From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Miller <davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>
Subject: Re: [PATCH 03/15] batman-adv: add
	biggest_unsigned_int(x) macro
Date: Wed, 25 Apr 2012 14:09:04 -0400 (EDT)
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From: "David Laight" <David.Laight-ZS65k/vG3HxXrIkS9f7CXA@public.gmane.org>
Date: Wed, 25 Apr 2012 15:57:39 +0100

>  
>> > +/* Returns the biggest unsigned integer with the sizeof x */
>> > +#define biggest_unsigned_int(x) (~(x)0)
>> 
>> Nope - biggest_unsigned_int(unsigned char) is probably 0xffffffff
> 
> To correct myself, it is actually ((int)(-1)) (ie a signed value).

In any event this is just a terrible macro, and too stupid to live.