explicitly set WARNS for modules that fail with WARNS=5.
Also, turn on -Wno-missing-noreturn for clang for some files.
At the moment, among ~ 360 modules,
- 2 (lua and zfs) need WARNS=0
- 1 (solaris) needs WARNS=1
- 136 need WARNS=3 (mostly due to sign-compare)
- 4 need WARNS=4
- others can be compiled with WARNS=5
Discussed on tech-kern.
Raspberry Pi 3 B+, from OpenBSD.
Tested on Raspberry Pi 3 B+ (LAN7800) and Z-TEK ZE582 (LAN7500).
* BUGS/TODO
- If the media type is set to something other than 1000baseT-FDX, data
transmission becomes quite unstable. Also, ukphy(4) recognize 1000baseT as
a supported media type, but it is not in fact.
- Catch up with changes made to usmsc(4) in nick-nhusb branch, i.e.,
make the driver MP-safe.
- Support RX/VLAN/TX chekcsum offloading.
