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Wed, 2 Sep 2026 05:57:59 -0700 (PDT) Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 16.0 \(3826.700.81\)) Subject: Re: [PATCH 1/9] rust: sizes: add SZ_4G constant From: Daniel Almeida In-Reply-To: <20260902-tyr-ioctls-v1-1-e0fdbf8bd108@kylinos.cn> Date: Wed, 2 Sep 2026 09:57:40 -0300 Cc: rust-for-linux@vger.kernel.org, Miguel Ojeda , Boqun Feng , Gary Guo , =?utf-8?Q?Bj=C3=B6rn_Roy_Baron?= , Benno Lossin , Andreas Hindborg , Alice Ryhl , Trevor Gross , Danilo Krummrich , Tamir Duberstein , Alexandre Courbot , =?utf-8?Q?Onur_=C3=96zkan?= , Lorenzo Stoakes , "Liam R. Howlett" , Lyude Paul , David Airlie , Simona Vetter , linux-kernel@vger.kernel.org, linux-mm@kvack.org, dri-devel@lists.freedesktop.org, Alvin Sun Content-Transfer-Encoding: quoted-printable Message-Id: <39DEB659-59A2-43D6-9B62-805DB3715F49@collabora.com> References: <20260902-tyr-ioctls-v1-0-e0fdbf8bd108@kylinos.cn> <20260902-tyr-ioctls-v1-1-e0fdbf8bd108@kylinos.cn> To: sunke@kylinos.cn X-Mailer: Apple Mail (2.3826.700.81) X-ZohoMailClient: External X-Stat-Signature: xofqcfhpsdkeao1qu1snysoaps4h5ydi X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: 02B4F80004 X-Rspam-User: X-HE-Tag: 1788353890-939096 X-HE-Meta: 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 oyiul9dF qv7sU7ZuD4fk+Yze4AG7wc8eEqh7d1ER7oDyUhJoYEhUN0yXJ7GMwCAXq1p1Tj6H5OiMG55ti7hITeCmLHhpw8SSvgf+LU7lj3Aznb6GbhtQUS4IBZmwkse/me453HlsEU5lNFdXD3f4laCFPJRYa3Pfl1OAbxrLN7XhQkfKpbqfY8rDB+2osBpnaEyq0npi4RwXX8HgWPc00lfC1YMu/CUBW1CfQ5ZiMQyw9e1Gk998l2crPdOM38SASpTfL4kXMJ/fwyopVRd6Y82xoWIfZq/ilCh1daP1PooGk4SeKfKAlndw05E3/83yA37aaK226cGvisbMNrZekLfW0wYARvkieDy3u+eg4D7CUwuK0TkC8Lq/r+8cFSJgvQLfof02nDXgILsPZJXd7Kbm/7Vh43swGvvrWVUOw3irHfDaBwKyj3ZVdaGKiuZ4BjasS+sBPcIDDtcf3/ttFZdWDQY7RzIPZACdMCLMAJUtA Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: > On 1 Sep 2026, at 13:09, Ke Sun via B4 Relay = wrote: >=20 > From: Alvin Sun >=20 > SZ_4G is used by the Tyr driver when splitting the GPU VA range into > user and kernel regions. >=20 > Signed-off-by: Alvin Sun > --- > rust/bindings/bindings_helper.h | 1 + > rust/kernel/sizes.rs | 12 ++++++++++++ > 2 files changed, 13 insertions(+) >=20 > diff --git a/rust/bindings/bindings_helper.h = b/rust/bindings/bindings_helper.h > index 1124785e210b3..3c37993991b1e 100644 > --- a/rust/bindings/bindings_helper.h > +++ b/rust/bindings/bindings_helper.h > @@ -110,6 +110,7 @@ > const size_t RUST_CONST_HELPER_ARCH_SLAB_MINALIGN =3D = ARCH_SLAB_MINALIGN; > const size_t RUST_CONST_HELPER_ARCH_KMALLOC_MINALIGN =3D = ARCH_KMALLOC_MINALIGN; > const size_t RUST_CONST_HELPER_PAGE_SIZE =3D PAGE_SIZE; > +const unsigned long long RUST_CONST_HELPER_SZ_4G =3D SZ_4G; > const gfp_t RUST_CONST_HELPER_GFP_ATOMIC =3D GFP_ATOMIC; > const gfp_t RUST_CONST_HELPER_GFP_KERNEL =3D GFP_KERNEL; > const gfp_t RUST_CONST_HELPER_GFP_KERNEL_ACCOUNT =3D = GFP_KERNEL_ACCOUNT; > diff --git a/rust/kernel/sizes.rs b/rust/kernel/sizes.rs > index 521b2b38bfe77..b236573f0792e 100644 > --- a/rust/kernel/sizes.rs > +++ b/rust/kernel/sizes.rs > @@ -132,3 +132,15 @@ impl SizeConstants for $first { > } >=20 > define_sizes!(u32, u64, usize); > + > +/// Large size constants (=E2=89=A5 4 GiB). > +/// > +/// Only implemented for `u64`. > +pub trait LargeSizeConstants { > + /// `0x1_0000_0000`. > + const SZ_4G: Self; > +} > + > +impl LargeSizeConstants for u64 { > + const SZ_4G: Self =3D bindings::SZ_4G; > +} >=20 > --=20 > 2.43.0 >=20 >=20 Reviewed-by: Daniel Almeida