[PATCH 2/6] rust: io: mem: use non-relaxed I/O ops in examples

Alexandre Courbot
2026-02-02T08:13:39Z

The `_relaxed` I/O variant methods are about to be replaced by a wrapper
type exposing this access pattern with the regular methods of the `Io`
trait. Thus replace the examples to use the regular I/O methods.

Since these are examples, we want them to use the most standard ops
anyway, and the relaxed variants were but an addition that was
MMIO-specific.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
---
rust/kernel/io/mem.rs | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/rust/kernel/io/mem.rs b/rust/kernel/io/mem.rs
index 620022cff401..7dc78d547f7a 100644
--- a/rust/kernel/io/mem.rs
+++ b/rust/kernel/io/mem.rs
@@ -54,6 +54,7 @@ pub(crate) unsafe fn new(device: &'a Device<Bound>, resource: &'a Resource) -> S
/// use kernel::{
/// bindings,
/// device::Core,
+ /// io::Io,
/// of,
/// platform,
/// };
@@ -78,9 +79,9 @@ pub(crate) unsafe fn new(device: &'a Device<Bound>, resource: &'a Resource) -> S
/// let io = iomem.access(pdev.as_ref())?;
///
/// // Read and write a 32-bit value at `offset`.
- /// let data = io.read32_relaxed(offset);
+ /// let data = io.read32(offset);
///
- /// io.write32_relaxed(data, offset);
+ /// io.write32(data, offset);
///
/// # Ok(SampleDriver)
/// }
@@ -117,6 +118,7 @@ pub fn iomap_exclusive_sized<const SIZE: usize>(
/// use kernel::{
/// bindings,
/// device::Core,
+ /// io::Io,
/// of,
/// platform,
/// };
@@ -141,9 +143,9 @@ pub fn iomap_exclusive_sized<const SIZE: usize>(
///
/// let io = iomem.access(pdev.as_ref())?;
///
- /// let data = io.try_read32_relaxed(offset)?;
+ /// let data = io.try_read32(offset)?;
///
- /// io.try_write32_relaxed(data, offset)?;
+ /// io.try_write32(data, offset)?;
///
/// # Ok(SampleDriver)
/// }

--
2.52.0