v4.19.13 snapshot.
diff --git a/include/linux/lzo.h b/include/linux/lzo.h
new file mode 100644
index 0000000..2ae27cb
--- /dev/null
+++ b/include/linux/lzo.h
@@ -0,0 +1,46 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __LZO_H__
+#define __LZO_H__
+/*
+ * LZO Public Kernel Interface
+ * A mini subset of the LZO real-time data compression library
+ *
+ * Copyright (C) 1996-2012 Markus F.X.J. Oberhumer <markus@oberhumer.com>
+ *
+ * The full LZO package can be found at:
+ * http://www.oberhumer.com/opensource/lzo/
+ *
+ * Changed for Linux kernel use by:
+ * Nitin Gupta <nitingupta910@gmail.com>
+ * Richard Purdie <rpurdie@openedhand.com>
+ */
+
+#define LZO1X_1_MEM_COMPRESS (8192 * sizeof(unsigned short))
+#define LZO1X_MEM_COMPRESS LZO1X_1_MEM_COMPRESS
+
+#define lzo1x_worst_compress(x) ((x) + ((x) / 16) + 64 + 3)
+
+/* This requires 'wrkmem' of size LZO1X_1_MEM_COMPRESS */
+int lzo1x_1_compress(const unsigned char *src, size_t src_len,
+ unsigned char *dst, size_t *dst_len, void *wrkmem);
+
+/* safe decompression with overrun testing */
+int lzo1x_decompress_safe(const unsigned char *src, size_t src_len,
+ unsigned char *dst, size_t *dst_len);
+
+/*
+ * Return values (< 0 = Error)
+ */
+#define LZO_E_OK 0
+#define LZO_E_ERROR (-1)
+#define LZO_E_OUT_OF_MEMORY (-2)
+#define LZO_E_NOT_COMPRESSIBLE (-3)
+#define LZO_E_INPUT_OVERRUN (-4)
+#define LZO_E_OUTPUT_OVERRUN (-5)
+#define LZO_E_LOOKBEHIND_OVERRUN (-6)
+#define LZO_E_EOF_NOT_FOUND (-7)
+#define LZO_E_INPUT_NOT_CONSUMED (-8)
+#define LZO_E_NOT_YET_IMPLEMENTED (-9)
+#define LZO_E_INVALID_ARGUMENT (-10)
+
+#endif