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[103.168.172.201]) by smtp.gmail.com with ESMTPSA id d75a77b69052e-4771d179f42sm36056481cf.25.2025.03.23.10.49.04 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 23 Mar 2025 10:49:04 -0700 (PDT) Received: from phl-compute-10.internal (phl-compute-10.phl.internal [10.202.2.50]) by mailfauth.phl.internal (Postfix) with ESMTP id E888E1200043; Sun, 23 Mar 2025 13:49:03 -0400 (EDT) Received: from phl-mailfrontend-01 ([10.202.2.162]) by phl-compute-10.internal (MEProxy); Sun, 23 Mar 2025 13:49:03 -0400 X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgeefvddrtddtgdduheejheduucetufdoteggodetrf dotffvucfrrhhofhhilhgvmecuhfgrshhtofgrihhlpdggtfgfnhhsuhgsshgtrhhisggv pdfurfetoffkrfgpnffqhgenuceurghilhhouhhtmecufedttdenucesvcftvggtihhpih gvnhhtshculddquddttddmnecujfgurhepfffhvfevuffkfhggtggujgesthdtredttddt vdenucfhrhhomhepuehoqhhunhcuhfgvnhhguceosghoqhhunhdrfhgvnhhgsehgmhgrih hlrdgtohhmqeenucggtffrrghtthgvrhhnpefftdeihfeigedtvdeuueffieetvedtgeej uefhhffgudfgfeeggfeftdeigeehvdenucffohhmrghinhepghhithhhuhgsrdgtohhmne cuvehluhhsthgvrhfuihiivgeptdenucfrrghrrghmpehmrghilhhfrhhomhepsghoqhhu nhdomhgvshhmthhprghuthhhphgvrhhsohhnrghlihhthidqieelvdeghedtieegqdduje ejkeehheehvddqsghoqhhunhdrfhgvnhhgpeepghhmrghilhdrtghomhesfhhigihmvgdr nhgrmhgvpdhnsggprhgtphhtthhopedvtddpmhhouggvpehsmhhtphhouhhtpdhrtghpth htohepkhhunhifuhdrtghhrghnsehlihhnuhigrdguvghvpdhrtghpthhtohepohhjvggu rgeskhgvrhhnvghlrdhorhhgpdhrtghpthhtoheprghlvgigrdhgrgihnhhorhesghhmrg hilhdrtghomhdprhgtphhtthhopehgrghrhiesghgrrhihghhuohdrnhgvthdprhgtphht thhopegsjhhorhhnfegpghhhsehprhhothhonhhmrghilhdrtghomhdprhgtphhtthhope gsvghnnhhordhlohhsshhinhesphhrohhtohhnrdhmvgdprhgtphhtthhopegrrdhhihhn uggsohhrgheskhgvrhhnvghlrdhorhhgpdhrtghpthhtoheprghlihgtvghrhihhlhesgh hoohhglhgvrdgtohhmpdhrtghpthhtohepthhmghhrohhsshesuhhmihgthhdrvgguuh X-ME-Proxy: Feedback-ID: iad51458e:Fastmail Received: by mail.messagingengine.com (Postfix) with ESMTPA; Sun, 23 Mar 2025 13:49:03 -0400 (EDT) Date: Sun, 23 Mar 2025 10:49:02 -0700 From: Boqun Feng To: Kunwu Chan Cc: ojeda@kernel.org, alex.gaynor@gmail.com, gary@garyguo.net, bjorn3_gh@protonmail.com, benno.lossin@proton.me, a.hindborg@kernel.org, aliceryhl@google.com, 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 , Grace Deng Subject: Re: [PATCH v2] rust: sync: optimize Rust symbol generation for PollCondVar Message-ID: References: <20250317025205.2366518-1-kunwu.chan@linux.dev> Precedence: bulk X-Mailing-List: rust-for-linux@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline 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 > > 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 ::new::{closure#0}::{closure#0}::panic_cold_explicit > ... T ::drop > ... T ::drop > > This Rust symbol > (::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 > Co-developed-by: Grace Deng > Signed-off-by: Grace Deng > Signed-off-by: Kunwu Chan > Queued for future tests and reviews. Thanks! Regards, Boqun > --- > Changes in v2: > - Add link and Suggested-by > - Reword commit msg > --- > rust/kernel/sync/poll.rs | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/rust/kernel/sync/poll.rs b/rust/kernel/sync/poll.rs > index d5f17153b424..a4f92c545fec 100644 > --- a/rust/kernel/sync/poll.rs > +++ b/rust/kernel/sync/poll.rs > @@ -107,6 +107,7 @@ fn deref(&self) -> &CondVar { > > #[pinned_drop] > impl PinnedDrop for PollCondVar { > + #[inline] > fn drop(self: Pin<&mut Self>) { > // Clear anything registered using `register_wait`. > // > -- > 2.43.0 >