From: Al Viro <viro@ftp.linux.org.uk>
To: David Miller <davem@davemloft.net>
Cc: rdreier@cisco.com, akpm@osdl.org, linux-kernel@vger.kernel.org,
openib-general@openib.org, tom@opengridcomputing.com
Subject: Re: [PATCH] Avoid truncating to 'long' in ALIGN() macro
Date: Sun, 26 Nov 2006 01:10:14 +0000 [thread overview]
Message-ID: <20061126011014.GR3078@ftp.linux.org.uk> (raw)
In-Reply-To: <20061125.150500.14841768.davem@davemloft.net>
On Sat, Nov 25, 2006 at 03:05:00PM -0800, David Miller wrote:
> From: Roland Dreier <rdreier@cisco.com>
> Date: Sat, 25 Nov 2006 14:56:22 -0800
>
> > > Perhaps a better way to fix this is to use
> > > typeof() like other similar macros do.
> >
> > I tried doing
> >
> > #define ALIGN(x,a) \
> > ({ \
> > typeof(x) _a = (a); \
> > ((x) + _a - 1) & ~(_a - 1); \
> > })
> >
> > but that won't compile because of <net/neighbour.h>:
>
> You would need to also cast the constants with typeof() to.
Oh, for fsck sake...
(typeof(x))((x + a - 1) & ~(a - 1ULL))
next prev parent reply other threads:[~2006-11-26 1:10 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-11-25 5:40 [PATCH] Avoid truncating to 'long' in ALIGN() macro Roland Dreier
2006-11-25 6:07 ` David Miller
2006-11-25 22:56 ` Roland Dreier
2006-11-25 23:05 ` David Miller
2006-11-25 23:09 ` Roland Dreier
2006-11-26 0:41 ` Andrew Morton
2006-11-26 19:09 ` Roland Dreier
2006-11-26 19:10 ` Roland Dreier
2006-11-26 19:17 ` Andrew Morton
2006-11-26 20:06 ` Roland Dreier
2006-11-26 20:11 ` Linus Torvalds
2006-11-26 20:26 ` Roland Dreier
2006-11-26 21:06 ` Jörn Engel
2006-11-26 22:20 ` Linus Torvalds
2006-11-27 4:41 ` Al Viro
2006-11-26 1:10 ` Al Viro [this message]
2006-11-26 1:17 ` Roland Dreier
2006-11-26 1:25 ` Al Viro
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