From: "Danilo Krummrich" <dakr@kernel.org>
To: "Linus Torvalds" <torvalds@linux-foundation.org>
Cc: "Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
"Rafael J. Wysocki" <rafael@kernel.org>,
"Saravana Kannan" <saravanak@kernel.org>,
"Andrew Morton" <akpm@linux-foundation.org>,
<driver-core@lists.linux.dev>, <rust-for-linux@vger.kernel.org>,
<linux-kernel@vger.kernel.org>
Subject: [GIT PULL] Driver core changes for 7.1-rc1
Date: Sat, 11 Apr 2026 02:24:24 +0200 [thread overview]
Message-ID: <DHPWC2SXSROE.1RM1PTZNOC627@kernel.org> (raw)
Hi Linus,
Please pull these driver-core changes.
All commits have been in linux-next for at least five rounds; expect a minor
conflict with the Rust tree due to the minimum compiler version bump.
A struct platform_device_info change and the addition of a conditional guard for
the device lock have been shared with various trees through a signed tag; the
Rust I/O register!() macro addition has been shared with the DRM tree.
A few late-cycle fixes still need some soak time in linux-next; please expect a
follow-up PR in the middle of the merge window.
- Danilo
The following changes since commit c369299895a591d96745d6492d4888259b004a9e:
Linux 7.0-rc5 (2026-03-22 14:42:17 -0700)
are available in the Git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core.git tags/driver-core-7.1-rc1
for you to fetch changes up to 6c8dfb0362732bf1e4829867a2a5239fedc592d0:
bus: fsl-mc: use generic driver_override infrastructure (2026-04-04 20:41:25 +0200)
----------------------------------------------------------------
Driver core changes for 7.1-rc1
- debugfs:
- Fix NULL pointer dereference in debugfs_create_str()
- Fix misplaced EXPORT_SYMBOL_GPL for debugfs_create_str()
- Fix soundwire debugfs NULL pointer dereference from uninitialized
firmware_file
- device property:
- Make fwnode flags modifications thread safe; widen the field to
unsigned long and use set_bit() / clear_bit() based accessors
- Document how to check for the property presence
- devres:
- Separate struct devres_node from its "subclasses" (struct devres,
struct devres_group); give struct devres_node its own release and
free callbacks for per-type dispatch
- Introduce struct devres_action for devres actions, avoiding the
ARCH_DMA_MINALIGN alignment overhead of struct devres
- Export struct devres_node and its init/add/remove/dbginfo
primitives for use by Rust Devres<T>
- Fix missing node debug info in devm_krealloc()
- Use guard(spinlock_irqsave) where applicable; consolidate unlock
paths in devres_release_group()
- driver_override:
- Convert PCI, WMI, vdpa, s390/cio, s390/ap, and fsl-mc to the
generic driver_override infrastructure, replacing per-bus
driver_override strings, sysfs attributes, and match logic; fixes
a potential UAF from unsynchronized access to driver_override in
bus match() callbacks
- Simplify __device_set_driver_override() logic
- kernfs:
- Send IN_DELETE_SELF and IN_IGNORED inotify events on kernfs
file and directory removal
- Add corresponding selftests for memcg
- platform:
- Allow attaching software nodes when creating platform devices via
a new 'swnode' field in struct platform_device_info
- Add kerneldoc for struct platform_device_info
- software node:
- Move software node initialization from postcore_initcall() to
driver_init(), making it available early in the boot process
- Move kernel_kobj initialization (ksysfs_init) earlier to support
the above
- Remove software_node_exit(); dead code in a built-in unit
- SoC:
- Introduce of_machine_read_compatible() and of_machine_read_model()
OF helpers and export soc_attr_read_machine() to replace direct
accesses to of_root from SoC drivers; also enables
CONFIG_COMPILE_TEST coverage for these drivers
- sysfs:
- Constify attribute group array pointers to
'const struct attribute_group *const *' in sysfs functions,
device_add_groups() / device_remove_groups(), and struct class
- Rust:
- Devres:
- Embed struct devres_node directly in Devres<T> instead of going
through devm_add_action(), avoiding the extra allocation and
the unnecessary ARCH_DMA_MINALIGN alignment
- I/O:
- Turn IoCapable from a marker trait into a functional trait
carrying the raw I/O accessor implementation (io_read /
io_write), providing working defaults for the per-type Io
methods
- Add RelaxedMmio wrapper type, making relaxed accessors usable
in code generic over the Io trait
- Remove overloaded per-type Io methods and per-backend macros
from Mmio and PCI ConfigSpace
- I/O (Register):
- Add IoLoc trait and generic read/write/update methods to the Io
trait, making I/O operations parameterizable by typed locations
- Add register! macro for defining hardware register types with
typed bitfield accessors backed by Bounded values; supports
direct, relative, and array register addressing
- Add write_reg() / try_write_reg() and LocatedRegister trait
- Update PCI sample driver to demonstrate the register! macro
Example:
```
register! {
/// UART control register.
