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a=openpgp; fpr=49F6C1FAA74960F43A5B86A1EE7A392FDE96209F X-Developer-Signature: v=1; a=openpgp-sha256; l=1712; i=aliceryhl@google.com; h=from:subject:message-id; bh=zjU+xITGYBikz3POlNtXOEPXelplJfBbb1n+/juZ6VA=; b=owEBbQKS/ZANAwAKAQRYvu5YxjlGAcsmYgBpJbZYqTKcsz22atZEfxzG4xjJGo0eUshxVev6E aMGl5K4C4SJAjMEAAEKAB0WIQSDkqKUTWQHCvFIvbIEWL7uWMY5RgUCaSW2WAAKCRAEWL7uWMY5 Rr+eEACWgQcRUdJQA14WuJL7sAPA3w1SOZ3sa2T6ZvPAjW8cf27sI3x7mRvrSTsi7tVQBGIAeVR MTidhCHXjDUGac4d3Z6PZz/N4fxCE0dLTCQrACefD9EyHxW2J0XKz0FFsWzlwO3oMAphGYYnZn6 MCvk0mu/hCmARm41ZavvnnCOmKTawgNdRzJS78x1HaP0Kob5RW368RUwxjry6oUGvXKpCgSqwYj GmtPrpWSBZTjK0ofvq1h7crr2CE269QWurJ/p53beEo19olT4DFVlphwqlU2ASUV3C3Cn6SHRfy Y/qiV9XIF/9CPNLy2LK6cYi/WO8S4vnJxrOtKnWmSNr2YfW0bDhKuj8+R2biXCVvtsK5apVS1GC X8RvbfCP3EXZmeX/0WXjs3hHAcBzObYLFYGQZ1zNuNkhZaKn/YoXHBl7y2eo7gKdwSBfdmHPQSX t9Ru1eWn0MeafRuyhRLtlfP2TRV4B0yGfjo6B5onM5422ubUEejah8iy3UYyxyV7RIwtpNdYpOk +LjQUoKhHsTg/XFPQ5OMB3nsZzwexaA44AQJzt9VZC1aC2w4WYOdoHsB3bWd3FIaDc1mOCpQa97 u78LbwS0nAzsHsX2cmc2ZDt+zP779nFS5iBJiLTw4GGNarO/SxvxYpazwSM/hNmifdoBzmH1Znl Kiwce3DT9U0RXng== X-Mailer: b4 0.14.2 Message-ID: <20251125-binder-bitmap-v6-4-dedaf1d05a98@google.com> Subject: [PATCH v6 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 7968b6c5566bf7022b865b5f59deaf46c96f747d..1adec2c6fdb0b80515f9b64c672= 18efa864ce580 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`]. @@ -229,3 +241,10 @@ pub fn release_id(&mut self, id: usize) { self.map.clear_bit(id); } } + +impl Default for IdPool { + #[inline] + fn default() -> Self { + Self::new() + } +} --=20 2.52.0.460.gd25c4c69ec-goog