On Sat, Nov 24, 2018 at 04:34:22AM +0200, Nikolay Aleksandrov wrote: > Now that we have at least one bool option, we can export all of the > supported bool options via optmask when dumping them. > Hi Nik That answers my question then... I'm assuming this means there is no easy way to generate a bitmask of 0? So you waited until there was at least one bit. (1 << 2) - 1 = 3 (1 << 1) - 1 = 1 (1 << 0) - 1 = 0 So does GENMASK((BR_BOOLOPT_MAX - 1), 0); really not do the right thing when BR_BOOLOPT_MAX = 1? Andrew