From: Alice Ryhl <aliceryhl@google.com>
To: Kunwu Chan <kunwu.chan@linux.dev>,
Christian Brauner <brauner@kernel.org>
Cc: ojeda@kernel.org, alex.gaynor@gmail.com, boqun.feng@gmail.com,
gary@garyguo.net, bjorn3_gh@protonmail.com,
benno.lossin@proton.me, a.hindborg@kernel.org,
tmgross@umich.edu, dakr@kernel.org, nathan@kernel.org,
nick.desaulniers+lkml@gmail.com, morbo@google.com,
justinstitt@google.com, rust-for-linux@vger.kernel.org,
linux-kernel@vger.kernel.org, llvm@lists.linux.dev,
Kunwu Chan <kunwu.chan@hotmail.com>,
Grace Deng <Grace.Deng006@gmail.com>
Subject: Re: [PATCH v2] rust: file: optimize rust symbol generation for FileDescriptorReservation
Date: Mon, 17 Mar 2025 10:24:15 +0000 [thread overview]
Message-ID: <Z9f4Twvl-UaX1NQp@google.com> (raw)
In-Reply-To: <20250317023702.2360726-1-kunwu.chan@linux.dev>
Adding Christian Brauner who originally merged the
rust/kernel/fs/file.rs file.
On Mon, Mar 17, 2025 at 10:37:02AM +0800, Kunwu Chan wrote:
> From: Kunwu Chan <kunwu.chan@hotmail.com>
>
> When build the kernel using the llvm-18.1.3-rust-1.85.0-x86_64
> with ARCH=arm64, the following symbols are generated:
>
> $ nm vmlinux | grep ' _R'.*FileDescriptorReservation | rustfilt
> ... T <kernel::fs::file::FileDescriptorReservation>::fd_install
> ... T <kernel::fs::file::FileDescriptorReservation>::get_unused_fd_flags
> ... T <kernel::fs::file::FileDescriptorReservation as core::ops::drop::Drop>::drop
>
> These Rust symbols are trivial wrappers around the C functions
> fd_install, put_unused_fd and put_task_struct. It
> doesn't make sense to go through a trivial wrapper for these
> functions, so mark them inline.
>
> Link: https://github.com/Rust-for-Linux/linux/issues/1145
> Suggested-by: Alice Ryhl <aliceryhl@google.com>
> Co-developed-by: Grace Deng <Grace.Deng006@Gmail.com>
> Signed-off-by: Grace Deng <Grace.Deng006@Gmail.com>
> Signed-off-by: Kunwu Chan <kunwu.chan@hotmail.com>
Reviewed-by: Alice Ryhl <aliceryhl@google.com>
next prev parent reply other threads:[~2025-03-17 10:24 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-03-17 2:37 [PATCH v2] rust: file: optimize rust symbol generation for FileDescriptorReservation Kunwu Chan
2025-03-17 10:24 ` Alice Ryhl [this message]
2025-03-18 8:24 ` Christian Brauner
2025-03-18 8:26 ` Christian Brauner
-- strict thread matches above, loose matches on Subject: below --
2025-03-17 10:29 Benno Lossin
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