about the _dtype_ parameter

[xiaochuanxv]

Sorry, a mistake in writing: 

(Suppose wr-ratio represent the ratio of erasures due to wear-leveling
to erasure total physical erase-block erasures. )
I found that when most of the @dtype is equal to UBI_SHORTTERM, the
wr-ratio is approximately equal to 0.1%, whereas is greater than
 
0.4% 

when @dtype is always UBI_UNKNOWN. It seem that the data type call-back
policy does NOT make any sense in the current implementation.

-- 
Best regards,
Xiaochuan Xu (许小川)