mistake when i brunch n7100

when i use cm12 for n7100. i brunch n7100 and got the error: could not load kernel '/cm12/out/target/product/n7100/kernel'
make: * [/cm12/out/target/product/n7100/boot.img] 错误 1
I have download the kernel from the github, and copy the kernel in the out/target/product/n7100/kernel.
could you give me some suggestion about this ?
thanks advance