc_error_hook`]: ../../std/alloc/fn.take_alloc_error_hook.html
+/// [The panic handler]: https://doc.rust-lang.org/reference/runtime.html#the-panic_handler-attribute
+/// [no_std]: https://doc.rust-lang.org/reference/names/preludes.html#the-no_std-attribute
#[stable(feature = "global_alloc", since = "1.28.0")]
#[rustc_const_unstable(feature = "const_alloc_error", issue = "92523")]
#[cfg(all(not(no_global_oom_handling), not(test)))]
@@ -397,9 +410,10 @@ pub mod __alloc_error_handler {
if unsafe { __rust_alloc_error_handler_should_panic != 0 } {
panic!("memory allocation of {size} bytes failed")
} else {
- core::panicking::panic_nounwind_fmt(format_args!(
- "memory allocation of {size} bytes failed"
- ))
+ core::panicking::panic_nounwind_fmt(
+ format_args!("memory allocation of {size} bytes failed"),
+ /* force_no_backtrace */ false,
+ )
}
}
}
diff --git a/rust/alloc/lib.rs b/rust/alloc/lib.rs
index 73b9ffd845d95..9c7ea73da1080 100644
--- a/rust/alloc/lib.rs
+++ b/rust/alloc/lib.rs
@@ -90,8 +90,8 @@
#![warn(missing_docs)]
#![allow(explicit_outlives_requirements)]
#![warn(multiple_supertrait_upcastable)]
-#![cfg_attr(not(bootstrap), allow(internal_features))]
-#![cfg_attr(not(bootstrap), allow(rustdoc::redundant_explicit_links))]
+#![allow(internal_features)]
+#![allow(rustdoc::redundant_explicit_links)]
//
// Library features:
// tidy-alphabetical-start
@@ -122,6 +122,7 @@
#![feature(const_waker)]
#![feature(core_intrinsics)]
#![feature(core_panic)]
+#![feature(deprecated_suggestion)]
#![feature(dispatch_from_dyn)]
#![feature(error_generic_member_access)]
#![feature(error_in_core)]
@@ -145,7 +146,6 @@
#![feature(ptr_metadata)]
#![feature(ptr_sub_ptr)]
#![feature(receiver_trait)]
-#![feature(saturating_int_impl)]
#![feature(set_ptr_value)]
#![feature(sized_type_properties)]
#![feature(slice_from_ptr_range)]
diff --git a/rust/alloc/slice.rs b/rust/alloc/slice.rs
index 6ac463bd3edc5..1181836da5f46 100644
--- a/rust/alloc/slice.rs
+++ b/rust/alloc/slice.rs
@@ -594,7 +594,7 @@ impl<T> [T] {
/// ```
#[rustc_allow_incoherent_impl]
#[stable(feature = "rust1", since = "1.0.0")]
- #[deprecated(since = "1.3.0", note = "renamed to join")]
+ #[deprecated(since = "1.3.0", note = "renamed to join", suggestion = "join")]
pub fn connect<Separator>(&self, sep: Separator) -> <Self as Join<Separator>>::Output
where
Self: Join<Separator>,
diff --git a/rust/alloc/vec/mod.rs b/rust/alloc/vec/mod.rs
index 209a88cfe598f..41ca71805ef09 100644
--- a/rust/alloc/vec/mod.rs
+++ b/rust/alloc/vec/mod.rs
@@ -1228,8 +1228,8 @@ impl<T, A: Allocator> Vec<T, A> {
/// Shortens the vector, keeping the first `len` elements and dropping
/// the rest.
///
- /// If `len` is greater than the vector's current length, this has no
- /// effect.
+ /// If `len` is greater or equal to the vector's current length, this has
+ /// no effect.
///
/// The [`drain`] method can emulate `truncate`, but causes the excess
/// elements to be returned instead of dropped.
@@ -1336,6 +1336,15 @@ impl<T, A: Allocator> Vec<T, A> {
/// is never written to (except inside an `UnsafeCell`) using this pointer or any pointer
/// derived from it. If you need to mutate the contents of the slice, use [`as_mut_ptr`].
