From dd6ff5cf56fb183fce605ca6a5bfce228cd8888b Mon Sep 17 00:00:00 2001 From: Alice Ryhl Date: Wed, 12 Nov 2025 09:48:35 +0000 Subject: rust: io: add typedef for phys_addr_t The C typedef phys_addr_t is missing an analogue in Rust, meaning that we end up using bindings::phys_addr_t or ResourceSize as a replacement in various places throughout the kernel. Fix that by introducing a new typedef on the Rust side. Place it next to the existing ResourceSize typedef since they're quite related to each other. Cc: stable@vger.kernel.org # for v6.18 [1] Signed-off-by: Alice Ryhl Link: https://patch.msgid.link/20251112-resource-phys-typedefs-v2-4-538307384f82@google.com Link: https://lore.kernel.org/all/20251112-resource-phys-typedefs-v2-0-538307384f82@google.com/ [1] Signed-off-by: Danilo Krummrich --- rust/kernel/io.rs | 20 +++++++++++++++++--- 1 file changed, 17 insertions(+), 3 deletions(-) (limited to 'rust/kernel/io.rs') diff --git a/rust/kernel/io.rs b/rust/kernel/io.rs index b8d0fb27f6ae..98e8b84e68d1 100644 --- a/rust/kernel/io.rs +++ b/rust/kernel/io.rs @@ -15,6 +15,12 @@ pub mod resource; pub use resource::Resource; +/// Physical address type. +/// +/// This is a type alias to either `u32` or `u64` depending on the config option +/// `CONFIG_PHYS_ADDR_T_64BIT`, and it can be a u64 even on 32-bit architectures. +pub type PhysAddr = bindings::phys_addr_t; + /// Resource Size type. /// /// This is a type alias to either `u32` or `u64` depending on the config option @@ -70,8 +76,16 @@ impl IoRaw { /// # Examples /// /// ```no_run -/// # use kernel::{bindings, ffi::c_void, io::{Io, IoRaw}}; -/// # use core::ops::Deref; +/// use kernel::{ +/// bindings, +/// ffi::c_void, +/// io::{ +/// Io, +/// IoRaw, +/// PhysAddr, +/// }, +/// }; +/// use core::ops::Deref; /// /// // See also [`pci::Bar`] for a real example. /// struct IoMem(IoRaw); @@ -84,7 +98,7 @@ impl IoRaw { /// unsafe fn new(paddr: usize) -> Result{ /// // SAFETY: By the safety requirements of this function [`paddr`, `paddr` + `SIZE`) is /// // valid for `ioremap`. -/// let addr = unsafe { bindings::ioremap(paddr as bindings::phys_addr_t, SIZE) }; +/// let addr = unsafe { bindings::ioremap(paddr as PhysAddr, SIZE) }; /// if addr.is_null() { /// return Err(ENOMEM); /// } -- cgit