rust: Use consistent "# Examples" heading style in rustdoc

Use a consistent `# Examples` heading in rustdoc across the codebase.

Some modules previously used `## Examples` (even when they should be
available as top-level headers), while others used `# Example`, which
deviates from the preferred `# Examples` style.

Suggested-by: Miguel Ojeda <[email protected]>
Signed-off-by: Viresh Kumar <[email protected]>
Acked-by: Benno Lossin <[email protected]>
Link: https://lore.kernel.org/r/ddd5ce0ac20c99a72a4f1e4322d3de3911056922.1749545815.git.viresh.kumar@linaro.org
Signed-off-by: Miguel Ojeda <[email protected]>

Author: vireshk

rust/kernel/block/mq.rs

@@ -53,7 +53,7 @@
 //! [`GenDiskBuilder`]: gen_disk::GenDiskBuilder
 //! [`GenDiskBuilder::build`]: gen_disk::GenDiskBuilder::build
 //!
-//! # Example
+//! # Examples
 //!
 //! ```rust
 //! use kernel::{

rust/kernel/clk.rs

@@ -12,7 +12,7 @@ use crate::ffi::c_ulong;
 ///
 /// Represents a frequency in hertz, wrapping a [`c_ulong`] value.
 ///
-/// ## Examples
+/// # Examples
 ///
 /// ```
 /// use kernel::clk::Hertz;
@@ -95,7 +95,7 @@ mod common_clk {
     /// Instances of this type are reference-counted. Calling [`Clk::get`] ensures that the
     /// allocation remains valid for the lifetime of the [`Clk`].
     ///
-    /// ## Examples
+    /// # Examples
     ///
     /// The following example demonstrates how to obtain and configure a clock for a device.
     ///
@@ -266,7 +266,7 @@ mod common_clk {
     /// Instances of this type are reference-counted. Calling [`OptionalClk::get`] ensures that the
     /// allocation remains valid for the lifetime of the [`OptionalClk`].
     ///
-    /// ## Examples
+    /// # Examples
     ///
     /// The following example demonstrates how to obtain and configure an optional clock for a
     /// device. The code functions correctly whether or not the clock is available.

rust/kernel/configfs.rs

@@ -17,7 +17,7 @@
 //!
 //! C header: [`include/linux/configfs.h`](srctree/include/linux/configfs.h)
 //!
-//! # Example
+//! # Examples
 //!
 //! ```ignore
 //! use kernel::alloc::flags;

rust/kernel/cpufreq.rs

@@ -202,7 +202,7 @@ impl From<TableIndex> for usize {
 /// The callers must ensure that the `struct cpufreq_frequency_table` is valid for access and
 /// remains valid for the lifetime of the returned reference.
 ///
-/// ## Examples
+/// # Examples
 ///
 /// The following example demonstrates how to read a frequency value from [`Table`].
 ///
@@ -318,7 +318,7 @@ impl Deref for TableBox {
 ///
 /// This is used by the CPU frequency drivers to build a frequency table dynamically.
 ///
-/// ## Examples
+/// # Examples
 ///
 /// The following example demonstrates how to create a CPU frequency table.
 ///
@@ -395,7 +395,7 @@ impl TableBuilder {
 /// The callers must ensure that the `struct cpufreq_policy` is valid for access and remains valid
 /// for the lifetime of the returned reference.
 ///
-/// ## Examples
+/// # Examples
 ///
 /// The following example demonstrates how to create a CPU frequency table.
 ///
@@ -834,7 +834,7 @@ pub trait Driver {
 
 /// CPU frequency driver Registration.
 ///
-/// ## Examples
+/// # Examples
 ///
 /// The following example demonstrates how to register a cpufreq driver.
 ///

rust/kernel/cpumask.rs

@@ -30,7 +30,7 @@ use core::ops::{Deref, DerefMut};
 /// The callers must ensure that the `struct cpumask` is valid for access and
 /// remains valid for the lifetime of the returned reference.
 ///
-/// ## Examples
+/// # Examples
 ///
 /// The following example demonstrates how to update a [`Cpumask`].
 ///
@@ -175,7 +175,7 @@ impl Cpumask {
 /// The callers must ensure that the `struct cpumask_var_t` is valid for access and remains valid
 /// for the lifetime of [`CpumaskVar`].
 ///
-/// ## Examples
+/// # Examples
 ///
 /// The following example demonstrates how to create and update a [`CpumaskVar`].
 ///

