linux-kernel - Re: [PATCH/RFC] introduce ARCH_CAN_UNALIGNED

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Message-ID: <20080320181310.GA17884@uranus.ravnborg.org>
Date:	Thu, 20 Mar 2008 19:13:10 +0100
From:	Sam Ravnborg <sam@...nborg.org>
To:	Johannes Berg <johannes@...solutions.net>
Cc:	Daniel Drake <dsd@...too.org>,
	Linux Kernel list <linux-kernel@...r.kernel.org>,
	linux-wireless <linux-wireless@...r.kernel.org>,
	netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH/RFC] introduce ARCH_CAN_UNALIGNED_ACCESS Kconfig symbol

On Thu, Mar 20, 2008 at 03:34:55PM +0100, Johannes Berg wrote:
> In many cases, especially in networking, it can be beneficial to
> know at compile time whether the architecture can do unaligned
> accesses. This patch introduces a new Kconfig symbol
> 	ARCH_CAN_UNALIGNED_ACCESS

Can we please have a single symbol defined and name it:
HAVE_*

Then the architectures that HAVE this feature can select the symbol.

So somewhere in maybe lib/Kconfig or maybe arch/Kconfig add:

config HAVE_UNALIGNED_ACCESS_SUPPORT
	bool

And then for x86 select the symbol:

 config X86
+	select HAVE_UNALIGNED_ACCESS_SUPPORT


This follows the suggestion as available in
Documentation/kbuild/kconfig-language.txt

	Sam
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