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a=openpgp; fpr=49F6C1FAA74960F43A5B86A1EE7A392FDE96209F X-Developer-Signature: v=1; a=openpgp-sha256; l=1290; i=aliceryhl@google.com; h=from:subject:message-id; bh=5yWWXBJ/seWzcBWVusBVihezy0B+tB+i4oi0yNZtcHI=; b=owEBbQKS/ZANAwAKAQRYvu5YxjlGAcsmYgBpEeNDKRkmT+eOFgF8qJNPqMuq73VthlH6qF02U gm/b3pc2m2JAjMEAAEKAB0WIQSDkqKUTWQHCvFIvbIEWL7uWMY5RgUCaRHjQwAKCRAEWL7uWMY5 RgovD/9UPkoV9/Kw5N2FJvKeN4yQg2mNamCxIoxCg410jOoQTCh67qNkiYf86ZwyW8r8GG3MWqY qH8f4IONzFImNn7/0e628fJWiKwDyMWkQ/ne/UMTmbENtdNE86kce3vUnV8JoxwP14mu4UwBg3T ZnL8zCmdXaUWCqarCQXv22vYx+cwSQhk4SnAFcrCNwmVZwWzd7ieh1CLNULkL+4q/IdN3TuZP+4 JWEm2ff3E9XX/FjdMKLTRJN6iWfj5Yntx2kjpS2fNLNUpK9rOkjO6xc7FZj6UiPH9Fba1GssHsI wDfcPe3Wj1arPK7027CA7WAQcthCNJRhDzkgRQMGg07pVXzgmLVAkNsuQ4DNcozA816NuogzeQv Y8V/x0Guce+xnkXHeNXpeQ/2XpmGu33+o0J8bVMDGcOWh7suzreLkADlMzrK7My4auA94o8zPPG W2KuCFc6XnQhunaHw6c7PbwAdzgBErEnSFUyo3rOPLivmudr3S/fwX3bN+C3fNEwoCuKSWEnZUm MaRlwvcZDl7grb3g3xW4qeDEBRJNZuJeZ6aAWucXPikb1i0kjTZLiOsjfTqK8Az8AezfOWaBH4/ v8AfosvP2PI3ebNlvZZpVGirKDdh/CB5AkB5l+8VMCxZcA3LA/IZrVPudctSuBcqrS3GYjXaExA voaqrbMLunNLsgw== X-Mailer: b4 0.14.2 Message-ID: <20251110-binder-bitmap-v4-2-5ed8a7fab1b9@google.com> Subject: [PATCH v4 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 15fa23b45054b9272415fcc000e3e3b52c74d7c1..f385a539a90ba87a7b9f6d686e150e95e358bbef 100644 --- a/rust/kernel/bitmap.rs +++ b/rust/kernel/bitmap.rs @@ -232,6 +232,16 @@ impl BitmapVec { /// The maximum length that avoids allocating. pub const NO_ALLOC_MAX_LEN: usize = BITS_PER_LONG; + /// 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