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linux/rust/kernel
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Danilo Krummrich bfcaf4e8ae rust: io: macro_export io_define_read!() and io_define_write!() 
Currently, the define_read!() and define_write!() I/O macros are crate
public. The only user outside of the I/O module is PCI (for the
configurations space I/O backend). Consequently, when CONFIG_PCI=n this
causes a compile time warning [1].

In order to fix this, rename the macros to io_define_read!() and
io_define_write!() and use #[macro_export] to export them.

This is better than making the crate public visibility conditional, as
eventually subsystems will have their own crate.

Also, I/O backends are valid to be implemented by drivers as well. For
instance, there are devices (such as GPUs) that run firmware which
allows to program other devices only accessible through the primary
device through indirect I/O.

Since the macros are now public, also add the corresponding
documentation.

Fixes: 121d87b28e ("rust: io: separate generic I/O helpers from MMIO implementation")
Reported-by: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
Closes: https://lore.kernel.org/driver-core/CANiq72khOYkt6t5zwMvSiyZvWWHMZuNCMERXu=7K=_5tT-8Pgg@mail.gmail.com/ [1]
Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Reviewed-by: Daniel Almeida <daniel.almeida@collabora.com>
Link: https://patch.msgid.link/20260216131534.65008-1-dakr@kernel.org
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
2026-02-23 00:54:02 +01:00
..
alloc rust: alloc: use kernel::fmt 2025-10-20 04:04:23 +02:00
block rust: block: mq: use pin_init::zeroed() for tag_set 2026-01-21 07:37:15 -07:00
debugfs Driver core changes for 7.0-rc1 2026-02-11 17:43:59 -08:00
device rust: device: replace kernel::c_str! with C-Strings 2025-12-22 17:30:24 +01:00
drm rust/drm: Fix Registration::{new,new_foreign_owned}() docs 2026-01-23 14:18:07 -05:00
fs rust: fs: add file::Offset type alias 2025-11-05 00:05:38 +01:00
io Linux 6.19-rc7 2026-01-26 13:23:52 +01:00
iommu rust: iommu: fix srctree link warning 2026-01-22 09:19:30 +01:00
irq Rust fixes for v7.0-rc1 2026-02-22 08:43:31 -08:00
list Rust fixes for v7.0-rc1 2026-02-22 08:43:31 -08:00
mm mm: introduce VMA flags bitmap type 2025-11-29 10:41:09 -08:00
net rust: net: replace kernel::c_str! with C-Strings 2026-01-05 16:32:39 -08:00
num rust: num: bounded: clean __new documentation and comments 2026-01-26 02:53:16 +01:00
pci rust: io: macro_export io_define_read!() and io_define_write!() 2026-02-23 00:54:02 +01:00
str rust: str: add radix prefixed integer parsing functions 2025-11-03 14:40:45 +01:00
sync Char/Misc/IIO driver changes for 7.0-rc1 2026-02-17 09:11:04 -08:00
time rust: add udelay() function 2025-11-04 13:25:29 +01:00
.gitignore rust: Add warn_on macro 2025-07-23 02:05:58 +02:00
acpi.rs rust: acpi: replace core::mem::zeroed with pin_init::zeroed 2025-10-27 20:27:05 +01:00
alloc.rs Summary of significant series in this pull request: 2025-10-02 18:18:33 -07:00
auxiliary.rs Linux 6.19-rc7 2026-01-26 13:23:52 +01:00
bitmap.rs rust: bitmap: add BitmapVec::new_inline() 2025-11-26 11:25:35 -05:00
bits.rs rust: bits: always inline functions using build_assert with arguments 2026-01-18 20:40:11 +01:00
block.rs rust: block: add block related constants 2025-09-02 05:23:56 -06:00
bug.rs rust: bug: Support DEBUG_BUGVERBOSE_DETAILED option 2026-01-30 05:18:17 +01:00
build_assert.rs rust: build_assert: add instructions for use with function arguments 2026-01-19 01:13:22 +01:00
clk.rs rust: clk: replace kernel::c_str! with C-Strings 2026-01-30 01:08:24 +01:00
configfs.rs rust: configfs: replace kernel::c_str! with C-Strings 2026-01-15 09:26:49 +01:00
cpu.rs rust: kernel: cpu: mark CpuId::current() inline 2025-09-14 23:58:45 +02:00
cpufreq.rs rust: cpufreq: replace kernel::c_str! with C-Strings 2026-01-27 11:21:22 +05:30
cpumask.rs rust: cpumask: rename methods of Cpumask for clarity and consistency 2026-01-27 11:21:23 +05:30
cred.rs Char/Misc/IIO/Binder changes for 6.18-rc1 2025-10-04 16:26:32 -07:00
debugfs.rs rust: debugfs: Use kernel Atomic type in docs example 2026-01-19 15:02:46 +01:00
device.rs Linux 6.19-rc7 2026-01-26 13:23:52 +01:00
device_id.rs rust: device_id: replace incorrect word in safety documentation 2025-12-29 14:09:18 +01:00
devres.rs rust: devres: fix race condition due to nesting 2026-02-07 01:03:49 +01:00
dma.rs rust: dma: allow drivers to tune max segment size 2026-01-28 16:53:24 +01:00
driver.rs Linux 6.19-rc7 2026-01-26 13:23:52 +01:00
error.rs rust: replace CStr with core::ffi::CStr 2025-10-22 07:47:27 +02:00
