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a=openpgp; fpr=49F6C1FAA74960F43A5B86A1EE7A392FDE96209F X-Developer-Signature: v=1; a=openpgp-sha256; l=1713; i=aliceryhl@google.com; h=from:subject:message-id; bh=Us/zLvFyE9k9qHI3mL8Iz47DL6Q8odLnYIznsT0OSFA=; b=owEBbQKS/ZANAwAKAQRYvu5YxjlGAcsmYgBpFIHfc7CzR4SxgRNX8ioWyORnLUfzvrYfKI4v+ cRiUWGPoQOJAjMEAAEKAB0WIQSDkqKUTWQHCvFIvbIEWL7uWMY5RgUCaRSB3wAKCRAEWL7uWMY5 RowRD/0aRa47W4TvjdH1/jgUrSCq7q2C0cUfnbeyWGUCsg82SeCDLmnnpAzTKBivWMOVYS4qii3 8FO9TGsBIh1Rzq6YK7SVZHez3NC/lVGY9rTn4WB/VKe8CUjhBSWIEzOvBoerWvneoEH3E/gPUFZ cLrAFl/lL/Dq8MwgwRFuKHPI64cwzkKuE3DgsG6k/4lDDECobNO+kcAQ0x8O6XrZXURd2yDvRIZ IOdfikmSE57eQYZsmqrC5yeP3vYPTIYlMSiB2N68Rd69W/J7BvgDmxP7q9bfxy6qv75ZvqthlMH 9LnVxNgyhj/X0kxbweAnLUg9tU0glvYRFv/cl6xJia7GlJ5S2Efk/ThQQ9L04HHzxeM/XBE4wl1 tdnIZ+Yb84KP8+/IqSWSV4kLC7+Q7i6roEjQlRkSxdWjCj+tgIqKKm2XsHgEyhXbii/txvV2AdI AFUVr4u3o5WnyYBBfTfCQq4cwQ+onY0UKjiHHu8uGoK2k46o+IaW1GjgIwCYV8dyJ2hfML9nEyw VVwgp5GMeSShzwusxIIcprO6NuJ9u+DJfKVTAf6G3rnlDxHDKRL7yQAeOBwfw/F7biQmDy4Tg/R HajzGoMwM+HDFl4l9Xj9bc/eYVcusshKUBwZb1p4G7doYj1uOhhytizCwYKANhD2CgRYAI+hLyx GPjWvySP41qQiiA== X-Mailer: b4 0.14.2 Message-ID: <20251112-binder-bitmap-v5-4-8b9d7c7eca82@google.com> Subject: [PATCH v5 4/6] rust: id_pool: do not supply starting capacity 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" Content-Transfer-Encoding: quoted-printable Rust Binder wants to use inline bitmaps whenever possible to avoid allocations, so introduce a constructor for an IdPool with arbitrary capacity that stores the bitmap inline. The existing constructor could be renamed to with_capacity() to match constructors for other similar types, but it is removed as there is currently no user for it. Acked-by: Yury Norov (NVIDIA) Reviewed-by: Burak Emir Reviewed-by: Danilo Krummrich Signed-off-by: Alice Ryhl --- rust/kernel/id_pool.rs | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/rust/kernel/id_pool.rs b/rust/kernel/id_pool.rs index 90836b05c6155f98ab8393c8291749f408dbd4da..dc856fc68f4cf38971332f15e63= 440f27868a3b6 100644 --- a/rust/kernel/id_pool.rs +++ b/rust/kernel/id_pool.rs @@ -93,6 +93,18 @@ pub fn realloc(&self, flags: Flags) -> Result { } =20 impl IdPool { + /// Constructs a new [`IdPool`]. + /// + /// The pool will have a capacity of [`NO_ALLOC_MAX_LEN`]. + /// + /// [`NO_ALLOC_MAX_LEN`]: BitmapVec::NO_ALLOC_MAX_LEN + #[inline] + pub fn new() -> Self { + Self { + map: BitmapVec::new_inline(), + } + } + /// Constructs a new [`IdPool`] with space for a specific number of bi= ts. /// /// A capacity below [`MAX_INLINE_LEN`] is adjusted to [`MAX_INLINE_LE= N`]. @@ -223,3 +235,10 @@ pub fn release_id(&mut self, id: usize) { self.map.clear_bit(id); } } + +impl Default for IdPool { + #[inline] + fn default() -> Self { + Self::new() + } +} --=20 2.51.2.1041.gc1ab5b90ca-goog