RE: [PATCH] fix alloc_large_system_hash roundup

["Chen, Kenneth W" <kenneth.w.chen@intel.com>]

Roland Dreier wrote on Wednesday, March 15, 2006 9:41 AM
> >  	/* rounded up to nearest power of 2 in size */
> > -	numentries = 1UL << (long_log2(numentries) + 1);
> > +	numentries = 1UL << (long_log2(2*numentries - 1));
> 
> How about just using roundup_pow_of_two()?  You could kill the comment
> too then.

roundup_pow_of_two uses fls, but fls takes an "int" argument.  I think
that function is buggy on 64-bit arch. Is it an oversight or something?


static inline unsigned long roundup_pow_of_two(unsigned long x)
{
        return (1UL << fls(x - 1));
}

- Ken

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