diff options
| -rw-r--r-- | rust/kernel/device.rs | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/rust/kernel/device.rs b/rust/kernel/device.rs index 7b96c99879a6..53a13dd4d2d4 100644 --- a/rust/kernel/device.rs +++ b/rust/kernel/device.rs @@ -9,7 +9,7 @@ use crate::{ str::CStr, types::{ARef, Opaque}, }; -use core::{fmt, ptr}; +use core::{fmt, marker::PhantomData, ptr}; #[cfg(CONFIG_PRINTK)] use crate::c_str; @@ -42,7 +42,7 @@ use crate::c_str; /// `bindings::device::release` is valid to be called from any thread, hence `ARef<Device>` can be /// dropped from any thread. #[repr(transparent)] -pub struct Device(Opaque<bindings::device>); +pub struct Device<Ctx: DeviceContext = Normal>(Opaque<bindings::device>, PhantomData<Ctx>); impl Device { /// Creates a new reference-counted abstraction instance of an existing `struct device` pointer. @@ -59,7 +59,9 @@ impl Device { // SAFETY: By the safety requirements ptr is valid unsafe { Self::as_ref(ptr) }.into() } +} +impl<Ctx: DeviceContext> Device<Ctx> { /// Obtain the raw `struct device *`. pub(crate) fn as_raw(&self) -> *mut bindings::device { self.0.get() @@ -189,6 +191,11 @@ impl Device { } } +// SAFETY: `Device` is a transparent wrapper of a type that doesn't depend on `Device`'s generic +// argument. +kernel::impl_device_context_deref!(unsafe { Device }); +kernel::impl_device_context_into_aref!(Device); + // SAFETY: Instances of `Device` are always reference-counted. unsafe impl crate::types::AlwaysRefCounted for Device { fn inc_ref(&self) { |