linux-kernel - Re: [PATCH] configfs: change depends -> select SYSFS

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Message-ID: <20110116231901.GF22723@ZenIV.linux.org.uk>
Date:	Sun, 16 Jan 2011 23:19:01 +0000
From:	Al Viro <viro@...IV.linux.org.uk>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Stefan Richter <stefanr@...6.in-berlin.de>,
	"Nicholas A. Bellinger" <nab@...ux-iscsi.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	linux-scsi <linux-scsi@...r.kernel.org>,
	linux-fsdevel <linux-fsdevel@...r.kernel.org>,
	Joel Becker <jlbec@...lplan.org>,
	Randy Dunlap <randy.dunlap@...cle.com>,
	James Bottomley <James.Bottomley@...e.de>
Subject: Re: [PATCH] configfs: change depends -> select SYSFS

On Sun, Jan 16, 2011 at 03:11:57PM -0800, Linus Torvalds wrote:
> Why the hell should a OCFS2 user have to know that he needs to enable
> configfs to be able to enable ocfs2?
> 
> The thing is, we should do exactly the reverse of what you say, and
> work towards the goal of "depends on" going away. Right now, the main
> reason to use "depends on" is actually just that our Kconfig solvers
> are stupid, and don't generally handle "select" very well. But that's
> hopefully getting fixed.

How do you eliminate things like "it really depends on having DMA"?
When we configure e.g. s390 or uml kernel, it's not like we could
enable a PCI driver and have architecture magically switch to a
PCI-supporting one, after all...
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