CLAMP(9) Driver Basics CLAMP(9)
NAME clamp - return a value clamped to a given range with strict typechecking
SYNOPSIS clamp(val, min, max);
ARGUMENTS val current value
min minimum allowable value
max maximum allowable value
DESCRIPTION This macro does strict typechecking of min/max to make sure they are of the same type as val. See the unnecessary pointer comparisons.
COPYRIGHT Kernel Hackers Manual 2.6. January 2013 CLAMP(9)