DragonFlyBSD

sys/dev/powermng/powernow/powernow.c:284]: (style) Checking if unsigned variable 'vco_fid-vco_cfid' is less than zero.

Source code is

while (abs(vco_fid - vco_cfid) > 2) {

but

uint32_t    vco_fid, vco_cfid;

which means the expression given to abs is unsigned.
So the code only seems to do a one-sided test.