[PATCH v20 1/8] rust: alloc: add `KBox::into_non_null`
COLD28d
REVIEWED: 16 (16M)
From: Andreas Hindborg <a.hindborg@kernel.org>
Date: 2026-08-24 11:19:29
Also in:
dri-devel, linux-block, linux-fsdevel, linux-mm, linux-pci, linux-pm, linux-pwm, linux-security-module, linux-usb, lkml, rust-for-linux
Subsystem:
rust, rust [alloc], the rest · Maintainers:
Miguel Ojeda, Danilo Krummrich, Linus Torvalds
Revision v20 of 8 in this series; 2 review trailers (2 from subsystem maintainers).
Revisions (8)
Add a method to consume a `Box<T, A>` and return a `NonNull<T>`. This is a convenience wrapper around `Self::into_raw` for callers that need a `NonNull` pointer rather than a raw pointer. Signed-off-by: Andreas Hindborg <a.hindborg@kernel.org> Reviewed-by: Alice Ryhl <aliceryhl@google.com> Reviewed-by: Gary Guo <gary@garyguo.net> --- rust/kernel/alloc/kbox.rs | 9 +++++++++ 1 file changed, 9 insertions(+)
diff --git a/rust/kernel/alloc/kbox.rs b/rust/kernel/alloc/kbox.rs
index 35d1e015848dd..e6c637bbe2009 100644
--- a/rust/kernel/alloc/kbox.rs
+++ b/rust/kernel/alloc/kbox.rs@@ -211,6 +211,15 @@ pub fn leak<'a>(b: Self) -> &'a mut T { // which points to an initialized instance of `T`. unsafe { &mut *Box::into_raw(b) } } + + /// Consumes the `Box<T, A>` and returns a `NonNull<T>`. + /// + /// Like [`Self::into_raw`], but returns a `NonNull`. + #[inline] + pub fn into_non_null(b: Self) -> NonNull<T> { + // SAFETY: `Box::into_raw` returns a valid pointer. + unsafe { NonNull::new_unchecked(Self::into_raw(b)) } + } } impl<T, A> Box<MaybeUninit<T>, A>
--
2.51.2