linux-kernel - Re: [PATCH v4 3/4] block: add support for notifications

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Message-ID: <Zn4_-alKtxuZ6zNt@infradead.org>
Date: Thu, 27 Jun 2024 21:45:45 -0700
From: Christoph Hellwig <hch@...radead.org>
To: Daniel Golle <daniel@...rotopia.org>
Cc: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Ulf Hansson <ulf.hansson@...aro.org>, Jens Axboe <axboe@...nel.dk>,
	Hauke Mehrtens <hauke@...ke-m.de>, Felix Fietkau <nbd@....name>,
	Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
	Dave Chinner <dchinner@...hat.com>, Jan Kara <jack@...e.cz>,
	Christian Brauner <brauner@...nel.org>,
	Thomas Weißschuh <linux@...ssschuh.net>,
	Al Viro <viro@...iv.linux.org.uk>,
	Li Lingfeng <lilingfeng3@...wei.com>,
	Christian Heusel <christian@...sel.eu>,
	Min Li <min15.li@...sung.com>, Avri Altman <avri.altman@....com>,
	Adrian Hunter <adrian.hunter@...el.com>,
	Hannes Reinecke <hare@...e.de>,
	Mikko Rapeli <mikko.rapeli@...aro.org>, Yeqi Fu <asuk4.q@...il.com>,
	Victor Shih <victor.shih@...esyslogic.com.tw>,
	Christophe JAILLET <christophe.jaillet@...adoo.fr>,
	Li Zhijian <lizhijian@...itsu.com>,
	"Ricardo B. Marliere" <ricardo@...liere.net>,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-mmc@...r.kernel.org, linux-block@...r.kernel.org
Subject: Re: [PATCH v4 3/4] block: add support for notifications

On Thu, Jun 27, 2024 at 09:50:50PM +0100, Daniel Golle wrote:
> Add notifier block to notify other subsystems about the addition or
> removal of block devices.

Notification for what?  I really hate the concept of random modular
code being able to hook into device discovery / partition scanning.
And not actually having a user for it is a complete no-go.