[PATCH V2] Use MACRO UINT_MAX instead of actual value

[Jens Axboe]

On 05/17/2016 01:58 AM, Minfei Huang wrote:
> It's more elegant to use MACRO UINT_MAX to represent the max value of
> type unsigned int. So replace the actual value by using this MACRO.

Added for 4.8, thanks.

-- 
Jens Axboe