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a=openpgp; fpr=49F6C1FAA74960F43A5B86A1EE7A392FDE96209F X-Developer-Signature: v=1; a=openpgp-sha256; l=1308; i=aliceryhl@google.com; h=from:subject:message-id; bh=jU12ZpgtH991h5e7ZBwBatZK4g5q1U/xD8yC7I7uHME=; b=kA0DAAoBBFi+7ljGOUYByyZiAGkUgd7IN5ZSHLCDpzD9Me3XDUof+vZJ+MpQbPfrpbDnUcnSn IkCMwQAAQoAHRYhBIOSopRNZAcK8Ui9sgRYvu5YxjlGBQJpFIHeAAoJEARYvu5YxjlG66kQALG6 l36BdIAxhSaLv06Oh8rVycDqelTzLAe/S4UyL1ibV4SbA2OwlkMe1W/qXjTWofTFjUE+G0d0We+ mBmiFe5ANObGJoqifL+V/FCeZeyOeGzrL0toiPTwkJ4ORfsfxDy55Ej4QdjqHCb3qrjpHuBgXO7 pRPNtoy+DH7Lk0ATI4MBx8tYnWPt+WtljVLTPTWkJw0KSn1Q34JSD6klKWRNWseBj5IIvR0Rnxz Dmv7Ij6knxHf81G0HLeK1CdLar8KUiDVSateJ4BlG7DG86XU6+lgx3yVqlck1XUqg7wtr2O9XV1 Ysi1YB/Y6wwe1nHzlhM4afN26AumEWw1iiT3njn5ZSme+lP3pi+48cl3vixgPwv0+aofx0yk1ON 4WbDuhL7bxF8pDc6/5Ckb+/T5smMsG/YQmaci46CjIruPXLU5ko+RheAsb1WaKBqhExIZF5+ZYb ODExzuaiMAqeT7nNrnFGhvWiVLolpxyb4SLJjeJED0AWsWJAJDpmFlXFw1+a8liVZ0fiDCihCqo lbdpxmbpSTy5OBenoTAD8Pl7jLe4rs7cNMFkCwBbwg4wguJv+3hDSFNkhH7wvRpEzvxu3kmhEBL LiIrQVH8CxKOFQ2l8dEPV0zTWWNUxvw46PsnL37KhDG5px+2+lhodpg5CbF9s1oURhYI+Y3W854 hp7x9 X-Mailer: b4 0.14.2 Message-ID: <20251112-binder-bitmap-v5-2-8b9d7c7eca82@google.com> Subject: [PATCH v5 2/6] rust: bitmap: add BitmapVec::new_inline() From: Alice Ryhl To: Greg Kroah-Hartman , Yury Norov Cc: "=?utf-8?q?Arve_Hj=C3=B8nnev=C3=A5g?=" , Todd Kjos , Martijn Coenen , Joel Fernandes , Christian Brauner , Carlos Llamas , Suren Baghdasaryan , Burak Emir , Miguel Ojeda , Boqun Feng , Gary Guo , "=?utf-8?q?Bj=C3=B6rn_Roy_Baron?=" , Benno Lossin , Andreas Hindborg , Trevor Gross , Danilo Krummrich , rust-for-linux@vger.kernel.org, linux-kernel@vger.kernel.org, Alice Ryhl Content-Type: text/plain; charset="utf-8" This constructor is useful when you just want to create a BitmapVec without allocating but don't care how large it is. Acked-by: Yury Norov (NVIDIA) Reviewed-by: Burak Emir Reviewed-by: Danilo Krummrich Signed-off-by: Alice Ryhl --- rust/kernel/bitmap.rs | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/rust/kernel/bitmap.rs b/rust/kernel/bitmap.rs index 0705646c6251a49f213a45f1f013cb9eb2ed81de..bbbf0f9e5d9251953584581af57042143447b996 100644 --- a/rust/kernel/bitmap.rs +++ b/rust/kernel/bitmap.rs @@ -230,6 +230,16 @@ impl BitmapVec { /// The maximum length that uses the inline representation. pub const MAX_INLINE_LEN: usize = usize::BITS as usize; + /// Construct a longest possible inline [`BitmapVec`]. + #[inline] + pub fn new_inline() -> Self { + // INVARIANT: `nbits <= NO_ALLOC_MAX_LEN`, so an inline bitmap is the right repr. + BitmapVec { + repr: BitmapRepr { bitmap: 0 }, + nbits: BitmapVec::NO_ALLOC_MAX_LEN, + } + } + /// Constructs a new [`BitmapVec`]. /// /// Fails with [`AllocError`] when the [`BitmapVec`] could not be allocated. This -- 2.51.2.1041.gc1ab5b90ca-goog