Message-ID: <4576F368.4070804@zytor.com>
Date: Wed, 06 Dec 2006 08:44:24 -0800
From: "H. Peter Anvin" <hpa@zytor.com>
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To: Samuel Thibault <samuel.thibault@ens-lyon.org>,
       "H. Peter Anvin" <hpa@zytor.com>,
       Arjan van de Ven <arjan@infradead.org>, linux-kernel@vger.kernel.org
Subject: Re: Linux should define ENOTSUP
References: <20061206135134.GJ3927@implementation.labri.fr> <1165415115.3233.449.camel@laptopd505.fenrus.org> <4576DED7.10800@zytor.com> <20061206152542.GS3927@implementation.labri.fr> <4576E134.5020109@zytor.com> <20061206153404.GU3927@implementation.labri.fr> <4576E355.7080708@zytor.com> <20061206161405.GV3927@implementation.labri.fr>
In-Reply-To: <20061206161405.GV3927@implementation.labri.fr>
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Samuel Thibault wrote:
> H. Peter Anvin, le Wed 06 Dec 2006 07:35:49 -0800, a ?crit :
>> Samuel Thibault wrote:
>>>> The two can't be done at the same time.  In fact, the two probably can't 
>>>> be done without a period of quite a few *years* between them.
>>> Not a reason for not doing it ;)
>> No, but breakage is.  There has to be a major benefit to justify the 
>> cost, and you, at least, have not provided such a justification.
> 
> Well, as I said, existing code like
> 
> switch(errno) {
> 	case ENOTSUP:
> 		foo();
> 		break;
> 	case EOPNOTSUP:
> 		bar();
> 		break;
> }
> 

That's pretty weak, though.

	-hpa
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