linux-kernel - Re: [PATCH RFC v2] slab: introduce kmalloc

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Message-ID: <20120211121923.GA3341@p183.telecom.by>
Date:	Sat, 11 Feb 2012 15:19:23 +0300
From:	Alexey Dobriyan <adobriyan@...il.com>
To:	Xi Wang <xi.wang@...il.com>
Cc:	Jens Axboe <axboe@...nel.dk>, Pekka Enberg <penberg@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Dan Carpenter <dan.carpenter@...cle.com>,
	linux-kernel@...r.kernel.org, Christoph Lameter <cl@...ux.com>,
	Matt Mackall <mpm@...enic.com>,
	David Rientjes <rientjes@...gle.com>
Subject: Re: [PATCH RFC v2] slab: introduce kmalloc_array

On Fri, Feb 10, 2012 at 09:09:09AM -0500, Xi Wang wrote:
> On Feb 10, 2012, at 8:58 AM, Alexey Dobriyan wrote:
> > No,
> > 
> > If one dimension is constant, limit should be divided by it, so
> > compiler would have less chance
> > to screw up compile time evaluation.
> 
> I think the BUILD_BUG_ON macro can prevent that misuse.

But there is no misuse.

Both kaalloc(non-const, const) and kaalloc(const, non-const) are OK.
It's just first case happens more often.
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