The current name of `as_ptr` is very generic, and if you attempt to invoke `foo.as_ptr()` on a type for which this method is missing, then an error along these lines will be printed:

error[E0599]: no method named `as_ptr` found for reference `&DmaBuf` in the current scope --> linux/rust/kernel/dma_buf/buf.rs:54:38 | 54 | ptr::eq(self.as_ptr(), other.as_ptr()) | ^^^^^^ method not found in `&DmaBuf` | = help: items from traits can only be used if the trait is implemented and in scope note: `device_id::IdTable` defines an item `as_ptr`, perhaps you need to implement it --> linux/rust/kernel/device_id.rs:165:1 | 165 | pub trait IdTable<T: RawDeviceId, U> { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Suggesting the IdTable trait when an as_ptr() method is missing is not useful. Renaming it to `as_raw_id_table` makes the method name unique to this trait and avoids these bad suggestions.

Assisted-by: Antigravity:Gemini Signed-off-by: Alice Ryhl aliceryhl@google.com --- rust/kernel/auxiliary.rs | 2 +- rust/kernel/device_id.rs | 4 ++-- rust/kernel/driver.rs | 8 +++++--- rust/kernel/i2c.rs | 8 ++++---- rust/kernel/pci.rs | 2 +- rust/kernel/platform.rs | 4 ++-- rust/kernel/usb.rs | 2 +- 7 files changed, 16 insertions(+), 14 deletions(-)

diff --git a/rust/kernel/auxiliary.rs b/rust/kernel/auxiliary.rs index c42928d5a239..fd6940577e0d 100644 --- a/rust/kernel/auxiliary.rs +++ b/rust/kernel/auxiliary.rs @@ -64,7 +64,7 @@ unsafe fn register( (*adrv.get()).name = name.as_char_ptr(); (*adrv.get()).probe = Some(Self::probe_callback); (*adrv.get()).remove = Some(Self::remove_callback); - (*adrv.get()).id_table = T::ID_TABLE.as_ptr(); + (*adrv.get()).id_table = T::ID_TABLE.as_raw_id_table(); }

// SAFETY: `adrv` is guaranteed to be a valid `DriverType`. diff --git a/rust/kernel/device_id.rs b/rust/kernel/device_id.rs index 8e9721446014..821da02540b1 100644 --- a/rust/kernel/device_id.rs +++ b/rust/kernel/device_id.rs @@ -164,7 +164,7 @@ impl<T: RawDeviceId + RawDeviceIdIndex, U, const N: usize> IdArray<T, U, N> { /// `IdArray` doesn't matter. pub trait IdTable<T: RawDeviceId, U> { /// Obtain the pointer to the ID table. - fn as_ptr(&self) -> *const T::RawType; + fn as_raw_id_table(&self) -> *const T::RawType;

/// Obtain the pointer to the bus specific device ID from an index. fn id(&self, index: usize) -> &T::RawType; @@ -174,7 +174,7 @@ pub trait IdTable<T: RawDeviceId, U> { }

impl<T: RawDeviceId, U, const N: usize> IdTable<T, U> for IdArray<T, U, N> { - fn as_ptr(&self) -> *const T::RawType { + fn as_raw_id_table(&self) -> *const T::RawType { // This cannot be `self.ids.as_ptr()`, as the return pointer must have correct provenance // to access the sentinel. core::ptr::from_ref(self).cast() diff --git a/rust/kernel/driver.rs b/rust/kernel/driver.rs index bf5ba0d27553..69068adcbdae 100644 --- a/rust/kernel/driver.rs +++ b/rust/kernel/driver.rs @@ -341,7 +341,8 @@ fn acpi_id_info(dev: &device::Device) -> Option<&'static Self::IdInfo> { // SAFETY: // - `table` has static lifetime, hence it's valid for read, // - `dev` is guaranteed to be valid while it's alive, and so is `dev.as_raw()`. - let raw_id = unsafe { bindings::acpi_match_device(table.as_ptr(), dev.as_raw()) }; + let raw_id = + unsafe { bindings::acpi_match_device(table.as_raw_id_table(), dev.as_raw()) };

if raw_id.is_null() { None @@ -374,7 +375,8 @@ fn of_id_info(dev: &device::Device) -> Option<&'static Self::IdInfo> { // SAFETY: // - `table` has static lifetime, hence it's valid for read, // - `dev` is guaranteed to be valid while it's alive, and so is `dev.as_raw()`. - let raw_id = unsafe { bindings::of_match_device(table.as_ptr(), dev.as_raw()) }; + let raw_id = + unsafe { bindings::of_match_device(table.as_raw_id_table(), dev.as_raw()) };

