rust: missed rustfmt fix up in rust/kernel/mem.rs

Miguel had mentioned this rustfmt issue, but I overlooked this one when
doing the driver core merge.

Make rustfmt happy again.

Reminded-by: Miguel

rust: missed rustfmt fix up in rust/kernel/mem.rs

Miguel had mentioned this rustfmt issue, but I overlooked this one when
doing the driver core merge.

Make rustfmt happy again.

Reminded-by: Miguel Ojeda <ojeda@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

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Merge tag 'driver-core-7.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core

Pull driver core updates from Danilo Krummrich:
"Core:

- Add TAINT_FORCED_BIND to taint

Merge tag 'driver-core-7.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core

Pull driver core updates from Danilo Krummrich:
"Core:

- Add TAINT_FORCED_BIND to taint the kernel and driver module before
manual sysfs bind/unbind operations; make add_taint_module()
available to driver core and update taint decoding tools and
documentation

- Constify device_show/store_*() attribute parameters and adapt x86
MCE and perf users to prepare for const dev_ext_attribute instances

- Fix UAF in NUMA access node registration failure handling by
dropping the device reference with put_device() instead of directly
freeing the node

debugfs:

- Make debugfs_create_str() read-only to eliminate double-free races
between concurrent writers; reject writable modes; convert
interconnect and SoundWire users to local file operations with
mutex-protected strings

kobject:

- Fix out-of-bounds access in kobject_action_type() when parsing
action strings containing embedded NUL bytes

- Fix the kobject_set_name() reference in kset_register() kernel-doc

Rust:

- DMA:

- Tie Coherent, CoherentBox and CoherentHandle to the device's
bound lifetime to prevent retaining DMA allocations beyond
driver unbind; propagate the lifetime through nova-core and the
DMA sample driver

- I/O:

- Require explicit base types for registers and replace relative
registers with typed subregion projections; reimplement
register!() as a proc macro, support registers using existing
types without inline bitfields, and convert nova-core, Tyr and
the PCI sample; add AsRepr/AsReprMut and transmute helpers with
deferred size checks for representation conversions

- Wrap ResourceSize in a transparent newtype with explicit
conversions, including checked conversion to usize

- PCI:

- Add typed PCIe extended capability lookup and SR-IOV accessors
for the First VF Offset and decoded VF BAR addresses and widths,
keeping raw SR-IOV registers private to preserve PCI core
ownership of their state

- scatterlist:

- Honor the device's maximum segment size as well as the DMA
mapping limit when constructing SG tables

- Return u32 from SGEntry::dma_len() to match the C segment length
type

- misc:

- Validate auxiliary DeviceId name length explicitly to improve
compile-time diagnostics for oversized device ID table entries

- Drop unnecessary 'static bounds from debugfs ScopedDir file
creation methods to support data containing non-'static
references, including DMA buffers

Misc:

- Add Johan Hovold as driver core maintainer

- Simplify platform_device_alloc() by returning early on allocation
failure

- Fix typos in driver core and kernfs comments"

* tag 'driver-core-7.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core: (41 commits)
rust: pci: add extended capability and SR-IOV support
kobject: Fix the kobj_set_name reference in kset_register() kernel-doc
rust: io: convert ResourceSize into a transparent newtype
rust: scatterlist: return u32 from SGEntry::dma_len()
MAINTAINERS: add myself as driver core maintainer
debugfs: make debugfs_create_str() read-only
soundwire: debugfs: replace writable string helper
interconnect: debugfs: replace writable string helper
docs: admin-guide: Handle TAINT_FORCED_BIND when parsing /proc/sys/kernel/tainted
driver core: platform: Simplify platform_device_alloc()
kobject: fix out-of-bounds access in kobject_action_type()
rust: scatterlist: honor the device's maximum segment size
driver core: add TAINT_FORCED_BIND for when userspace manually messes with devices and drivers
module: fix up documentation for add_taint() and add_taint_module()
module: pull out add_taint_module() to be public
driver core: Constify the signature of device_show/store_*()
drivers: perf: Use __DEVICE_ATTR() macro to initialize dev_ext_attribute
x86/mce: Use __DEVICE_ATTR() macro to initialize dev_ext_attribute
rust: auxiliary: validate DeviceId name length
driver core: fix typos in comments
...

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rust: mem: add `Align` type

Rust's `repr(align())` only works with integers. Add an `Align` type so it
can also be specified via const generics.

Signed-off-by: Gary Guo <gary@garyguo.net>
Reviewed-

rust: mem: add `Align` type

Rust's `repr(align())` only works with integers. Add an `Align` type so it
can also be specified via const generics.

Signed-off-by: Gary Guo <gary@garyguo.net>
Reviewed-by: Andreas Hindborg <a.hindborg@kernel.org>
Link: https://patch.msgid.link/20260610-const-align-v2-1-ccd12f0aedb7@garyguo.net
[ Adjusted the title of the new module to match the one used in patch
"rust: mem: add `transmute` with deferred size check" (landing via
driver-core), which is also closer to the upstream standard library
title. - Miguel ]
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>

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rust: mem: add `AsRepr` and `AsReprMut`

Some API like atomics and I/O operate on primitives only; therefore other
types would need to converted to these primitive first. Add two traits
`AsRepr` and

rust: mem: add `AsRepr` and `AsReprMut`

Some API like atomics and I/O operate on primitives only; therefore other
types would need to converted to these primitive first. Add two traits
`AsRepr` and `AsReprMut` to indicate that the type can be turned into a
primitive for these operations.

`T: AsRepr` means that `&T` can be viewed as `&T::Repr` and thus it needs
to support transmutability in one direction. `T: AsReprMut` means that
`&mut T` can be viewed as `&mut T::Repr` and thus it needs to support
bi-directional transmutability.

To avoid duplicating implementations, all repr types are normalized to
unsigned integers.

Signed-off-by: Gary Guo <gary@garyguo.net>
Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>
Tested-by: Alexandre Courbot <acourbot@nvidia.com>
Acked-by: Miguel Ojeda <ojeda@kernel.org>
Link: https://patch.msgid.link/20260901-typed_register-v4-3-5552b1d59525@garyguo.net
[ Fix grammar in from_repr_unchecked() documentation, rephrase confusing
safety comment, use rustdoc links for Self, fix backtick formatting in
comments and use consistent 'must' wording in safety sections.
- Danilo ]
Signed-off-by: Danilo Krummrich <dakr@kernel.org>

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rust: mem: add `transmute` with deferred size check

Implement a `transmute/safe_transmute` that checks size at
monomorphization time instead of type-checking time. This allows more cases
where we kn

rust: mem: add `transmute` with deferred size check

Implement a `transmute/safe_transmute` that checks size at
monomorphization time instead of type-checking time. This allows more cases
where we know that the size matches but this is not generically checkable.

The signature is equivalent to the unstable `transmute_neo` function in the
standard library. A safe variant is provided to use with types implementing
`FromBytes` and `IntoBytes`.

Existing users of `transmute_copy` to bypass size checks are converted.

Signed-off-by: Gary Guo <gary@garyguo.net>
Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>
Tested-by: Alexandre Courbot <acourbot@nvidia.com>
Acked-by: Miguel Ojeda <ojeda@kernel.org>
Link: https://patch.msgid.link/20260901-typed_register-v4-2-5552b1d59525@garyguo.net
[ Fix doc heading to use plural "Examples", add missing closing code
block delimiter and fix a few other nits. - Danilo ]
Signed-off-by: Danilo Krummrich <dakr@kernel.org>

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