From mboxrd@z Thu Jan  1 00:00:00 1970
From: Matthew Wilcox <matthew@wil.cx>
Subject: Re: [PATCH] bitops.h: Widen BIT macro to support 64-bit types
Date: Thu, 14 Oct 2010 05:12:13 -0600
Message-ID: <20101014111213.GO10421@parisc-linux.org>
References: <20101013131057.88238be6.randy.dunlap@oracle.com> <20101014042409.GB29342@aftab> <20101014105855.GB31247@aftab>
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To: Borislav Petkov <bp@amd64.org>
Cc: Randy Dunlap <randy.dunlap@oracle.com>, Linus Torvalds <torvalds@linux-foundation.org>, lkml <linux-kernel@vger.kernel.org>, Doug Thompson <dougthompson@xmission.com>, akpm <akpm@linux-foundation.org>, linux-arch@vger.kernel.org

On Thu, Oct 14, 2010 at 12:58:55PM +0200, Borislav Petkov wrote:
>  #ifdef	__KERNEL__
> -#define BIT(nr)			(1UL << (nr))
> +#define BIT(nr)			(U64_C(1) << (nr))

Why not just use 1ULL instead?

-- 
Matthew Wilcox				Intel Open Source Technology Centre
"Bill, look, we understand that you're interested in selling us this
operating system, but compare it to ours.  We can't possibly take such
a retrograde step."