Created attachment 267391 [details] build.log
Created attachment 267393 [details] emerge --info
The file smp_lock.h has beed removed from the newest git-sources,and make the nvidia-drivers compiles fail.when i got a file smp_lock.h and put it in /usr/src/linux/inlcude/,it goes well.
It seems that we can do nothing but waitting for the update from nvidia,because the nvidia-drivers are close-sourced.