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[82.69.66.36]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-48db650fd4bsm478599f8f.11.2026.10.08.09.12.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 08 Oct 2026 09:12:07 -0700 (PDT) Date: Thu, 8 Oct 2026 17:12:05 +0100 From: David Laight To: "Serge E. Hallyn" Cc: Gregory Price , Sasha Levin , linux-api@vger.kernel.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kbuild@vger.kernel.org, linux-kselftest@vger.kernel.org, workflows@vger.kernel.org, tools@kernel.org, x86@kernel.org, Thomas Gleixner , "Paul E . McKenney" , Greg Kroah-Hartman , Jonathan Corbet , Dmitry Vyukov , Randy Dunlap , Cyril Hrubis , Kees Cook , Jake Edge , Gabriele Paoloni , Mauro Carvalho Chehab , Christian Brauner , Alexander Viro , Andrew Morton , Masahiro Yamada , Shuah Khan , Arnd Bergmann , Nathan Chancellor , Steven Rostedt , Masami Hiramatsu , Mathieu Desnoyers Subject: Re: [PATCH v5 05/11] kernel/api: add API specification for sys_open Message-ID: <20261008171205.7239c463@pumpkin> In-Reply-To: References: <20261008084956.2911790-1-sashal@kernel.org> <20261008084956.2911790-6-sashal@kernel.org> X-Mailer: Claws Mail 4.1.1 (GTK 3.24.38; arm-unknown-linux-gnueabihf) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit On Thu, 8 Oct 2026 09:20:01 -0500 "Serge E. Hallyn" wrote: ... > > Even if there's just a three line comment above a fn, history proves > that it will not reliably stay in sync as the fn changes. An automation > step/check is needed. The only way it can possibly stay in step is to have the compiler process the same source text. Then, if you add/change a function parameter you'd be pretty much forced to add/change the comment. Return values would have to be documented at the C return statement and really as an extra parameter to the return. But, IMHO, the whole thing adds too much bloat to the source files. When you 'grep' a source file, you don't really want another match in a big comment at the top of every function. David > > > ~Gregory