[compiling kernel]: dnsdomainname: Unknown host
 

When compiling kernel, the screen outputs:
dnsdomainname: Unknown host
include/asm/byteorder.h:5:28: error: linux/compiler.h: No such file or directory

Though the compiling is still successful, these errors annoy me, how can I eliminate this problem? It seems that many others have the same problem, but I did not find an effective solution.

Thanks,

Shawn