From: Eliot Courtney <ecourtney@nvidia.com>
To: "Alice Ryhl" <aliceryhl@google.com>,
"Burak Emir" <burak.emir@gmail.com>,
"Yury Norov" <yury.norov@gmail.com>,
"Miguel Ojeda" <ojeda@kernel.org>,
"Boqun Feng" <boqun@kernel.org>, "Gary Guo" <gary@garyguo.net>,
"Björn Roy Baron" <bjorn3_gh@protonmail.com>,
"Benno Lossin" <lossin@kernel.org>,
"Andreas Hindborg" <a.hindborg@kernel.org>,
"Trevor Gross" <tmgross@umich.edu>,
"Danilo Krummrich" <dakr@kernel.org>,
"Daniel Almeida" <daniel.almeida@collabora.com>,
"Tamir Duberstein" <tamird@kernel.org>,
"Alexandre Courbot" <acourbot@nvidia.com>,
"Onur Özkan" <work@onurozkan.dev>,
"David Airlie" <airlied@gmail.com>,
"Simona Vetter" <simona@ffwll.ch>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
John Hubbard <jhubbard@nvidia.com>,
Alistair Popple <apopple@nvidia.com>,
Timur Tabi <ttabi@nvidia.com>, Zhi Wang <zhiw@nvidia.com>,
rust-for-linux@vger.kernel.org, linux-kernel@vger.kernel.org,
nova-gpu@lists.linux.dev, dri-devel@lists.freedesktop.org,
Eliot Courtney <ecourtney@nvidia.com>
Subject: [PATCH v6 6/7] rust: id_pool: do not round capacity up to BitmapVec::MAX_INLINE_LEN
Date: Thu, 13 Aug 2026 16:34:30 +0900 [thread overview]
Message-ID: <20260813-chid-v6-6-160be5dfb5bd@nvidia.com> (raw)
In-Reply-To: <20260813-chid-v6-0-160be5dfb5bd@nvidia.com>
Current code in IdPool::with_capacity rounds the capacity up to
BitmapVec::MAX_INLINE_LEN, but BitmapVec::new works fine with values
smaller than this and still uses an inline representation. Remove this
behaviour.
Signed-off-by: Eliot Courtney <ecourtney@nvidia.com>
---
rust/kernel/id_pool.rs | 7 +------
1 file changed, 1 insertion(+), 6 deletions(-)
diff --git a/rust/kernel/id_pool.rs b/rust/kernel/id_pool.rs
index 1423a5fbca69..9baafc1732be 100644
--- a/rust/kernel/id_pool.rs
+++ b/rust/kernel/id_pool.rs
@@ -113,14 +113,9 @@ pub fn new() -> Self {
}
/// Constructs a new [`IdPool`] with space for a specific number of bits.
- ///
- /// A capacity below [`MAX_INLINE_LEN`] is adjusted to [`MAX_INLINE_LEN`].
- ///
- /// [`MAX_INLINE_LEN`]: BitmapVec::MAX_INLINE_LEN
#[inline]
pub fn with_capacity(num_ids: NonZero<usize>, flags: Flags) -> Result<Self, AllocError> {
- let num_ids = usize::max(num_ids.get(), BitmapVec::MAX_INLINE_LEN);
- let map = BitmapVec::new(num_ids, flags)?;
+ let map = BitmapVec::new(num_ids.get(), flags)?;
Ok(Self { map })
}
--
2.55.0
next prev parent reply other threads:[~2026-08-13 7:35 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-13 7:34 [PATCH v6 0/7] rust: Add support for reserving of ranges of IDs Eliot Courtney
2026-08-13 7:34 ` [PATCH v6 1/7] rust: bitmap: use function-level cfg on kunit test Eliot Courtney
2026-08-13 7:34 ` [PATCH v6 2/7] rust: bitmap: restrict bitmap length to at most i32::MAX Eliot Courtney
2026-08-13 7:34 ` [PATCH v6 3/7] rust: bitmap: add contiguous area operations Eliot Courtney
2026-08-13 7:34 ` [PATCH v6 4/7] rust: id_pool: add contiguous area allocation Eliot Courtney
2026-08-13 7:34 ` [PATCH v6 5/7] rust: id_pool: take a NonZero capacity in with_capacity Eliot Courtney
2026-08-13 7:34 ` Eliot Courtney [this message]
2026-08-13 7:34 ` [PATCH v6 7/7] gpu: nova-core: add ChannelIdPool Eliot Courtney
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