///
+ /// This method guarantees that for the purpose of the aliasing model, this method
+ /// does not materialize a reference to the underlying slice, and thus the returned pointer
+ /// will remain valid when mixed with other calls to [`as_ptr`] and [`as_mut_ptr`].
+ /// Note that calling other methods that materialize mutable references to the slice,
+ /// or mutable references to specific elements you are planning on accessing through this pointer,
+ /// as well as writing to those elements, may still invalidate this pointer.
+ /// See the second example below for how this guarantee can be used.
+ ///
+ ///
/// # Examples
///
/// ```
@@ -1349,8 +1358,25 @@ impl<T, A: Allocator> Vec<T, A> {
/// }
/// ```
///
+ /// Due to the aliasing guarantee, the following code is legal:
+ ///
+ /// ```rust
+ /// unsafe {
+ /// let mut v = vec![0, 1, 2];
+ /// let ptr1 = v.as_ptr();
+ /// let _ = ptr1.read();
+ /// let ptr2 = v.as_mut_ptr().offset(2);
+ /// ptr2.write(2);
+ /// // Notably, the write to `ptr2` did *not* invalidate `ptr1`
+ /// // because it mutated a different element:
+ /// let _ = ptr1.read();
+ /// }
+ /// ```
+ ///
/// [`as_mut_ptr`]: Vec::as_mut_ptr
+ /// [`as_ptr`]: Vec::as_ptr
#[stable(feature = "vec_as_ptr", since = "1.37.0")]
+ #[cfg_attr(not(bootstrap), rustc_never_returns_null_ptr)]
#[inline]
pub fn as_ptr(&self) -> *const T {
// We shadow the slice method of the same name to avoid going through
@@ -1366,6 +1392,15 @@ impl<T, A: Allocator> Vec<T, A> {
/// Modifying the vector may cause its buffer to be reallocated,
/// which would also make any pointers to it invalid.
///
+ /// This method guarantees that for the purpose of the aliasing model, this method
+ /// does not materialize a reference to the underlying slice, and thus the returned pointer
+ /// will remain valid when mixed with other calls to [`as_ptr`] and [`as_mut_ptr`].
+ /// Note that calling other methods that materialize references to the slice,
+ /// or references to specific elements you are planning on accessing through this pointer,
+ /// may still invalidate this pointer.
+ /// See the second example below for how this guarantee can be used.
+ ///
+ ///
/// # Examples
///
/// ```
@@ -1383,7 +1418,25 @@ impl<T, A: Allocator> Vec<T, A> {
/// }
/// assert_eq!(&*x, &[0, 1, 2, 3]);
/// ```
+ ///
+ /// Due to the aliasing guarantee, the following code is legal:
+ ///
+ /// ```rust
+ /// unsafe {
+ /// let mut v = vec![0];
+ /// let ptr1 = v.as_mut_ptr();
+ /// ptr1.write(1);
+ /// let ptr2 = v.as_mut_ptr();
+ /// ptr2.write(2);
+ /// // Notably, the write to `ptr2` did *not* invalidate `ptr1`:
+ /// ptr1.write(3);
+ /// }
+ /// ```
+ ///
+ /// [`as_mut_ptr`]: Vec::as_mut_ptr
+ /// [`as_ptr`]: Vec::as_ptr
#[stable(feature = "vec_as_ptr", since = "1.37.0")]
+ #[cfg_attr(not(bootstrap), rustc_never_returns_null_ptr)]
#[inline]
pub fn as_mut_ptr(&mut self) -> *mut T {
// We shadow the slice method of the same name to avoid going through
@@ -3404,6 +3457,36 @@ impl<T: Clone> From<&mut [T]> for Vec<T> {
}
#[cfg(not(no_global_oom_handling))]
+#[stable(feature = "vec_from_array_ref", since = "1.74.0")]
+impl<T: Clone, const N: usize> From<&[T; N]> for Vec<T> {
+ /// Allocate a `Vec<T>` and fill it by cloning `s`'s items.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// assert_eq!(Vec::from(&[1, 2, 3]), vec![1, 2, 3]);
+ /// ```
+ fn from(s: &[T; N]) -> Vec<T> {
+ Self::from(s.as_slice())
+ }
+}
+
+#[cfg(not(no_global_oom_handling))]
+#[stable(feature = "vec_from_array_ref", since = "1.74.0")]
+impl<T: Clone, const N: usize> From<&mut [T; N]> for Vec<T> {
+ /// Allocate a `Vec<T>` and fill it by cloning `s`'s items.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// assert_eq!(Vec::from(&mut [1, 2, 3]), vec![1, 2, 3]);
+ /// ```
+ fn from(s: &mut [T; N]) -> Vec<T> {
+ Self::from(s.as_mut_slice())
+ }
+}
+
+#[cfg(not(no_global_oom_handling))]
#[stable(feature = "vec_from_array", since = "1.44.0")]
impl<T, const N: usize> From<[T; N]> for Vec<T> {
/// Allocate a `Vec<T>` and move `s`'s items into it.
