linux-kernel - Re: [PATCH] i2c: core: Workaround false-positive LOCKDEP in delete

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Date:   Sat, 21 May 2022 11:50:38 +0200
From:   Wolfram Sang <wsa@...nel.org>
To:     Alexander A Sverdlin <alexander.sverdlin@...ia.com>
Cc:     linux-i2c@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] i2c: core: Workaround false-positive LOCKDEP in
 delete_device


> +			/*
> +			 * We drop the mutex here, because device unregister
> +			 * will take sysfs lock (kn->count) which, as LOCKDEP
> +			 * would think, depends on this mutex
> +			 */

I have to ask: can't lockdep be fixed or the lock somehow be annotated
to prevent the false positive?


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