리눅스 커널모듈 프로그래밍시에 make -C [커널소스] 를 넣어주는 이유는 무었인가요?

make -C [경로] 는 cd [경로] && make 와 같습니다.

$ man make
-C dir, --directory=dir
Change to directory dir before reading the makefiles or doing
anything else. If multiple -C options are specified, each is in‐
terpreted relative to the previous one: -C / -C etc is equivalent
to -C /etc. This is typically used with recursive invocations of
make.