linux-kernel - Re: [PATCH] Export current_is

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Message-ID: <20551.1165428139@redhat.com>
Date:	Wed, 06 Dec 2006 18:02:19 +0000
From:	David Howells <dhowells@...hat.com>
To:	Linus Torvalds <torvalds@...l.org>
Cc:	David Howells <dhowells@...hat.com>, Andrew Morton <akpm@...l.org>,
	"Maciej W. Rozycki" <macro@...ux-mips.org>,
	Roland Dreier <rdreier@...co.com>,
	Andy Fleming <afleming@...escale.com>,
	Ben Collins <ben.collins@...ntu.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Jeff Garzik <jeff@...zik.org>
Subject: Re: [PATCH] Export current_is_keventd() for libphy 

Linus Torvalds <torvalds@...l.org> wrote:

> test_bit() with a constant number is done very much in C, and very much on 
> purpose. _Exactly_ to allow the compiler to combine these kinds of things.

Ah...  I've read that several times, and each time I've assumed it's referring
to *addr not nr as being constant.

David
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