linux-kernel - Re: [PATCH 02/32] locking/lockdep: lock_class_is

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Message-ID: <20230509193039.GB2148518@hirez.programming.kicks-ass.net>
Date:   Tue, 9 May 2023 21:30:39 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Kent Overstreet <kent.overstreet@...ux.dev>
Cc:     linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-bcachefs@...r.kernel.org,
        Kent Overstreet <kent.overstreet@...il.com>,
        Ingo Molnar <mingo@...hat.com>, Will Deacon <will@...nel.org>,
        Waiman Long <longman@...hat.com>,
        Boqun Feng <boqun.feng@...il.com>
Subject: Re: [PATCH 02/32] locking/lockdep: lock_class_is_held()

On Tue, May 09, 2023 at 12:56:27PM -0400, Kent Overstreet wrote:
> From: Kent Overstreet <kent.overstreet@...il.com>
> 
> This patch adds lock_class_is_held(), which can be used to assert that a
> particular type of lock is not held.

How is lock_is_held_type() not sufficient? Which is what's used to
implement lockdep_assert_held*().