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authorBenno Lossin <benno.lossin@proton.me>2023-04-08 15:25:39 +0300
committerMiguel Ojeda <ojeda@kernel.org>2023-04-12 19:41:05 +0300
commit3ff6e785ad99893f1d502156d23560efd30fec4d (patch)
tree43f1469f5ea3e1cc17096d757b272cd5313b72b1 /rust
parentd6dbca3592209d29c10e171224c34803805e88ca (diff)
downloadlinux-3ff6e785ad99893f1d502156d23560efd30fec4d.tar.xz
rust: types: add `Opaque::raw_get`
This function mirrors `UnsafeCell::raw_get`. It avoids creating a reference and allows solely using raw pointers. The `pin-init` API will be using this, since uninitialized memory requires raw pointers. Signed-off-by: Benno Lossin <benno.lossin@proton.me> Reviewed-by: Gary Guo <gary@garyguo.net> Reviewed-by: Andreas Hindborg <a.hindborg@samsung.com> Reviewed-by: Alice Ryhl <aliceryhl@google.com> Link: https://lore.kernel.org/r/20230408122429.1103522-6-y86-dev@protonmail.com Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
Diffstat (limited to 'rust')
-rw-r--r--rust/kernel/types.rs8
1 files changed, 8 insertions, 0 deletions
diff --git a/rust/kernel/types.rs b/rust/kernel/types.rs
index 9d0fdbc55843..ff2b2fac951d 100644
--- a/rust/kernel/types.rs
+++ b/rust/kernel/types.rs
@@ -238,6 +238,14 @@ impl<T> Opaque<T> {
pub fn get(&self) -> *mut T {
UnsafeCell::raw_get(self.0.as_ptr())
}
+
+ /// Gets the value behind `this`.
+ ///
+ /// This function is useful to get access to the value without creating intermediate
+ /// references.
+ pub const fn raw_get(this: *const Self) -> *mut T {
+ UnsafeCell::raw_get(this.cast::<UnsafeCell<T>>())
+ }
}
/// A sum type that always holds either a value of type `L` or `R`.