From: Gary Guo <gary@garyguo.net>
To: Alice Ryhl <aliceryhl@google.com>
Cc: "Steven Rostedt" <rostedt@goodmis.org>,
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loongarch@lists.linux.dev
Subject: Re: [PATCH v4 1/2] rust: add static_key_false
Date: Tue, 30 Jul 2024 11:20:13 +0100 [thread overview]
Message-ID: <20240730112013.4d0cd624@eugeo> (raw)
In-Reply-To: <20240628-tracepoint-v4-1-353d523a9c15@google.com>
On Fri, 28 Jun 2024 13:23:31 +0000
Alice Ryhl <aliceryhl@google.com> wrote:
> Add just enough support for static key so that we can use it from
> tracepoints. Tracepoints rely on `static_key_false` even though it is
> deprecated, so we add the same functionality to Rust.
>
> It is not possible to use the existing C implementation of
> arch_static_branch because it passes the argument `key` to inline
> assembly as an 'i' parameter, so any attempt to add a C helper for this
> function will fail to compile because the value of `key` must be known
> at compile-time.
>
> Signed-off-by: Alice Ryhl <aliceryhl@google.com>
Reviewed-by: Gary Guo <gary@garyguo.net>
> ---
> rust/kernel/arch/arm64/jump_label.rs | 34 ++++++++++++++++++++++++++++
> rust/kernel/arch/loongarch/jump_label.rs | 35 +++++++++++++++++++++++++++++
> rust/kernel/arch/mod.rs | 24 ++++++++++++++++++++
> rust/kernel/arch/riscv/jump_label.rs | 38 ++++++++++++++++++++++++++++++++
> rust/kernel/arch/x86/jump_label.rs | 35 +++++++++++++++++++++++++++++
> rust/kernel/lib.rs | 2 ++
> rust/kernel/static_key.rs | 32 +++++++++++++++++++++++++++
> scripts/Makefile.build | 2 +-
> 8 files changed, 201 insertions(+), 1 deletion(-)
next prev parent reply other threads:[~2024-07-30 10:20 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-06-28 13:23 [PATCH v4 0/2] Tracepoints and static branch in Rust Alice Ryhl
2024-06-28 13:23 ` [PATCH v4 1/2] rust: add static_key_false Alice Ryhl
2024-06-30 6:00 ` hev
2024-07-30 10:20 ` Gary Guo [this message]
2024-07-31 17:05 ` Peter Zijlstra
2024-07-31 21:34 ` Alice Ryhl
2024-08-01 10:28 ` Peter Zijlstra
2024-08-01 18:26 ` Alice Ryhl
2024-06-28 13:23 ` [PATCH v4 2/2] rust: add tracepoint support Alice Ryhl
2024-07-04 15:20 ` Carlos Llamas
2024-07-30 10:35 ` Gary Guo
2024-07-31 16:15 ` Steven Rostedt
2024-07-31 18:58 ` Benno Lossin
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