Re: [PATCH RFC v2] slab: introduce kmalloc_array

[Andrew Morton]

On Thu, 9 Feb 2012 14:42:49 -0800 (PST)
David Rientjes <rientjes@xxxxxxxxxx> wrote:

> On Thu, 9 Feb 2012, Xi Wang wrote:
> 
> > This patch introduces a kmalloc_array() wrapper that performs integer
> > overflow checking without zeroing the memory.
> > 
> > Suggested-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
> > Suggested-by: Jens Axboe <axboe@xxxxxxxxx>
> > Signed-off-by: Xi Wang <xi.wang@xxxxxxxxx>
> 
> Acked-by: David Rientjes <rientjes@xxxxxxxxxx>
> 
> assuming there's at least one new user or one existing user that can be 
> modified to use the new interface and this won't just sit around not being 
> used.

The need is there - I've whined about the absence of kmalloc_array()
maybe 3 times in the past year.

Often kcalloc() is suitable - quite a lot of arrays which are sized
based on a userspace-provided dimension are also zeroed out.  For some
reason.

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