Kernel commit d35a00b8e33dab7385f724e713ae71c8be0a49f4 breaks wireguard

[Bruno Wolff III]

On Mon, Feb 27, 2017 at 16:14:44 -0600,
  Bruno Wolff III <bruno at wolff.to> wrote:
>On Mon, Feb 27, 2017 at 14:10:18 -0800,
> "Jason A. Donenfeld" <Jason at zx2c4.com> wrote:
>>Thanks! I wasn't compiling with the options to hit this, so I didn't
>>see it before. Should be fixed now.
>
>Thank you.
>
>It now builds cleanly and it at least appears to be working correctly 
>in simple testing.

I am now having a problem building it on a 4.10 kernel. (I already have 
a build from the weekend, so I don't need this to make anything work 
right now.)

This is from another Fedora machine that I haven't switched to a 4.11 
kernel yet. The base system for this one is F25, the one that it work 
on was f26/rawhide and has a gcc 7 version. This one has gcc-6.3.1-1.fc25.i686.

make -C /lib/modules/4.10.0-1.fc26.i686+PAE/build M=/home/bruno/WireGuard/src modules
make[1]: Entering directory '/usr/src/kernels/4.10.0-1.fc26.i686+PAE'
  CC [M]  /home/bruno/WireGuard/src/main.o
In file included from <command-line>:0:0:
/home/bruno/WireGuard/src/compat/compat.h:165:40: warning: ‘struct sk_buff’ declared inside parameter list will not be visible outside of this definition or declaration
 static inline void skb_reset_tc(struct sk_buff *skb)
                                        ^~~~~~~
/home/bruno/WireGuard/src/compat/compat.h: In function ‘skb_reset_tc’:
/home/bruno/WireGuard/src/compat/compat.h:168:5: error: dereferencing pointer to incomplete type ‘struct sk_buff’
  skb->tc_verd = 0;
     ^~