CTRL(u32) @ 0x18 {
/// Receiver enable.
19:19 rx_enable => bool;
/// Parity configuration.
14:13 parity ?=> Parity;
}
/// FIFO watermark and counter register.
WATER(u32) @ 0x2c {
/// Number of datawords in the receive FIFO.
26:24 rx_count;
/// RX interrupt threshold.
17:16 rx_water;
}
}
impl WATER {
fn rx_above_watermark(&self) -> bool {
self.rx_count() > self.rx_water()
}
}
fn init(bar: &pci::Bar<BAR0_SIZE>) {
let water = WATER::zeroed()
.with_const_rx_water::<1>(); // > 3 would not compile
bar.write_reg(water);
let ctrl = CTRL::zeroed()
.with_parity(Parity::Even)
.with_rx_enable(true);
bar.write_reg(ctrl);
}
fn handle_rx(bar: &pci::Bar<BAR0_SIZE>) {
if bar.read(WATER).rx_above_watermark() {
// drain the FIFO
}
}
fn set_parity(bar: &pci::Bar<BAR0_SIZE>, parity: Parity) {
bar.update(CTRL, |r| r.with_parity(parity));
}
```
- IRQ:
- Move 'static bounds from where clauses to trait declarations
for IRQ handler traits
- Misc:
- Enable the generic_arg_infer Rust feature
- Extend Bounded with shift operations, single-bit bool conversion,
and const get()
- Misc:
- Make deferred_probe_timeout default a Kconfig option
- Drop auxiliary_dev_pm_ops; the PM core falls back to driver PM
callbacks when no bus type PM ops are set
- Add conditional guard support for device_lock()
- Add ksysfs.c to the DRIVER CORE MAINTAINERS entry
- Fix kernel-doc warnings in base.h
- Fix stale reference to memory_block_add_nid() in documentation
----------------------------------------------------------------
Alexandre Courbot (15):
rust: io: turn IoCapable into a functional trait
rust: io: mem: use non-relaxed I/O ops in examples
rust: io: provide Mmio relaxed ops through a wrapper type
rust: io: remove legacy relaxed accessors of Mmio
rust: pci: io: remove overloaded Io methods of ConfigSpace
rust: io: remove overloaded Io methods of Mmio
rust: enable the `generic_arg_infer` feature
rust: num: add `shr` and `shl` methods to `Bounded`
rust: num: add `into_bool` method to `Bounded`
rust: num: make Bounded::get const
rust: io: add IoLoc type and generic I/O accessors
rust: io: use generic read/write accessors for primitive accesses
rust: io: add `register!` macro
rust: io: introduce `write_reg` and `LocatedRegister`
sample: rust: pci: use `register!` macro
Alice Ryhl (1):
rust: irq: move 'static bounds to traits
Andy Shevchenko (1):
device property: Document how to check for the property presence
Bartosz Golaszewski (12):
of: provide of_machine_read_compatible()
of: provide of_machine_read_model()
base: soc: order includes alphabetically
base: soc: rename and export soc_device_get_machine()
soc: fsl: guts: don't access of_root directly
soc: imx8m: don't access of_root directly
soc: imx9: don't access of_root directly
soc: sunxi: mbus: don't access of_root directly
MAINTAINERS: add ksysfs.c to the DRIVER CORE entry
kernel: ksysfs: initialize kernel_kobj earlier
software node: remove software_node_exit()
driver core: make software nodes available earlier
Dan Williams (1):
device core: Fix kernel-doc warnings in base.h
Danilo Krummrich (22):
Merge tag 'v7.0-rc3' into driver-core-next
Merge tag 'device_lock_cond_guard-7.1-rc1' into driver-core-testing
Merge tag 'rust_io-7.1-rc1' into driver-core-next
devres: fix missing node debug info in devm_krealloc()
devres: add devres_node_add()
devres: add devres_node_init()
devres: don't require ARCH_DMA_MINALIGN for devres actions
devres: add free_node callback to struct devres_node
devres: use guard(spinlock_irqsave) where applicable
devres: remove unnecessary unlocks in devres_release_group()
devres: move struct devres_node into base.h
devres: export devres_node_init() and devres_node_add()
devres: add devres_node_remove()
devres: rename and export set_node_dbginfo()
rust: devres: embed struct devres_node directly
Merge tag 'v7.0-rc5' into driver-core-next
PCI: use generic driver_override infrastructure
platform/wmi: use generic driver_override infrastructure
vdpa: use generic driver_override infrastructure
s390/cio: use generic driver_override infrastructure