rust/kernel/devres.rs

@@ -44,7 +44,7 @@ struct DevresInner<T> {
 /// [`Devres`] users should make sure to simply free the corresponding backing resource in `T`'s
 /// [`Drop`] implementation.
 ///
-/// # Example
+/// # Examples
 ///
 /// ```no_run
 /// # use kernel::{bindings, c_str, device::{Bound, Device}, devres::Devres, io::{Io, IoRaw}};
@@ -203,7 +203,7 @@ impl<T> Devres<T> {
     /// An error is returned if `dev` does not match the same [`Device`] this [`Devres`] instance
     /// has been created with.
     ///
-    /// # Example
+    /// # Examples
     ///
     /// ```no_run
     /// # #![cfg(CONFIG_PCI)]

rust/kernel/firmware.rs

@@ -140,7 +140,7 @@ unsafe impl Sync for Firmware {}
 /// Typically, such contracts would be enforced by a trait, however traits do not (yet) support
 /// const functions.
 ///
-/// # Example
+/// # Examples
 ///
 /// ```
 /// # mod module_firmware_test {
@@ -262,7 +262,7 @@ impl<const N: usize> ModInfoBuilder<N> {
     /// Append path components to the [`ModInfoBuilder`] instance. Paths need to be separated
     /// with [`ModInfoBuilder::new_entry`].
     ///
-    /// # Example
+    /// # Examples
     ///
     /// ```
     /// use kernel::firmware::ModInfoBuilder;

rust/kernel/opp.rs

@@ -103,7 +103,7 @@ fn to_c_str_array(names: &[CString]) -> Result<KVec<*const u8>> {
 ///
 /// Represents voltage in microvolts, wrapping a [`c_ulong`] value.
 ///
-/// ## Examples
+/// # Examples
 ///
 /// ```
 /// use kernel::opp::MicroVolt;
@@ -128,7 +128,7 @@ impl From<MicroVolt> for c_ulong {
 ///
 /// Represents power in microwatts, wrapping a [`c_ulong`] value.
 ///
-/// ## Examples
+/// # Examples
 ///
 /// ```
 /// use kernel::opp::MicroWatt;
@@ -153,7 +153,7 @@ impl From<MicroWatt> for c_ulong {
 ///
 /// The associated [`OPP`] is automatically removed when the [`Token`] is dropped.
 ///
-/// ## Examples
+/// # Examples
 ///
 /// The following example demonstrates how to create an [`OPP`] dynamically.
 ///
@@ -202,7 +202,7 @@ impl Drop for Token {
 /// Rust abstraction for the C `struct dev_pm_opp_data`, used to define operating performance
 /// points (OPPs) dynamically.
 ///
-/// ## Examples
+/// # Examples
 ///
 /// The following example demonstrates how to create an [`OPP`] with [`Data`].
 ///
@@ -254,7 +254,7 @@ impl Data {
 
 /// [`OPP`] search options.
 ///
-/// ## Examples
+/// # Examples
 ///
 /// Defines how to search for an [`OPP`] in a [`Table`] relative to a frequency.
 ///
@@ -326,7 +326,7 @@ impl Drop for ConfigToken {
 ///
 /// Rust abstraction for the C `struct dev_pm_opp_config`.
 ///
-/// ## Examples
+/// # Examples
 ///
 /// The following example demonstrates how to set OPP property-name configuration for a [`Device`].
 ///
@@ -569,7 +569,7 @@ impl<T: ConfigOps + Default> Config<T> {
 ///
 /// Instances of this type are reference-counted.
 ///
-/// ## Examples
+/// # Examples
 ///
 /// The following example demonstrates how to get OPP [`Table`] for a [`Cpumask`] and set its
 /// frequency.
@@ -1011,7 +1011,7 @@ impl Drop for Table {
 ///
 /// A reference to the [`OPP`], &[`OPP`], isn't refcounted by the Rust code.
 ///
-/// ## Examples
+/// # Examples
 ///
 /// The following example demonstrates how to get [`OPP`] corresponding to a frequency value and
 /// configure the device with it.

rust/kernel/pci.rs

@@ -100,7 +100,7 @@ impl<T: Driver + 'static> Adapter<T> {
 
 /// Declares a kernel module that exposes a single PCI driver.
 ///
-/// # Example
+/// # Examples
 ///
 ///```ignore
 /// kernel::module_pci_driver! {
@@ -194,7 +194,7 @@ macro_rules! pci_device_table {
 
 /// The PCI driver trait.
 ///
-/// # Example
+/// # Examples
 ///
 ///```
 /// # use kernel::{bindings, device::Core, pci};

rust/kernel/platform.rs

@@ -122,7 +122,7 @@ macro_rules! module_platform_driver {
 ///
 /// Drivers must implement this trait in order to get a platform driver registered.
 ///
-/// # Example
+/// # Examples
 ///
 ///```
 /// # use kernel::{bindings, c_str, device::Core, of, platform};