- Change variable name to 'error', as this is what is mostly used for functions that return an error. - Add mutex(9) to the SEE ALSO section. - Bump the date. I don't really like the example code. I'd prefer symmetry where possible, eg. mtx_lock(&example_lock); error = example(NULL, EXAMPLE_ONE); mtx_unlock(&example_lock); if (error != 0) return (error); But I'll leave it as it is for now. Reviewed by: simon