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From: Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl>
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Subject: Re: FreeBSD & Software RAID
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> I haven't looked at the ZFS code but this sort of thing is exactly why
> all code I write uses int8_t, int16_t, int32_t, uint8_t, ... even when
> the first thing I have to do with a new compiler is to work out the
> proper typedefs to create them.

int, short and char are portable, only other things must be defined this 
way.

int8_t int16_t is just unneeded work. anyway - it's just defines, having 
no effect on compiled code and it's performance.