diff --git a/rust/bindgen_parameters b/rust/bindgen_parameters
index 552d9a85925b9..a721d466bee4b 100644
--- a/rust/bindgen_parameters
+++ b/rust/bindgen_parameters
@@ -20,3 +20,7 @@
# `seccomp`'s comment gets understood as a doctest
--no-doc-comments
+
+# These functions use the `__preserve_most` calling convention, which neither bindgen
+# nor Rust currently understand, and which Clang currently declares to be unstable.
+--blocklist-function __list_.*_report
diff --git a/rust/bindings/bindings_helper.h b/rust/bindings/bindings_helper.h
index eaf01df7d97a7..c0cb4b05b9185 100644
--- a/rust/bindings/bindings_helper.h
+++ b/rust/bindings/bindings_helper.h
@@ -18,6 +18,6 @@
#include <linux/workqueue.h>
/* `bindgen` gets confused at certain things. */
-const size_t BINDINGS_ARCH_SLAB_MINALIGN = ARCH_SLAB_MINALIGN;
-const gfp_t BINDINGS_GFP_KERNEL = GFP_KERNEL;
-const gfp_t BINDINGS___GFP_ZERO = __GFP_ZERO;
+const size_t RUST_CONST_HELPER_ARCH_SLAB_MINALIGN = ARCH_SLAB_MINALIGN;
+const gfp_t RUST_CONST_HELPER_GFP_KERNEL = GFP_KERNEL;
+const gfp_t RUST_CONST_HELPER___GFP_ZERO = __GFP_ZERO;
diff --git a/rust/bindings/lib.rs b/rust/bindings/lib.rs
index 9bcbea04dac30..40ddaee50d8bd 100644
--- a/rust/bindings/lib.rs
+++ b/rust/bindings/lib.rs
@@ -48,6 +48,3 @@ mod bindings_helper {
}
pub use bindings_raw::*;
-
-pub const GFP_KERNEL: gfp_t = BINDINGS_GFP_KERNEL;
-pub const __GFP_ZERO: gfp_t = BINDINGS___GFP_ZERO;
diff --git a/rust/exports.c b/rust/exports.c
index 83e2a7070cae8..3803c21d1403e 100644
--- a/rust/exports.c
+++ b/rust/exports.c
@@ -11,7 +11,7 @@
* accidentally exposed.
*/
-#include <linux/module.h>
+#include <linux/export.h>
#define EXPORT_SYMBOL_RUST_GPL(sym) extern int sym; EXPORT_SYMBOL_GPL(sym)
diff --git a/rust/kernel/allocator.rs b/rust/kernel/allocator.rs
index a8f3d5be1af1e..4b057e837358c 100644
--- a/rust/kernel/allocator.rs
+++ b/rust/kernel/allocator.rs
@@ -21,7 +21,7 @@ unsafe fn krealloc_aligned(ptr: *mut u8, new_layout: Layout, flags: bindings::gf
let mut size = layout.size();
- if layout.align() > bindings::BINDINGS_ARCH_SLAB_MINALIGN {
+ if layout.align() > bindings::ARCH_SLAB_MINALIGN {
// The alignment requirement exceeds the slab guarantee, thus try to enlarge the size
// to use the "power-of-two" size/alignment guarantee (see comments in `kmalloc()` for
// more information).
diff --git a/rust/kernel/error.rs b/rust/kernel/error.rs
index 032b645439539..4f0c1edd63b7a 100644
--- a/rust/kernel/error.rs
+++ b/rust/kernel/error.rs
@@ -2,7 +2,7 @@
//! Kernel errors.
