First enable the CONFIG_LLFREE
option (make O=build-llfree-vm LLVM=1 menuconfig
).
Currently only x86_64 has been tested.
Then the Kernel can be build as usual (with llvm):
make O=build-llfree-vm LLVM=1
The llfree module can be found in mm/llfree. It consists of the llfree-c library and a small wrapper.