Add a method to `Page` that allows construction of an instance from `struct page` pointer.
Signed-off-by: Andreas Hindborg <[email protected]> --- rust/kernel/page.rs | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/rust/kernel/page.rs b/rust/kernel/page.rs index e21f02ae47b72..96f1ec125f043 100644 --- a/rust/kernel/page.rs +++ b/rust/kernel/page.rs @@ -192,6 +192,17 @@ 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 convertible to a shared reference with a lifetime 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 convertible to a shared + // reference. + unsafe { &*ptr.cast() } + } + /// Runs a piece of code with this page mapped to an address. /// /// The page is unmapped when this call returns. -- 2.51.2
