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path: root/drivers/block/zram/zcomp_lz4.c
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Diffstat (limited to 'drivers/block/zram/zcomp_lz4.c')
-rw-r--r--drivers/block/zram/zcomp_lz4.c56
1 files changed, 0 insertions, 56 deletions
diff --git a/drivers/block/zram/zcomp_lz4.c b/drivers/block/zram/zcomp_lz4.c
deleted file mode 100644
index 0110086accba..000000000000
--- a/drivers/block/zram/zcomp_lz4.c
+++ /dev/null
@@ -1,56 +0,0 @@
-/*
- * Copyright (C) 2014 Sergey Senozhatsky.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
-
-#include <linux/kernel.h>
-#include <linux/slab.h>
-#include <linux/lz4.h>
-#include <linux/vmalloc.h>
-#include <linux/mm.h>
-
-#include "zcomp_lz4.h"
-
-static void *zcomp_lz4_create(gfp_t flags)
-{
- void *ret;
-
- ret = kmalloc(LZ4_MEM_COMPRESS, flags);
- if (!ret)
- ret = __vmalloc(LZ4_MEM_COMPRESS,
- flags | __GFP_HIGHMEM,
- PAGE_KERNEL);
- return ret;
-}
-
-static void zcomp_lz4_destroy(void *private)
-{
- kvfree(private);
-}
-
-static int zcomp_lz4_compress(const unsigned char *src, unsigned char *dst,
- size_t *dst_len, void *private)
-{
- /* return : Success if return 0 */
- return lz4_compress(src, PAGE_SIZE, dst, dst_len, private);
-}
-
-static int zcomp_lz4_decompress(const unsigned char *src, size_t src_len,
- unsigned char *dst)
-{
- size_t dst_len = PAGE_SIZE;
- /* return : Success if return 0 */
- return lz4_decompress_unknownoutputsize(src, src_len, dst, &dst_len);
-}
-
-struct zcomp_backend zcomp_lz4 = {
- .compress = zcomp_lz4_compress,
- .decompress = zcomp_lz4_decompress,
- .create = zcomp_lz4_create,
- .destroy = zcomp_lz4_destroy,
- .name = "lz4",
-};