So, I checked the catalog, and found this: wifi modules was changed.
old path: /system/modules/bcm4329.ko
new path: /system/lib/modules/bcm4329.ko
It will cause your wifi not work with custom kernel.
If your wifi is not work, just make a symbol link, type these command in the terminal:
mount -o remount,rw /system
ln -s /system/modules/bcm4329.ko /system/lib/modules/bcm4329.ko
#Thanks Paragon_X, I forgot to tell you to remount /.
mount -o remount,ro /system
Or, you are the kernel developer, your should put your kernel modules in both path, or link them.