linux-kernel - Re: [PATCH v2 08/34] locking/rwlock, spinlock: Support Clang's capability analysis

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Message-ID: <20250304143029.GG11590@noisy.programming.kicks-ass.net>
Date: Tue, 4 Mar 2025 15:30:29 +0100
From: Peter Zijlstra <peterz@...radead.org>
To: Marco Elver <elver@...gle.com>
Cc: "David S. Miller" <davem@...emloft.net>,
	Luc Van Oostenryck <luc.vanoostenryck@...il.com>,
	"Paul E. McKenney" <paulmck@...nel.org>,
	Alexander Potapenko <glider@...gle.com>,
	Arnd Bergmann <arnd@...db.de>, Bart Van Assche <bvanassche@....org>,
	Bill Wendling <morbo@...gle.com>, Boqun Feng <boqun.feng@...il.com>,
	Dmitry Vyukov <dvyukov@...gle.com>,
	Eric Dumazet <edumazet@...gle.com>,
	Frederic Weisbecker <frederic@...nel.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Herbert Xu <herbert@...dor.apana.org.au>,
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	Jiri Slaby <jirislaby@...nel.org>,
	Joel Fernandes <joel@...lfernandes.org>,
	Jonathan Corbet <corbet@....net>,
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	Steven Rostedt <rostedt@...dmis.org>,
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	Uladzislau Rezki <urezki@...il.com>,
	Waiman Long <longman@...hat.com>, Will Deacon <will@...nel.org>,
	kasan-dev@...glegroups.com, linux-kernel@...r.kernel.org,
	llvm@...ts.linux.dev, rcu@...r.kernel.org,
	linux-crypto@...r.kernel.org, linux-serial@...r.kernel.org
Subject: Re: [PATCH v2 08/34] locking/rwlock, spinlock: Support Clang's
 capability analysis

On Tue, Mar 04, 2025 at 10:21:07AM +0100, Marco Elver wrote:

> To avoid warnings in constructors, the initialization functions mark a
> capability as acquired when initialized before guarded variables.

Right, took me a bit, but OMG that's a horrific hack :-)