BUILD_BUG_ON_NOT_POWER_OF_2   16 include/linux/bug.h #define BUILD_BUG_ON_NOT_POWER_OF_2(n) (0)
BUILD_BUG_ON_NOT_POWER_OF_2   26 include/linux/bug.h #define BUILD_BUG_ON_NOT_POWER_OF_2(n)			\