linux-kernel - Re: [PATCH] MPILIB: Provide count_leading/trailing

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Message-Id: <201207201353.34324.arnd@arndb.de>
Date:	Fri, 20 Jul 2012 13:53:33 +0000
From:	Arnd Bergmann <arnd@...db.de>
To:	David Howells <dhowells@...hat.com>
Cc:	linux-security-module@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	"David S. Miller" <davem@...emloft.net>,
	Dmitry Kasatkin <dmitry.kasatkin@...el.com>
Subject: Re: [PATCH] MPILIB: Provide count_leading/trailing_zeros() based on arch functions

On Friday 20 July 2012, David Howells wrote:
> Provide count_leading/trailing_zeros() macros based on extant arch bit scanning
> functions rather than reimplementing from scratch in MPILIB.
> 
> Whilst we're at it, turn count_foo_zeros(n, x) into n = count_foo_zeros(x).
> 
> Also move the definition to asm-generic as other people may be interested in
> using it.
> 
> Signed-off-by: David Howells <dhowells@...hat.com>
> Cc: David S. Miller <davem@...emloft.net>
> Cc: Dmitry Kasatkin <dmitry.kasatkin@...el.com>
> Cc: Arnd Bergmann <arnd@...db.de>

I don't generally like to put stuff into asm-generic when it's unlikely
to be overridden by architectures. It would really belong into
include/linux, but then again we have all the other bitops in asm-generic
as well, so whatever...

Acked-by: Arnd Bergmann <arnd@...db.de>
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