From: Alice Ryhl <aliceryhl@google.com>
To: Kunwu Chan <kunwu.chan@linux.dev>
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: sync: optimize Rust symbol generation for PollCondVar
Date: Thu, 20 Mar 2025 08:42:28 +0000 [thread overview]
Message-ID: <Z9vU9G9A0mneuqT0@google.com> (raw)
In-Reply-To: <20250317025205.2366518-1-kunwu.chan@linux.dev>
On Mon, Mar 17, 2025 at 10:52:05AM +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'.*PollCondVar | rustfilt
> ... T <kernel::sync::poll::PollCondVar>::new::{closure#0}::{closure#0}::panic_cold_explicit
> ... T <kernel::sync::poll::PollCondVar as kernel::init::PinnedDrop>::drop
> ... T <kernel::sync::poll::PollCondVar as core::ops::drop::Drop>::drop
>
> This Rust symbol
> (<kernel::sync::poll::PollCondVar as kernel::init::PinnedDrop>::drop)
> is trivial wrappers around the C functions __wake_up_pollfree
> and synchronize_rcu. It doesn't make sense to go through a trivial
> wrapper for its functions,so mark it 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:[~2025-03-20 8:42 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-03-17 2:52 [PATCH v2] rust: sync: optimize Rust symbol generation for PollCondVar Kunwu Chan
2025-03-17 10:23 ` Benno Lossin
2025-03-20 8:42 ` Alice Ryhl [this message]
2025-03-23 17:49 ` Boqun Feng
2025-03-24 2:13 ` Kunwu Chan
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