//!
-//! C header: [`include/uapi/asm-generic/errno-base.h`](../../../include/uapi/asm-generic/errno-base.h)
+//! C header: [`include/uapi/asm-generic/errno-base.h`](srctree/include/uapi/asm-generic/errno-base.h)
use crate::str::CStr;
@@ -335,3 +335,7 @@ where
Err(e) => T::from(e.to_errno() as i16),
}
}
+
+/// Error message for calling a default function of a [`#[vtable]`](macros::vtable) trait.
+pub const VTABLE_DEFAULT_ERROR: &str =
+ "This function must not be called, see the #[vtable] documentation.";
diff --git a/rust/kernel/ioctl.rs b/rust/kernel/ioctl.rs
index c49e1a8d3fd07..f1d42ab699727 100644
--- a/rust/kernel/ioctl.rs
+++ b/rust/kernel/ioctl.rs
@@ -2,7 +2,7 @@
//! ioctl() number definitions
//!
-//! C header: [`include/asm-generic/ioctl.h`](../../../../include/asm-generic/ioctl.h)
+//! C header: [`include/asm-generic/ioctl.h`](srctree/include/asm-generic/ioctl.h)
#![allow(non_snake_case)]
diff --git a/rust/kernel/kunit.rs b/rust/kernel/kunit.rs
index 722655b2d62df..0ba77276ae7ef 100644
--- a/rust/kernel/kunit.rs
+++ b/rust/kernel/kunit.rs
@@ -2,7 +2,7 @@
//! KUnit-based macros for Rust unit tests.
//!
-//! C header: [`include/kunit/test.h`](../../../../../include/kunit/test.h)
+//! C header: [`include/kunit/test.h`](srctree/include/kunit/test.h)
//!
//! Reference: <https://docs.kernel.org/dev-tools/kunit/index.html>
diff --git a/rust/kernel/print.rs b/rust/kernel/print.rs
index f48926e3e9fe3..9b13aca832c2d 100644
--- a/rust/kernel/print.rs
+++ b/rust/kernel/print.rs
@@ -2,7 +2,7 @@
//! Printing facilities.
//!
-//! C header: [`include/linux/printk.h`](../../../../include/linux/printk.h)
+//! C header: [`include/linux/printk.h`](srctree/include/linux/printk.h)
//!
//! Reference: <https://www.kernel.org/doc/html/latest/core-api/printk-basics.html>
@@ -48,7 +48,7 @@ pub mod format_strings {
/// The format string is always the same for a given level, i.e. for a
/// given `prefix`, which are the kernel's `KERN_*` constants.
///
- /// [`_printk`]: ../../../../include/linux/printk.h
+ /// [`_printk`]: srctree/include/linux/printk.h
const fn generate(is_cont: bool, prefix: &[u8; 3]) -> [u8; LENGTH] {
// Ensure the `KERN_*` macros are what we expect.
assert!(prefix[0] == b'\x01');
@@ -97,7 +97,7 @@ pub mod format_strings {
/// The format string must be one of the ones in [`format_strings`], and
/// the module name must be null-terminated.
///
-/// [`_printk`]: ../../../../include/linux/_printk.h
+/// [`_printk`]: srctree/include/linux/_printk.h
#[doc(hidden)]
#[cfg_attr(not(CONFIG_PRINTK), allow(unused_variables))]
pub unsafe fn call_printk(
@@ -120,7 +120,7 @@ pub unsafe fn call_printk(
///
/// Public but hidden since it should only be used from public macros.
///
-/// [`_printk`]: ../../../../include/linux/printk.h
+/// [`_printk`]: srctree/include/linux/printk.h
#[doc(hidden)]
#[cfg_attr(not(CONFIG_PRINTK), allow(unused_variables))]
pub fn call_printk_cont(args: fmt::Arguments<'_>) {
diff --git a/rust/kernel/str.rs b/rust/kernel/str.rs
index c41607b2e4fe9..7d848b83add48 100644
--- a/rust/kernel/str.rs
+++ b/rust/kernel/str.rs
@@ -608,6 +608,12 @@ impl<'a> TryFrom<&'a CStr> for CString {
}
}
+impl fmt::Debug for CString {
+ fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+ fmt::Debug::fmt(&**self, f)
+ }
+}
+
/// A convenience alias for [`core::format_args`].