if !raw_id.is_null() { // SAFETY: `DeviceId` is a `#[repr(transparent)]` wrapper of `struct of_device_id` @@ -404,7 +406,7 @@ fn of_id_info(dev: &device::Device) -> Option<&'static Self::IdInfo> { // - `adev` is a valid pointer to `acpi_device` or is null. It is guaranteed to be // valid as long as `dev` is alive. // - `table` has static lifetime, hence it's valid for read. - if unsafe { acpi_of_match_device(adev, table.as_ptr(), &raw mut raw_id) } { + if unsafe { acpi_of_match_device(adev, table.as_raw_id_table(), &raw mut raw_id) } { // SAFETY: // - the function returns true, therefore `raw_id` has been set to a pointer to a // valid `of_device_id`. diff --git a/rust/kernel/i2c.rs b/rust/kernel/i2c.rs index 624b971ca8b0..920794d4089d 100644 --- a/rust/kernel/i2c.rs +++ b/rust/kernel/i2c.rs @@ -116,17 +116,17 @@ unsafe fn register( );

let i2c_table = match T::I2C_ID_TABLE { - Some(table) => table.as_ptr(), + Some(table) => table.as_raw_id_table(), None => core::ptr::null(), };

let of_table = match T::OF_ID_TABLE { - Some(table) => table.as_ptr(), + Some(table) => table.as_raw_id_table(), None => core::ptr::null(), };

let acpi_table = match T::ACPI_ID_TABLE { - Some(table) => table.as_ptr(), + Some(table) => table.as_raw_id_table(), None => core::ptr::null(), };

@@ -208,7 +208,7 @@ fn i2c_id_info(dev: &I2cClient) -> Option<&'static <Self as driver::Adapter>::Id // SAFETY: // - `table` has static lifetime, hence it's valid for reads // - `dev` is guaranteed to be valid while it's alive, and so is `dev.as_raw()`. - let raw_id = unsafe { bindings::i2c_match_id(table.as_ptr(), dev.as_raw()) }; + let raw_id = unsafe { bindings::i2c_match_id(table.as_raw_id_table(), dev.as_raw()) };

if raw_id.is_null() { return None; diff --git a/rust/kernel/pci.rs b/rust/kernel/pci.rs index 5071cae6543f..311b4716800b 100644 --- a/rust/kernel/pci.rs +++ b/rust/kernel/pci.rs @@ -81,7 +81,7 @@ unsafe fn register( (*pdrv.get()).name = name.as_char_ptr(); (*pdrv.get()).probe = Some(Self::probe_callback); (*pdrv.get()).remove = Some(Self::remove_callback); - (*pdrv.get()).id_table = T::ID_TABLE.as_ptr(); + (*pdrv.get()).id_table = T::ID_TABLE.as_raw_id_table(); }

// SAFETY: `pdrv` is guaranteed to be a valid `DriverType`. diff --git a/rust/kernel/platform.rs b/rust/kernel/platform.rs index 9b362e0495d3..f6a48f7750da 100644 --- a/rust/kernel/platform.rs +++ b/rust/kernel/platform.rs @@ -63,12 +63,12 @@ unsafe fn register( module: &'static ThisModule, ) -> Result { let of_table = match T::OF_ID_TABLE { - Some(table) => table.as_ptr(), + Some(table) => table.as_raw_id_table(), None => core::ptr::null(), };

let acpi_table = match T::ACPI_ID_TABLE { - Some(table) => table.as_ptr(), + Some(table) => table.as_raw_id_table(), None => core::ptr::null(), };

diff --git a/rust/kernel/usb.rs b/rust/kernel/usb.rs index 7aff0c82d0af..14e0602c3f03 100644 --- a/rust/kernel/usb.rs +++ b/rust/kernel/usb.rs @@ -58,7 +58,7 @@ unsafe fn register( (*udrv.get()).name = name.as_char_ptr(); (*udrv.get()).probe = Some(Self::probe_callback); (*udrv.get()).disconnect = Some(Self::disconnect_callback); - (*udrv.get()).id_table = T::ID_TABLE.as_ptr(); + (*udrv.get()).id_table = T::ID_TABLE.as_raw_id_table(); }

// SAFETY: `udrv` is guaranteed to be a valid `DriverType`.

--- base-commit: dc59e4fea9d83f03bad6bddf3fa2e52491777482 change-id: 20260702-idtable-rename-asptr-3ea4d9e38287

Best regards,