kernel_noattr.rs:4:5: error: Compute kernel root() is required to return a void type
kernel_noattr.rs:4:5: error: Compute kernel root() must have at least one parameter for in or out
kernel_noattr.rs:11:5: error: invokable non-static functions are required to return void
kernel_noattr.rs:15:5: error: invokable non-static functions are required to return void