kernel-sweet-lineage

Guide

• Install prerequisites - build dependencies, and select a cross-compiler. See Kernels - Common stuff. 
• Clone the kernel source.

git clone https://github.com/LineageOS/android_kernel_xiaomi_sm6150.git -b lineage-20 ~/kernel/sweet-lineage

• The next step is to compile the kernel. I am going to use proton clang here.

export PATH="$HOME/kernel/toolchain/clang-proton/bin/:$PATH"
export ARCH=arm64

make O=out \
    CC=clang \
    vendor/sdmsteppe-perf_defconfig \
    vendor/sweet.config

make -j$(nproc) \
    O=out \
    CC=clang \
    CROSS_COMPILE=aarch64-linux-gnu- \
    CROSS_COMPILE_ARM32=arm-linux-gnueabi- 

• I was able to successfully compile the kernel with proton-clang (and, it booted fine).
• Finally, we can create a flashable zip file with AnyKernel3 easily.

Thanks for reading.