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Sun, 10 Aug 2025 18:19:50 -0700 (PDT) Received: from fedora ([2405:201:5501:4085:eece:e0ff:6b68:de2e]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-615a8f17829sm17381133a12.19.2025.08.10.18.19.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 10 Aug 2025 18:19:49 -0700 (PDT) From: Ritvik Gupta To: Thomas Gleixner , Peter Zijlstra , Miguel Ojeda , Alex Gaynor , Boqun Feng , Gary Guo , =?UTF-8?q?Bj=C3=B6rn=20Roy=20Baron?= , Benno Lossin , Andreas Hindborg , Alice Ryhl , Trevor Gross , Danilo Krummrich , Nathan Chancellor , Nick Desaulniers , Bill Wendling , Justin Stitt Cc: skhan@linuxfoundation.org, linux-kernel@vger.kernel.org, rust-for-linux@vger.kernel.org, llvm@lists.linux.dev Subject: [PATCH] rust: kernel: cpu: mark `CpuId::current()` inline Date: Mon, 11 Aug 2025 06:49:58 +0530 Message-ID: <20250811012000.444173-1-ritvikfoss@gmail.com> X-Mailer: git-send-email 2.50.1 Precedence: bulk X-Mailing-List: llvm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit When building the kernel using llvm-20.1.7-rust-1.89.0-x86_64, this symbol is generated: $ llvm-nm --demangle vmlinux | grep CpuId ffffffff84c77450 T ::current However, this Rust symbol is a trivial wrapper around `raw_smp_processor_id` function. It doesn't make sense to go through a trivial wrapper for such functions, so mark it inline. After applying this patch, the above command will produce no output. Suggested-by: Alice Ryhl Link: https://github.com/Rust-for-Linux/linux/issues/1145 Signed-off-by: Ritvik Gupta --- rust/kernel/cpu.rs | 1 + 1 file changed, 1 insertion(+) diff --git a/rust/kernel/cpu.rs b/rust/kernel/cpu.rs index 5de730c8d817..cb6c0338ef5a 100644 --- a/rust/kernel/cpu.rs +++ b/rust/kernel/cpu.rs @@ -109,6 +109,7 @@ pub fn as_u32(&self) -> u32 { /// unexpectedly due to preemption or CPU migration. It should only be /// used when the context ensures that the task remains on the same CPU /// or the users could use a stale (yet valid) CPU ID. + #[inline] pub fn current() -> Self { // SAFETY: raw_smp_processor_id() always returns a valid CPU ID. unsafe { Self::from_u32_unchecked(bindings::raw_smp_processor_id()) } base-commit: 8f5ae30d69d7543eee0d70083daf4de8fe15d585 -- 2.50.1