#[macro_export]
macro_rules! fmt {
diff --git a/rust/kernel/sync/condvar.rs b/rust/kernel/sync/condvar.rs
index b679b6f6dbebc..f65e19d5a37c1 100644
--- a/rust/kernel/sync/condvar.rs
+++ b/rust/kernel/sync/condvar.rs
@@ -50,7 +50,7 @@ macro_rules! new_condvar {
/// fn wait_for_value(e: &Example, v: u32) {
/// let mut guard = e.value.lock();
/// while *guard != v {
-/// e.value_changed.wait_uninterruptible(&mut guard);
+/// e.value_changed.wait(&mut guard);
/// }
/// }
///
@@ -69,7 +69,7 @@ macro_rules! new_condvar {
/// }
/// ```
///
-/// [`struct wait_queue_head`]: ../../../include/linux/wait.h
+/// [`struct wait_queue_head`]: srctree/include/linux/wait.h
#[pin_data]
pub struct CondVar {
#[pin]
@@ -120,28 +120,28 @@ impl CondVar {
unsafe { bindings::finish_wait(self.wait_list.get(), wait.get()) };
}
- /// Releases the lock and waits for a notification in interruptible mode.
+ /// Releases the lock and waits for a notification in uninterruptible mode.
///
/// Atomically releases the given lock (whose ownership is proven by the guard) and puts the
/// thread to sleep, reacquiring the lock on wake up. It wakes up when notified by
- /// [`CondVar::notify_one`] or [`CondVar::notify_all`], or when the thread receives a signal.
- /// It may also wake up spuriously.
+ /// [`CondVar::notify_one`] or [`CondVar::notify_all`]. Note that it may also wake up
+ /// spuriously.
+ pub fn wait<T: ?Sized, B: Backend>(&self, guard: &mut Guard<'_, T, B>) {
+ self.wait_internal(bindings::TASK_UNINTERRUPTIBLE, guard);
+ }
+
+ /// Releases the lock and waits for a notification in interruptible mode.
+ ///
+ /// Similar to [`CondVar::wait`], except that the wait is interruptible. That is, the thread may
+ /// wake up due to signals. It may also wake up spuriously.
///
/// Returns whether there is a signal pending.
- #[must_use = "wait returns if a signal is pending, so the caller must check the return value"]
- pub fn wait<T: ?Sized, B: Backend>(&self, guard: &mut Guard<'_, T, B>) -> bool {
+ #[must_use = "wait_interruptible returns if a signal is pending, so the caller must check the return value"]
+ pub fn wait_interruptible<T: ?Sized, B: Backend>(&self, guard: &mut Guard<'_, T, B>) -> bool {
self.wait_internal(bindings::TASK_INTERRUPTIBLE, guard);
crate::current!().signal_pending()
}
- /// Releases the lock and waits for a notification in uninterruptible mode.
- ///
- /// Similar to [`CondVar::wait`], except that the wait is not interruptible. That is, the
- /// thread won't wake up due to signals. It may, however, wake up supirously.
- pub fn wait_uninterruptible<T: ?Sized, B: Backend>(&self, guard: &mut Guard<'_, T, B>) {
- self.wait_internal(bindings::TASK_UNINTERRUPTIBLE, guard)
- }
-
/// Calls the kernel function to notify the appropriate number of threads with the given flags.
fn notify(&self, count: i32, flags: u32) {
// SAFETY: `wait_list` points to valid memory.
diff --git a/rust/kernel/sync/lock/mutex.rs b/rust/kernel/sync/lock/mutex.rs
index 09276fedc091b..8c524a3ec45af 100644
--- a/rust/kernel/sync/lock/mutex.rs
+++ b/rust/kernel/sync/lock/mutex.rs
@@ -84,7 +84,7 @@ macro_rules! new_mutex {
/// }
/// ```
///
-/// [`struct mutex`]: ../../../../include/linux/mutex.h
+/// [`struct mutex`]: srctree/include/linux/mutex.h
pub type Mutex<T> = super::Lock<T, MutexBackend>;
/// A kernel `struct mutex` lock backend.
