linux-kernel - Re: kexec: device shutdown vs. remove

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Date:	Sun, 24 Jul 2016 16:36:57 -0500
From:	ebiederm@...ssion.com (Eric W. Biederman)
To:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
Cc:	Guenter Roeck <linux@...ck-us.net>,
	"linux-kernel\@vger.kernel.org" <linux-kernel@...r.kernel.org>,
	Joel Stanley <joel.stanley@....ibm.com>,
	Jeremy Kerr <jeremy.kerr@....ibm.com>,
	Greg KH <gregkh@...uxfoundation.org>
Subject: Re: kexec: device shutdown vs. remove

Benjamin Herrenschmidt <benh@...nel.crashing.org> writes:

> On Sat, 2016-07-23 at 22:18 -0700, Guenter Roeck wrote:
>> I suspect that using (or depending on) the remove function may not be feasible
>> anymore after the recent effort by Paul Gortmaker to make drivers explicitly
>> non-modular if they are only configurable as boolean. In many cases, this
>> involved dropping remove functions.
>
> A lot of drivers we care about are modular. But maybe the right
> approach is to do something like remove() if it exist and shutdown() if
> it doesn't ? Or a new callback for kexec ? quiesce() ?

Perhaps remove if shutdown does not exist.  What this really takes is
someone to care enough to sort through this mess.

Eric