Changes in mem.rs

5a12cbf26134d417531289e89375bbe580803dec - rust: missed rustfmt fix up in rust/kernel/mem.rs

Thu, 22 Oct 2026 19:03:40 +0200

rust: missed rustfmt fix up in rust/kernel/mem.rsMiguel had mentioned this rustfmt issue, but I overlooked this one whendoing the driver core merge.Make rustfmt happy again.Reminded-by: Miguel Ojeda Signed-off-by: Linus Torvalds List of files: /linux/rust/kernel/mem.rs

7be4bc52fd9e0e55dc9a2e0232b89427d2c4b614 - Merge tag 'driver-core-7.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core

Thu, 22 Oct 2026 06:53:14 +0200

Merge tag 'driver-core-7.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-corePull 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 ... List of files: /linux/rust/kernel/mem.rs

948440b3f429f84680db58b4bf529b1ed2a20e15 - rust: mem: add `Align` type

Wed, 10 Jun 2026 13:42:22 +0200

rust: mem: add `Align` typeRust's `repr(align())` only works with integers. Add an `Align` type so itcan also be specified via const generics.Signed-off-by: Gary Guo Reviewed-by: Andreas Hindborg 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 List of files: /linux/rust/kernel/mem.rs

ef605a433d80987e97fcf62a41bdf437abc61e2c - rust: mem: add `AsRepr` and `AsReprMut`

Tue, 01 Sep 2026 18:50:27 +0200

rust: mem: add `AsRepr` and `AsReprMut`Some API like atomics and I/O operate on primitives only; therefore othertypes would need to converted to these primitive first. Add two traits`AsRepr` and `AsReprMut` to indicate that the type can be turned into aprimitive for these operations.`T: AsRepr` means that `&T` can be viewed as `&T::Repr` and thus it needsto support transmutability in one direction. `T: AsReprMut` means that`&mut T` can be viewed as `&mut T::Repr` and thus it needs to supportbi-directional transmutability.To avoid duplicating implementations, all repr types are normalized tounsigned integers.Signed-off-by: Gary Guo Reviewed-by: Alexandre Courbot Tested-by: Alexandre Courbot Acked-by: Miguel Ojeda 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 List of files: /linux/rust/kernel/mem.rs

1fc1f82756b1ff872c04950747925f7dcf5c1d8a - rust: mem: add `transmute` with deferred size check

Tue, 01 Sep 2026 18:50:26 +0200

rust: mem: add `transmute` with deferred size checkImplement a `transmute/safe_transmute` that checks size atmonomorphization time instead of type-checking time. This allows more caseswhere we know that the size matches but this is not generically checkable.The signature is equivalent to the unstable `transmute_neo` function in thestandard 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 Reviewed-by: Alexandre Courbot Tested-by: Alexandre Courbot Acked-by: Miguel Ojeda 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 List of files: /linux/rust/kernel/mem.rs