add Lunatik submodule

Author: VictorNogueiraRio

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "lib/lunatik"]
+	path = lib/lunatik
+	url = https://github.com/luainkernel/lunatik.git

init/Kconfig

@@ -1147,6 +1147,12 @@ config HAVE_PCSPKR_PLATFORM
 config BPF
 	bool
 
+config LUNATIK
+	bool "Lunatik"
+	default n
+	help
+	  Support for the Lua interpreter
+
 menuconfig EXPERT
 	bool "Configure standard kernel features (expert users)"
 	# Unhide debug options, to make the on-by-default options visible

lib/Makefile

@@ -270,3 +270,7 @@ obj-$(CONFIG_GENERIC_LIB_LSHRDI3) += lshrdi3.o
 obj-$(CONFIG_GENERIC_LIB_MULDI3) += muldi3.o
 obj-$(CONFIG_GENERIC_LIB_CMPDI2) += cmpdi2.o
 obj-$(CONFIG_GENERIC_LIB_UCMPDI2) += ucmpdi2.o
+
+subdir-ccflags-y += -I$(srctree)/lib/lunatik/lua \
+	            -D_KERNEL
+obj-$(CONFIG_LUNATIK) += lunatik/

lib/lunatik

@@ -8,6 +8,8 @@ obj-y := sock.o request_sock.o skbuff.o datagram.o stream.o scm.o \
 
 obj-$(CONFIG_SYSCTL) += sysctl_net_core.o
 
+CFLAGS_dev.o = -Ilib/lunatik/lua/ -D_KERNEL
+CFLAGS_filter.o = -Ilib/lunatik/lua/ -D_KERNEL
 obj-y		     += dev.o ethtool.o dev_addr_lists.o dst.o netevent.o \
 			neighbour.o rtnetlink.o utils.o link_watch.o filter.o \
 			sock_diag.o dev_ioctl.o tso.o sock_reuseport.o \