fs/squashfs: add lz4 compression support

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

fs/squashfs/Config.in

@@ -15,6 +15,9 @@ choice
 config BR2_TARGET_ROOTFS_SQUASHFS4_GZIP
 	bool "gzip"
 
+config BR2_TARGET_ROOTFS_SQUASHFS4_LZ4
+	bool "lz4"
+
 config BR2_TARGET_ROOTFS_SQUASHFS4_LZMA
 	bool "lzma"
 

fs/squashfs/squashfs.mk

@@ -6,6 +6,9 @@
 
 ROOTFS_SQUASHFS_DEPENDENCIES = host-squashfs
 
+ifeq ($(BR2_TARGET_ROOTFS_SQUASHFS4_LZ4),y)
+ROOTFS_SQUASHFS_ARGS += -comp lz4
+else
 ifeq ($(BR2_TARGET_ROOTFS_SQUASHFS4_LZO),y)
 ROOTFS_SQUASHFS_ARGS += -comp lzo
 else
@@ -19,6 +22,7 @@ ROOTFS_SQUASHFS_ARGS += -comp gzip
 endif
 endif
 endif
+endif
 
 define ROOTFS_SQUASHFS_CMD
 	$(HOST_DIR)/usr/bin/mksquashfs $(TARGET_DIR) $@ -noappend \