Eventually hex_to_bin() method implementation has been applied to Linux kernel mainstream.
Ну вот, с сегодняшнего дня hex_to_bin() официально в Linux kernel.
P.S. Я
уже писал ранее про возможности попатчить ядро... :)
Update. One guy had started
a little discussion in LKML about efficiency of the 'tolower()' vs. 'if condition'. Without optimization the tolower() is slower.