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From: Al Viro <viro@ZenIV.linux.org.uk>
Subject: Re: [PATCH] configfs: change depends -> select SYSFS
Date: Sun, 16 Jan 2011 23:19:01 +0000
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Cc: Stefan Richter <stefanr@s5r6.in-berlin.de>,
	"Nicholas A. Bellinger" <nab@linux-iscsi.org>,
	linux-kernel <linux-kernel@vger.kernel.org>,
	linux-scsi <linux-scsi@vger.kernel.org>,
	linux-fsdevel <linux-fsdevel@vger.kernel.org>,
	Joel Becker <jlbec@evilplan.org>,
	Randy Dunlap <randy.dunlap@oracle.com>,
	James Bottomley <James.Bottomley@suse.de>
To: Linus Torvalds <torvalds@linux-foundation.org>
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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...