From: Harvey Harrison <harvey.harrison@gmail.com>
To: NeilBrown <neilb@suse.de>
Cc: "J. Bruce Fields" <bfields@fieldses.org>,
Andrew Morton <akpm@linux-foundation.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] nfs: replace uses of __constant_{endian}
Date: Wed, 11 Feb 2009 18:52:31 -0800 [thread overview]
Message-ID: <1234407151.5566.21.camel@brick> (raw)
In-Reply-To: <2540bee2375afb6f08eb92d19e7a1bf0.squirrel@neil.brown.name>
On Thu, 2009-02-12 at 13:50 +1100, NeilBrown wrote:
> On Thu, February 12, 2009 12:16 pm, Harvey Harrison wrote:
> > The base versions handle constant folding now, none of these headers
> > are exported to userspace, so the __ prefixed versions are not
> > necessary.
>
> I assume you compile tested this?
>
> I seem to recall that the reason we did it that way was that
> some of the error codes are used in switch statements, and
> the value for a 'case:' really has to look like a constant, not just
> happen to evaluate to one.
Yes, this requirement was explicitly built-in. See how the various
__swabXX bits are done in linux/swab.h.
Harvey
next prev parent reply other threads:[~2009-02-12 2:52 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-02-12 1:16 [PATCH] nfs: replace uses of __constant_{endian} Harvey Harrison
2009-02-12 2:50 ` NeilBrown
2009-02-12 2:52 ` Harvey Harrison [this message]
2009-02-12 3:15 ` NeilBrown
2009-02-12 22:17 ` J. Bruce Fields
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