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Date: Fri, 10 Feb 2012 15:11:28 +0200
Message-ID: <CACVxJT9gf0NkAuWWe02Q59HbjRB2WAJLJiRrrrFy5a46+po0eQ@mail.gmail.com>
Subject: Re: [PATCH RFC v2] slab: introduce kmalloc_array
From: Alexey Dobriyan <adobriyan@gmail.com>
To: Xi Wang <xi.wang@gmail.com>
Cc: Jens Axboe <axboe@kernel.dk>, Pekka Enberg <penberg@kernel.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Dan Carpenter <dan.carpenter@oracle.com>, linux-kernel@vger.kernel.org,
        Christoph Lameter <cl@linux.com>, Matt Mackall <mpm@selenic.com>,
        David Rientjes <rientjes@google.com>
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On Fri, Feb 10, 2012 at 4:09 PM, Alexey Dobriyan <adobriyan@gmail.com> wrote:
> On Thu, Feb 9, 2012 at 4:48 PM, Xi Wang <xi.wang@gmail.com> wrote:
>> -static inline void *kcalloc(size_t n, size_t size, gfp_t flags)
>> +static inline void *kmalloc_array(size_t n, size_t size, gfp_t flags)
>>  {
>>        if (size != 0 && n > ULONG_MAX / size)
>>                return NULL;
>> -       return __kmalloc(n * size, flags | __GFP_ZERO);
>> +       return __kmalloc(n * size, flags);
>> +}
>
> It should be named kaalloc(), I think.
> Why it is ULONG_MAX, when size_t is used?

Also, it could be written more "robust" against people who will make
sizeof() the first argument with __builtin_constant_p().
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