linux-kernel - Re: [patch] hugetlb: remove dummy definitions of HPAGE_MASK and HPAGE

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Date:	Mon, 21 Nov 2011 15:23:47 -0800
From:	David Daney <ddaney@...iumnetworks.com>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
CC:	David Daney <ddaney.cavm@...il.com>,
	David Rientjes <rientjes@...gle.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"linux-mips@...ux-mips.org" <linux-mips@...ux-mips.org>,
	"ralf@...ux-mips.org" <ralf@...ux-mips.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	David Daney <david.daney@...ium.com>,
	"linux-arch@...r.kernel.org" <linux-arch@...r.kernel.org>,
	Robin Holt <holt@....com>
Subject: Re: [patch] hugetlb: remove dummy definitions of HPAGE_MASK and HPAGE_SIZE

On 11/21/2011 02:43 PM, Linus Torvalds wrote:
> On Mon, Nov 21, 2011 at 2:23 PM, David Daney<ddaney.cavm@...il.com>  wrote:
>>
>> This whole comment strikes me as somewhat dishonest, as at the time David
>> Rientjes wrote it, he knew that there were dependencies on these symbols in
>> the linux-next tree.
>>
>> Now we can add these:
>> +#define HPAGE_SHIFT    ({ BUG(); 0; })
>> +#define HPAGE_SIZE     ({ BUG(); 0; })
>> +#define HPAGE_MASK     ({ BUG(); 0; })
>
> Hell no.
>
> We don't do run-time BUG() things. No way, no how.
>
> If that #define cannot be used, then it damn well shouldn't be defined at all.
>
> David's patch is clearly the right thing to do. Don't try to send me
> the above kind of insane crap.
>

Ok Linus, for you I would recommend against running this git command on 
your tree:

git grep -E '#define.+BUG\(\);'

It's not like there isn't precedence.

David Daney
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