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[103.168.172.200]) by smtp.gmail.com with ESMTPSA id d2-20020ac84e22000000b00430cacfe532sm298900qtw.79.2024.03.22.17.03.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 22 Mar 2024 17:03:36 -0700 (PDT) Received: from compute5.internal (compute5.nyi.internal [10.202.2.45]) by mailfauth.nyi.internal (Postfix) with ESMTP id 5901B1200043; Fri, 22 Mar 2024 20:03:35 -0400 (EDT) Received: from mailfrontend2 ([10.202.2.163]) by compute5.internal (MEProxy); Fri, 22 Mar 2024 20:03:35 -0400 X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedvledruddtfedgudekucetufdoteggodetrfdotf fvucfrrhhofhhilhgvmecuhfgrshhtofgrihhlpdfqfgfvpdfurfetoffkrfgpnffqhgen uceurghilhhouhhtmecufedttdenucesvcftvggtihhpihgvnhhtshculddquddttddmne cujfgurhepfffhvfevuffkfhggtggujgesthdtredttddtvdenucfhrhhomhepuehoqhhu nhcuhfgvnhhguceosghoqhhunhdrfhgvnhhgsehgmhgrihhlrdgtohhmqeenucggtffrrg htthgvrhhnpeehudfgudffffetuedtvdehueevledvhfelleeivedtgeeuhfegueeviedu ffeivdenucevlhhushhtvghrufhiiigvpedtnecurfgrrhgrmhepmhgrihhlfhhrohhmpe gsohhquhhnodhmvghsmhhtphgruhhthhhpvghrshhonhgrlhhithihqdeiledvgeehtdei gedqudejjeekheehhedvqdgsohhquhhnrdhfvghngheppehgmhgrihhlrdgtohhmsehfih igmhgvrdhnrghmvg X-ME-Proxy: Feedback-ID: iad51458e:Fastmail Received: by mail.messagingengine.com (Postfix) with ESMTPA; Fri, 22 Mar 2024 20:03:33 -0400 (EDT) Date: Fri, 22 Mar 2024 17:03:11 -0700 From: Boqun Feng To: Andrew Lunn Cc: rust-for-linux@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, llvm@lists.linux.dev, Miguel Ojeda , Alex Gaynor , Wedson Almeida Filho , Gary Guo , =?iso-8859-1?Q?Bj=F6rn?= Roy Baron , Benno Lossin , Andreas Hindborg , Alice Ryhl , Alan Stern , Andrea Parri , Will Deacon , Peter Zijlstra , Nicholas Piggin , David Howells , Jade Alglave , Luc Maranget , "Paul E. McKenney" , Akira Yokosawa , Daniel Lustig , Joel Fernandes , Nathan Chancellor , Nick Desaulniers , kent.overstreet@gmail.com, Greg Kroah-Hartman , elver@google.com, Mark Rutland , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Catalin Marinas , torvalds@linux-foundation.org, linux-arm-kernel@lists.infradead.org, linux-fsdevel@vger.kernel.org Subject: Re: [WIP 1/3] rust: Introduce atomic module Message-ID: References: <20240322233838.868874-1-boqun.feng@gmail.com> <20240322233838.868874-2-boqun.feng@gmail.com> <068a5983-8216-48a5-9eb5-784a42026836@lunn.ch> Precedence: bulk X-Mailing-List: linux-fsdevel@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: <068a5983-8216-48a5-9eb5-784a42026836@lunn.ch> On Sat, Mar 23, 2024 at 12:52:08AM +0100, Andrew Lunn wrote: > > +//! These primitives should have the same semantics as their C counterparts, for precise definitions > > +//! of the semantics, please refer to tools/memory-model. Note that Linux Kernel Memory > > +//! (Consistency) Model is the only model for Rust development in kernel right now, please avoid to > > +//! use Rust's own atomics. > > Is it possible to somehow poison rusts own atomics? I would not be I can continue to look an elegant way, now since we compile our own `core` crate (where Rust atomic library locates), we can certain do a sed trick to exclude the atomic code from Rust. It's pretty hacky, but maybe others know how to teach linter to help. Regards, Boqun > too surprised if somebody with good Rust knowledge but new to the > kernel tries using Rusts atomics. Either getting the compiler to fail > the build, or it throws an Opps on first invocation would be good. > > Andrew