linux-kernel - Re: [RFC][PATCH 2/3] math128: Introduce {mult,add,cmp}

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Message-ID: <1335341466.28150.248.camel@twins>
Date:	Wed, 25 Apr 2012 10:11:06 +0200
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	Stephen Rothwell <sfr@...b.auug.org.au>
Cc:	linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Juri Lelli <juri.lelli@...il.com>,
	Ingo Molnar <mingo@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [RFC][PATCH 2/3] math128: Introduce {mult,add,cmp}_u128

On Wed, 2012-04-25 at 10:23 +1000, Stephen Rothwell wrote:
> Isn't this what asm-generic is for?  You put the generic version in
> asm-generic/math128.h and then add "generic-y += math128.h" to
> arch/*/include/asm/Kbuild for each arch that wants the generic version.
> Then just include asm/math128.h in linux/math128.h.  Any arch that wants
> to optimise these can then just provide its own math128.h. 

Ah, right. I didn't know that Kbuild trick. /me does:

  ls arch/*/include/asm/Kbuild | while read file; do quilt add $file;
echo "generic-y += math128.h" >> $file; done

Thanks!
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