linux-kernel - Re: Kconfig circular dependency question

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Date:	Sun, 06 Apr 2014 22:52:55 +0200
From:	Paul Bolle <pebolle@...cali.nl>
To:	Randy Dunlap <rdunlap@...radead.org>
Cc:	Larry Finger <Larry.Finger@...inger.net>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: Kconfig circular dependency question

On Sun, 2014-04-06 at 13:31 -0700, Randy Dunlap wrote:
> and/or changing MOUSE_APPLETOUCH to depend on USB instead of select it?

MOUSE_APPLETOUCH selects USB and depends on USB_ARCH_HAS_HCD. That's
actually quite a common pattern.

But what is the purpose of USB_ARCH_HAS_HCD? It is set by default if
USB_SUPPORT is set. And USB depends on it, but since USB also depends on
USB_SUPPORT that seems superfluous.

My slow day continues, because I find this hard to grok.

Paul Bolle

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