[PATCH v14 9/9] rust: page: add `from_raw()`
From: Andreas Hindborg <a.hindborg@kernel.org>
Date: 2026-02-04 11:58:41
Also in:
dri-devel, linux-block, linux-fsdevel, linux-mm, linux-pci, linux-pm, lkml, rust-for-linux
Subsystem:
memory management - rust, rust, the rest · Maintainers:
Alice Ryhl, Miguel Ojeda, Linus Torvalds
Add a method to `Page` that allows construction of an instance from `struct page` pointer. Signed-off-by: Andreas Hindborg <redacted> --- rust/kernel/page.rs | 11 +++++++++++ 1 file changed, 11 insertions(+)
diff --git a/rust/kernel/page.rs b/rust/kernel/page.rs
index 4591b7b01c3d2..803f3e3d76b22 100644
--- a/rust/kernel/page.rs
+++ b/rust/kernel/page.rs@@ -191,6 +191,17 @@ pub fn nid(&self) -> i32 { unsafe { bindings::page_to_nid(self.as_ptr()) } } + /// Create a `&Page` from a raw `struct page` pointer + /// + /// # Safety + /// + /// `ptr` must be valid for use as a reference for the duration of `'a`. + pub unsafe fn from_raw<'a>(ptr: *const bindings::page) -> &'a Self { + // SAFETY: By function safety requirements, ptr is not null and is + // valid for use as a reference. + unsafe { &*Opaque::cast_from(ptr).cast::<Self>() } + } + /// Runs a piece of code with this page mapped to an address. /// /// The page is unmapped when this call returns.
--
2.51.2