new file mode 100644
--- /dev/null
+++ b/packages/fs/jffs2/current/src/compr_zlib.c
@@ -0,0 +1,169 @@
+/*
+ * JFFS2 -- Journalling Flash File System, Version 2.
+ *
+ * Copyright (C) 2001, 2002 Red Hat, Inc.
+ *
+ * Created by David Woodhouse <dwmw2@cambridge.redhat.com>
+ *
+ * For licensing information, see the file 'LICENCE' in this directory.
+ *
+ * $Id: compr_zlib.c,v 1.12 2002/01/25 01:49:26 dwmw2 Exp $
+ *
+ */
+
+/* Be careful - there are three environments are supported by this file. 
+ * - Linux kernel.
+ * - eCos kernel.
+ * - Userspace (mkfs.jffs2).
+ */
+
+#ifdef __ECOS
+	/* Compiling in eCos (or RedBoot) */
+#include <cyg/compress/zlib.h>
+#include "jffs2port.h"
+#include "nodelist.h"
+
+#elif defined(__KERNEL__)
+	/* Compiling in Linux kernel */
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/mtd/compatmac.h> /* for min() */
+#include <linux/slab.h>
+#include <linux/jffs2.h>
+#include "nodelist.h"
+
+static void *zalloc(void *opaque, unsigned nr, unsigned size)
+{
+	/* How much does it request? Should we use vmalloc? Or be dynamic? */
+	return kmalloc(nr * size, GFP_KERNEL);
+}
+
+static void zfree(void *opaque, void *addr)
+{
+	kfree(addr);
+}
+#ifdef CONFIG_ZLIB /* 2.5 kernels will have a shared zlib, at last. */
+#include <linux/zlib.h>
+#else
+#include "zlib.h"
+#endif
+
+#else
+	/* Compiling in Linux(ish) userspace */
+#define min(x,y) ((x)<(y)?(x):(y))
+#ifndef D1
+#define D1(x)
+#endif
+#define KERN_DEBUG
+#define KERN_NOTICE
+#define KERN_WARNING
+#define printk printf
+#include <stdint.h>
+#include <stdio.h>
+#include <zlib.h>
+#endif
+
+	/* Plan: call deflate() with avail_in == *sourcelen, 
+		avail_out = *dstlen - 12 and flush == Z_FINISH. 
+		If it doesn't manage to finish,	call it again with
+		avail_in == 0 and avail_out set to the remaining 12
+		bytes for it to clean up. 
+	   Q: Is 12 bytes sufficient?
+	*/
+#define STREAM_END_SPACE 12
+
+int jffs2_zlib_compress(unsigned char *data_in, unsigned char *cpage_out, 
+		   uint32_t *sourcelen, uint32_t *dstlen)
+{
+	z_stream strm;
+	int ret;
+
+	if (*dstlen <= STREAM_END_SPACE)
+		return -1;
+
+#ifdef __KERNEL__ /* Linux needs own alloc/free funcs */
+	strm.zalloc = zalloc;
+	strm.zfree = zfree;
+#else /* eCos and userspace don't */
+	strm.zalloc = (void *)0;
+	strm.zfree = (void *)0;
+#endif
+
+	if (Z_OK != deflateInit(&strm, 3)) {
+		printk(KERN_WARNING "deflateInit failed\n");
+		return -1;
+	}
+	strm.next_in = data_in;
+	strm.total_in = 0;
+	
+	strm.next_out = cpage_out;
+	strm.total_out = 0;
+
+	while (strm.total_out < *dstlen - STREAM_END_SPACE && strm.total_in < *sourcelen) {
+		strm.avail_out = *dstlen - (strm.total_out + STREAM_END_SPACE);
+		strm.avail_in = min((unsigned)(*sourcelen-strm.total_in), strm.avail_out);
+		D1(printk(KERN_DEBUG "calling deflate with avail_in %d, avail_out %d\n",
+			  strm.avail_in, strm.avail_out));
+		ret = deflate(&strm, Z_PARTIAL_FLUSH);
+		D1(printk(KERN_DEBUG "deflate returned with avail_in %d, avail_out %d, total_in %ld, total_out %ld\n", 
+			  strm.avail_in, strm.avail_out, strm.total_in, strm.total_out));
+		if (ret != Z_OK) {
+			D1(printk(KERN_DEBUG "deflate in loop returned %d\n", ret));
+			deflateEnd(&strm);
+			return -1;
+		}
+	}
+	strm.avail_out += STREAM_END_SPACE;
+	strm.avail_in = 0;
+	ret = deflate(&strm, Z_FINISH);
+	if (ret != Z_STREAM_END) {
+		D1(printk(KERN_DEBUG "final deflate returned %d\n", ret));
+		deflateEnd(&strm);
+		return -1;
+	}
+	deflateEnd(&strm);
+
+	D1(printk(KERN_DEBUG "zlib compressed %ld bytes into %ld\n", strm.total_in, strm.total_out));
+
+	if (strm.total_out >= strm.total_in)
+		return -1;
+
+
+	*dstlen = strm.total_out;
+	*sourcelen = strm.total_in;
+	return 0;
+}
+
+void jffs2_zlib_decompress(unsigned char *data_in, unsigned char *cpage_out,
+		      uint32_t srclen, uint32_t destlen)
+{
+	z_stream strm;
+	int ret;
+
+#ifdef __KERNEL__
+	strm.zalloc = zalloc;
+	strm.zfree = zfree;
+#else
+	strm.zalloc = (void *)0;
+	strm.zfree = (void *)0;
+#endif
+
+	if (Z_OK != inflateInit(&strm)) {
+		printk(KERN_WARNING "inflateInit failed\n");
+		return;
+	}
+	strm.next_in = data_in;
+	strm.avail_in = srclen;
+	strm.total_in = 0;
+	
+	strm.next_out = cpage_out;
+	strm.avail_out = destlen;
+	strm.total_out = 0;
+
+	while((ret = inflate(&strm, Z_FINISH)) == Z_OK)
+		;
+	if (ret != Z_STREAM_END) {
+		printk(KERN_NOTICE "inflate returned %d\n", ret);
+	}
+	inflateEnd(&strm);
+}