On Tue, Jan 08, 2013 at 01:38:55PM -0500, Christoffer Dall wrote: > + /* -ENOENT for unknown features, -EINVAL for invalid combinations. */ > + for (i = 0; i < sizeof(init->features)*8; i++) { > + if (init->features[i / 32] & (1 << (i % 32))) { Isn't this an open-coded version of test_bit() ?