s390/ap: use generic driver_override infrastructure
bus: fsl-mc: use generic driver_override infrastructure
Dmitry Torokhov (3):
driver core: platform: add kerneldoc to struct platform_device_info
driver core: platform: allow attaching software nodes when creating devices
driver core: platform: fix various formatting issues
Douglas Anderson (1):
device property: Make modifications of fwnode "flags" thread safe
Gui-Dong Han (4):
driver core: simplify __device_set_driver_override() clearing logic
debugfs: check for NULL pointer in debugfs_create_str()
debugfs: fix placement of EXPORT_SYMBOL_GPL for debugfs_create_str()
soundwire: debugfs: initialize firmware_file to empty string
Hans de Goede (1):
driver core: Make deferred_probe_timeout default a Kconfig option
Heiner Kallweit (3):
sysfs: constify group arrays in function arguments
driver: core: constify groups array argument in device_add_groups and device_remove_groups
driver core: make struct class groups members constant arrays
Kexin Sun (1):
drivers/base/memory: fix stale reference to memory_block_add_nid()
Li Ming (1):
driver core: Add conditional guard support for device_lock()
Rafael J. Wysocki (1):
driver core: auxiliary bus: Drop auxiliary_dev_pm_ops
T.J. Mercier (4):
kernfs: Don't set_nlink for directories being removed
kernfs: Send IN_DELETE_SELF and IN_IGNORED
selftests: memcg: Add tests for IN_DELETE_SELF and IN_IGNORED
kernfs: Add missing documentation for kernfs_put_active's drop_supers argument
MAINTAINERS | 2 +
drivers/base/Kconfig | 9 +
drivers/base/auxiliary.c | 6 -
drivers/base/base.h | 98 ++++----
drivers/base/core.c | 29 +--
drivers/base/dd.c | 52 ++---
drivers/base/devres.c | 277 ++++++++++++++--------
drivers/base/init.c | 1 +
drivers/base/memory.c | 2 +-
drivers/base/platform.c | 58 ++---
drivers/base/property.c | 14 +-
drivers/base/soc.c | 23 +-
drivers/base/swnode.c | 13 +-
drivers/bus/fsl-mc/fsl-mc-bus.c | 43 +---
drivers/bus/imx-weim.c | 2 +-
drivers/i2c/i2c-core-of.c | 2 +-
drivers/net/phy/mdio_bus_provider.c | 4 +-
drivers/of/base.c | 30 ++-
drivers/of/dynamic.c | 2 +-
drivers/of/platform.c | 2 +-
drivers/pci/pci-driver.c | 11 +-
drivers/pci/pci-sysfs.c | 28 ---
drivers/pci/probe.c | 1 -
drivers/platform/wmi/core.c | 36 +--
drivers/s390/cio/cio.h | 5 -
drivers/s390/cio/css.c | 34 +--
drivers/s390/crypto/ap_bus.c | 34 +--
drivers/s390/crypto/ap_bus.h | 1 -
drivers/s390/crypto/ap_queue.c | 24 +-
drivers/soc/fsl/guts.c | 12 +-
drivers/soc/imx/soc-imx8m.c | 11 +-
drivers/soc/imx/soc-imx9.c | 4 +-
drivers/soc/sunxi/sunxi_mbus.c | 2 +-
drivers/soundwire/debugfs.c | 9 +-
drivers/spi/spi.c | 2 +-
drivers/vdpa/vdpa.c | 48 +---
drivers/vfio/fsl-mc/vfio_fsl_mc.c | 4 +-
drivers/vfio/pci/vfio_pci_core.c | 5 +-
drivers/xen/xen-pciback/pci_stub.c | 6 +-
fs/debugfs/file.c | 7 +-
fs/kernfs/dir.c | 58 ++++-
fs/kernfs/inode.c | 2 +-
fs/sysfs/group.c | 10 +-
include/linux/device.h | 5 +-
include/linux/device/class.h | 4 +-
include/linux/fsl/mc.h | 4 -
include/linux/fwnode.h | 44 +++-
include/linux/ksysfs.h | 8 +
include/linux/of.h | 14 ++
include/linux/pci.h | 6 -
include/linux/platform_device.h | 58 ++++-
include/linux/sys_soc.h | 10 +
include/linux/sysfs.h | 16 +-
include/linux/vdpa.h | 4 -
include/linux/wmi.h | 4 -
init/main.c | 2 +
kernel/ksysfs.c | 9 +-
rust/kernel/devres.rs | 187 +++++++++++----
rust/kernel/io.rs | 780 ++++++++++++++++++++++++++++++++++++++------------------------
rust/kernel/io/mem.rs | 10 +-
rust/kernel/io/register.rs | 1260 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
rust/kernel/irq/request.rs | 28 +--
rust/kernel/lib.rs | 3 +
rust/kernel/num/bounded.rs | 70 +++++-
rust/kernel/pci/io.rs | 99 +++-----
samples/rust/rust_driver_pci.rs | 90 ++++++--
scripts/Makefile.build | 3 +-
tools/testing/selftests/cgroup/test_memcontrol.c | 112 +++++++++
68 files changed, 2839 insertions(+), 1014 deletions(-)
create mode 100644 include/linux/ksysfs.h
create mode 100644 rust/kernel/io/register.rs
reply other threads:[~2026-04-11 0:24 UTC|newest]
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