faux.rs rust: faux: use "kernel vertical" style for imports 2026-01-07 19:56:00 +01:00
firmware.rs rust: firmware: replace kernel::c_str! with C-Strings 2025-11-17 00:53:47 +01:00
fmt.rs rust: fmt: Fix grammar in Adapter description 2026-01-04 23:51:35 +01:00
fs.rs rust: fs: add Kiocb struct 2025-09-06 13:27:20 +02:00
generated_arch_reachable_asm.rs.S rust: Add warn_on macro 2025-07-23 02:05:58 +02:00
generated_arch_static_branch_asm.rs.S
generated_arch_warn_asm.rs.S rust: Add warn_on macro 2025-07-23 02:05:58 +02:00
i2c.rs Rust changes for v6.20 / v7.0 2026-02-10 11:53:01 -08:00
id_pool.rs rust: id_pool: do not immediately acquire new ids 2025-12-02 14:17:09 -05:00
impl_flags.rs rust: add impl_flags! macro for defining common bitflag operations 2026-02-02 08:09:11 +01:00
init.rs rust: init: use #[default_error(err)] for the initializer macros 2026-01-17 10:51:42 +01:00
io.rs rust: io: macro_export io_define_read!() and io_define_write!() 2026-02-23 00:54:02 +01:00
ioctl.rs
iov.rs rust: iov: add iov_iter abstractions for ITER_DEST 2025-09-06 13:27:20 +02:00
irq.rs rust: irq: add support for threaded IRQs and handlers 2025-08-12 20:22:09 +02:00
jump_label.rs
kunit.rs rust: kunit: use pin_init::zeroed instead of custom null value 2026-01-28 13:44:17 +01:00
lib.rs Driver core changes for 7.0-rc1 2026-02-11 17:43:59 -08:00
list.rs rust: list: add warning to List::remove docs about mem::take 2025-11-26 13:26:59 +01:00
maple_tree.rs rust: maple_tree: rcu_read_lock() in destructor to silence lockdep 2025-12-23 11:23:15 -08:00
miscdevice.rs rust: redefine bindings::compat_ptr_ioctl in Rust 2026-01-16 14:54:11 +01:00
mm.rs rust: mm: update ARef and AlwaysRefCounted imports from sync::aref 2025-09-13 16:55:15 -07:00
module_param.rs Modules changes for v6.19-rc1 2025-12-06 08:27:07 -08:00
net.rs
num.rs rust: num: add Bounded integer wrapping type 2025-11-19 00:22:24 +01:00
of.rs rust: of: use core::ffi::CStr method names 2025-09-16 09:26:59 +02:00
opp.rs Rust changes for v6.19 2025-12-03 14:16:49 -08:00
page.rs rust: Return Option from page_align and ensure no usize overflow 2025-12-29 15:32:53 +01:00
pci.rs rust: pci: re-export ConfigSpace 2026-02-01 22:18:24 +01:00
pid_namespace.rs rust: pid_namespace: update AlwaysRefCounted imports from sync::aref 2025-08-19 13:08:41 +02:00
platform.rs Linux 6.19-rc7 2026-01-26 13:23:52 +01:00
prelude.rs drm-next for 6.19-rc1: 2025-12-04 08:53:30 -08:00
print.rs rust: print: Add pr_*_once macros 2026-01-30 05:47:05 +01:00
processor.rs rust: Add cpu_relax() helper 2025-08-21 16:58:07 +02:00
ptr.rs rust: ptr: replace unneeded use of build_assert 2026-01-19 01:13:22 +01:00
pwm.rs rust: pwm: Simplify to_result call sites and unsafe blocks 2026-01-20 18:49:58 +01:00
rbtree.rs Rust changes for v6.20 / v7.0 2026-02-10 11:53:01 -08:00
regulator.rs rust: regulator: replace kernel::c_str! with C-Strings 2025-12-22 14:52:12 +00:00
revocable.rs Rust changes for v6.17 2025-08-03 13:49:10 -07:00
safety.rs rust: safety: introduce unsafe_precondition_assert! macro 2026-02-02 08:10:48 +01:00
scatterlist.rs rust: scatterlist: Update ARef imports to use sync::aref 2025-12-18 17:25:45 +01:00
security.rs rust_binder: add Rust Binder driver 2025-09-19 09:40:46 +02:00
seq_file.rs rust: seq_file: replace kernel::c_str! with C-Strings 2026-01-29 15:32:40 +01:00
sizes.rs rust: sizes: add constants up to SZ_2G 2025-06-23 18:12:30 +02:00
slice.rs rust: slice: fix broken intra-doc links 2025-11-20 10:13:35 +00:00
soc.rs rust: Add soc_device support 2025-12-28 12:43:56 +01:00
static_assert.rs rust: use absolute paths in macros referencing core and kernel 2025-05-23 00:12:14 +02:00
std_vendor.rs rust: convert raw URLs to Markdown autolinks in comments 2025-05-12 00:20:25 +02:00
str.rs Modules changes for v6.19-rc1 2025-12-06 08:27:07 -08:00
sync.rs rust: sync: Replace kernel::c_str! with C-Strings 2026-01-28 09:25:44 +01:00
task.rs rust: task: restrict Task::group_leader() to current 2026-01-26 19:07:13 -08:00
time.rs rust: time: Implement basic arithmetic operations for Delta 2025-09-04 16:56:48 +02:00
tracepoint.rs
transmute.rs rust: transmute: implement FromBytes and AsBytes for inhabited ZSTs 2026-01-26 03:16:31 +01:00
types.rs rust: allow clippy::disallowed_names for doctests 2025-11-17 22:53:27 +01:00
uaccess.rs rust: uaccess: add UserSliceWriter::write_slice_file() 2025-11-05 00:35:37 +01:00
usb.rs USB / Thunderbolt changes for 7.0-rc1 2026-02-17 09:36:43 -08:00
workqueue.rs rust: pin-init: add pin projections to #[pin_data] 2025-09-11 23:26:20 +02:00
xarray.rs rust: types: add FOREIGN_ALIGN to ForeignOwnable 2025-07-14 23:55:24 +02:00