[IPv4] Check PAGE_SIZE in fz_hash_alloc

[Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>]

On Tue, Sep 21, 2004 at 07:32:34PM -0700, David S. Miller wrote:
> 
> I'll apply this, thanks Herbert.

Thanks.

Here is a minor optimisation to fz_hash_alloc.  The break-even point
should be based on PAGE_SIZE rather than the value of divisor.

Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>

Cheers,
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