diff --git a/rust/kernel/sync/lock/spinlock.rs b/rust/kernel/sync/lock/spinlock.rs
index 91eb2c9e9123f..068535ce1b29f 100644
--- a/rust/kernel/sync/lock/spinlock.rs
+++ b/rust/kernel/sync/lock/spinlock.rs
@@ -82,7 +82,7 @@ macro_rules! new_spinlock {
/// }
/// ```
///
-/// [`spinlock_t`]: ../../../../include/linux/spinlock.h
+/// [`spinlock_t`]: srctree/include/linux/spinlock.h
pub type SpinLock<T> = super::Lock<T, SpinLockBackend>;
/// A kernel `spinlock_t` lock backend.
diff --git a/rust/kernel/task.rs b/rust/kernel/task.rs
index b2299bc7ac1ff..9451932d5d867 100644
--- a/rust/kernel/task.rs
+++ b/rust/kernel/task.rs
@@ -2,7 +2,7 @@
//! Tasks (threads and processes).
//!
-//! C header: [`include/linux/sched.h`](../../../../include/linux/sched.h).
+//! C header: [`include/linux/sched.h`](srctree/include/linux/sched.h).
use crate::{bindings, types::Opaque};
use core::{marker::PhantomData, ops::Deref, ptr};
diff --git a/rust/kernel/workqueue.rs b/rust/kernel/workqueue.rs
index b67fb1ba168ed..4983978773767 100644
--- a/rust/kernel/workqueue.rs
+++ b/rust/kernel/workqueue.rs
@@ -132,7 +132,7 @@
//! }
//! ```
//!
-//! C header: [`include/linux/workqueue.h`](../../../../include/linux/workqueue.h)
+//! C header: [`include/linux/workqueue.h`](srctree/include/linux/workqueue.h)
use crate::{bindings, prelude::*, sync::Arc, sync::LockClassKey, types::Opaque};
use alloc::alloc::AllocError;
diff --git a/rust/macros/lib.rs b/rust/macros/lib.rs
index c42105c2ff963..f489f31573832 100644
--- a/rust/macros/lib.rs
+++ b/rust/macros/lib.rs
@@ -20,7 +20,7 @@ use proc_macro::TokenStream;
/// The `type` argument should be a type which implements the [`Module`]
/// trait. Also accepts various forms of kernel metadata.
///
-/// C header: [`include/linux/moduleparam.h`](../../../include/linux/moduleparam.h)
+/// C header: [`include/linux/moduleparam.h`](srctree/include/linux/moduleparam.h)
///
/// [`Module`]: ../kernel/trait.Module.html
///
@@ -87,27 +87,49 @@ pub fn module(ts: TokenStream) -> TokenStream {
/// implementation could just return `Error::EINVAL`); Linux typically use C
/// `NULL` pointers to represent these functions.
///
-/// This attribute is intended to close the gap. Traits can be declared and
-/// implemented with the `#[vtable]` attribute, and a `HAS_*` associated constant
-/// will be generated for each method in the trait, indicating if the implementor
-/// has overridden a method.
+/// This attribute closes that gap. A trait can be annotated with the
+/// `#[vtable]` attribute. Implementers of the trait will then also have to
+/// annotate the trait with `#[vtable]`. This attribute generates a `HAS_*`
+/// associated constant bool for each method in the trait that is set to true if
+/// the implementer has overridden the associated method.
+///
+/// For a trait method to be optional, it must have a default implementation.
+/// This is also the case for traits annotated with `#[vtable]`, but in this
+/// case the default implementation will never be executed. The reason for this
+/// is that the functions will be called through function pointers installed in
+/// C side vtables. When an optional method is not implemented on a `#[vtable]`
+/// trait, a NULL entry is installed in the vtable. Thus the default
+/// implementation is never called. Since these traits are not designed to be
+/// used on the Rust side, it should not be possible to call the default
+/// implementation. This is done to ensure that we call the vtable methods
+/// through the C vtable, and not through the Rust vtable. Therefore, the
+/// default implementation should call `kernel::build_error`, which prevents
+/// calls to this function at compile time:
+///
+/// ```compile_fail
+/// # use kernel::error::VTABLE_DEFAULT_ERROR;
+/// kernel::build_error(VTABLE_DEFAULT_ERROR)
+/// ```
+///
+/// Note that you might need to import [`kernel::error::VTABLE_DEFAULT_ERROR`].
