linux/fs/jffs2/compr_lzo.c

/*
 * JFFS2 -- Journalling Flash File System, Version 2.
 *
 * Copyright © 2007 Nokia Corporation. All rights reserved.
 * Copyright © 2004-2010 David Woodhouse <[email protected]>
 *
 * Created by Richard Purdie <[email protected]>
 *
 * For licensing information, see the file 'LICENCE' in this directory.
 *
 */

#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/vmalloc.h>
#include <linux/init.h>
#include <linux/lzo.h>
#include "compr.h"

static void *lzo_mem;
static void *lzo_compress_buf;
static DEFINE_MUTEX(deflate_mutex);	/* for lzo_mem and lzo_compress_buf */

static void free_workspace(void)
{ … }

static int __init alloc_workspace(void)
{ … }

static int jffs2_lzo_compress(unsigned char *data_in, unsigned char *cpage_out,
			      uint32_t *sourcelen, uint32_t *dstlen)
{ … }

static int jffs2_lzo_decompress(unsigned char *data_in, unsigned char *cpage_out,
				 uint32_t srclen, uint32_t destlen)
{ … }

static struct jffs2_compressor jffs2_lzo_comp = …;

int __init jffs2_lzo_init(void)
{ … }

void jffs2_lzo_exit(void)
{ … }