The top line of every new file is a descriptive comment. You don't need #include <errno.h> in that file.
- [PATCH,HURD] implement syncfs Pino Toscano
- Re: [PATCH,HURD] implement syncfs Roland McGrath
- Re: [PATCH,HURD] implement syncfs Christoph Hellwig
- Re: [PATCH,HURD] implement syncfs Roland McGrath
- Re: [PATCH,HURD] implement syncfs Pino Toscano
- Re: [PATCH,HURD] implement syncfs Roland McGrath