///
-/// This attribute is not needed if all methods are required.
+/// This macro should not be used when all functions are required.
///
/// # Examples
///
/// ```ignore
+/// use kernel::error::VTABLE_DEFAULT_ERROR;
/// use kernel::prelude::*;
///
/// // Declares a `#[vtable]` trait
/// #[vtable]
/// pub trait Operations: Send + Sync + Sized {
/// fn foo(&self) -> Result<()> {
-/// Err(EINVAL)
+/// kernel::build_error(VTABLE_DEFAULT_ERROR)
/// }
///
/// fn bar(&self) -> Result<()> {
-/// Err(EINVAL)
+/// kernel::build_error(VTABLE_DEFAULT_ERROR)
/// }
/// }
///
@@ -125,6 +147,8 @@ pub fn module(ts: TokenStream) -> TokenStream {
/// assert_eq!(<Foo as Operations>::HAS_FOO, true);
/// assert_eq!(<Foo as Operations>::HAS_BAR, false);
/// ```
+///
+/// [`kernel::error::VTABLE_DEFAULT_ERROR`]: ../kernel/error/constant.VTABLE_DEFAULT_ERROR.html
#[proc_macro_attribute]
pub fn vtable(attr: TokenStream, ts: TokenStream) -> TokenStream {
vtable::vtable(attr, ts)
@@ -254,8 +278,8 @@ pub fn pinned_drop(args: TokenStream, input: TokenStream) -> TokenStream {
/// Within the `paste!` macro, identifiers inside `[<` and `>]` are concatenated together to form a
/// single identifier.
///
-/// This is similar to the [`paste`] crate, but with pasting feature limited to identifiers
-/// (literals, lifetimes and documentation strings are not supported). There is a difference in
+/// This is similar to the [`paste`] crate, but with pasting feature limited to identifiers and
+/// literals (lifetimes and documentation strings are not supported). There is a difference in
/// supported modifiers as well.
///
/// # Example
@@ -337,6 +361,24 @@ pub fn pinned_drop(args: TokenStream, input: TokenStream) -> TokenStream {
/// assert_eq!(br_ok(), binder_driver_return_protocol_BR_OK);
/// ```
///
+/// # Literals
+///
+/// Literals can also be concatenated with other identifiers:
+///
+/// ```ignore
+/// macro_rules! create_numbered_fn {
+/// ($name:literal, $val:literal) => {
+/// kernel::macros::paste! {
+/// fn [<some_ $name _fn $val>]() -> u32 { $val }
+/// }
+/// };
+/// }
+///
+/// create_numbered_fn!("foo", 100);
+///
+/// assert_eq!(some_foo_fn100(), 100)
+/// ```
+///
/// [`paste`]: https://docs.rs/paste/
#[proc_macro]
pub fn paste(input: TokenStream) -> TokenStream {
diff --git a/rust/macros/paste.rs b/rust/macros/paste.rs
index 385a78434224f..f40d42b35b586 100644
--- a/rust/macros/paste.rs
+++ b/rust/macros/paste.rs
@@ -9,7 +9,15 @@ fn concat(tokens: &[TokenTree], group_span: Span) -> TokenTree {
loop {
match tokens.next() {
None => break,
- Some(TokenTree::Literal(lit)) => segments.push((lit.to_string(), lit.span())),
+ Some(TokenTree::Literal(lit)) => {
+ // Allow us to concat string literals by stripping quotes
+ let mut value = lit.to_string();
+ if value.starts_with('"') && value.ends_with('"') {
+ value.remove(0);
+ value.pop();
+ }
+ segments.push((value, lit.span()));
+ }
Some(TokenTree::Ident(ident)) => {
let mut value = ident.to_string();
if value.starts_with("r#") {
generated by cgit 1.2.3-korg (git 2.39.0) at 2024-05-20 03:57:01 +0000