[PATCH v2 6/8] zram: delete custom lzo/lz4
From: Sergey Senozhatsky
Date: Tue May 31 2016 - 08:21:42 EST
Remove lzo/lz4 backends, we use crypto API now.
Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@xxxxxxxxx>
Cc: Minchan Kim <minchan@xxxxxxxxxx>
Cc: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>
---
drivers/block/zram/Kconfig | 9 -------
drivers/block/zram/Makefile | 4 +--
drivers/block/zram/zcomp.c | 2 --
drivers/block/zram/zcomp.h | 15 -----------
drivers/block/zram/zcomp_lz4.c | 56 ------------------------------------------
drivers/block/zram/zcomp_lz4.h | 17 -------------
drivers/block/zram/zcomp_lzo.c | 56 ------------------------------------------
drivers/block/zram/zcomp_lzo.h | 17 -------------
8 files changed, 1 insertion(+), 175 deletions(-)
delete mode 100644 drivers/block/zram/zcomp_lz4.c
delete mode 100644 drivers/block/zram/zcomp_lz4.h
delete mode 100644 drivers/block/zram/zcomp_lzo.c
delete mode 100644 drivers/block/zram/zcomp_lzo.h
diff --git a/drivers/block/zram/Kconfig b/drivers/block/zram/Kconfig
index 2252cd7..b8ecba6 100644
--- a/drivers/block/zram/Kconfig
+++ b/drivers/block/zram/Kconfig
@@ -13,12 +13,3 @@ config ZRAM
disks and maybe many more.
See zram.txt for more information.
-
-config ZRAM_LZ4_COMPRESS
- bool "Enable LZ4 algorithm support"
- depends on ZRAM
- select CRYPTO_LZ4
- default n
- help
- This option enables LZ4 compression algorithm support. Compression
- algorithm can be changed using `comp_algorithm' device attribute.
diff --git a/drivers/block/zram/Makefile b/drivers/block/zram/Makefile
index be0763f..9e2b79e 100644
--- a/drivers/block/zram/Makefile
+++ b/drivers/block/zram/Makefile
@@ -1,5 +1,3 @@
-zram-y := zcomp_lzo.o zcomp.o zram_drv.o
-
-zram-$(CONFIG_ZRAM_LZ4_COMPRESS) += zcomp_lz4.o
+zram-y := zcomp.o zram_drv.o
obj-$(CONFIG_ZRAM) += zram.o
diff --git a/drivers/block/zram/zcomp.c b/drivers/block/zram/zcomp.c
index 2381ca9..0c8606b 100644
--- a/drivers/block/zram/zcomp.c
+++ b/drivers/block/zram/zcomp.c
@@ -20,9 +20,7 @@
static const char * const backends[] = {
"lzo",
-#ifdef CONFIG_ZRAM_LZ4_COMPRESS
"lz4",
-#endif
NULL
};
diff --git a/drivers/block/zram/zcomp.h b/drivers/block/zram/zcomp.h
index c914ab7..478cac2 100644
--- a/drivers/block/zram/zcomp.h
+++ b/drivers/block/zram/zcomp.h
@@ -16,24 +16,9 @@ struct zcomp_strm {
struct crypto_comp *tfm;
};
-/* static compression backend */
-struct zcomp_backend {
- int (*compress)(const unsigned char *src, unsigned char *dst,
- size_t *dst_len, void *private);
-
- int (*decompress)(const unsigned char *src, size_t src_len,
- unsigned char *dst);
-
- void *(*create)(gfp_t flags);
- void (*destroy)(void *private);
-
- const char *name;
-};
-
/* dynamic per-device compression frontend */
struct zcomp {
struct zcomp_strm * __percpu *stream;
- struct zcomp_backend *backend;
struct notifier_block notifier;
const char *name;
diff --git a/drivers/block/zram/zcomp_lz4.c b/drivers/block/zram/zcomp_lz4.c
deleted file mode 100644
index 0110086..0000000
--- 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",
-};
diff --git a/drivers/block/zram/zcomp_lz4.h b/drivers/block/zram/zcomp_lz4.h
deleted file mode 100644
index 60613fb..0000000
--- a/drivers/block/zram/zcomp_lz4.h
+++ /dev/null
@@ -1,17 +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.
- */
-
-#ifndef _ZCOMP_LZ4_H_
-#define _ZCOMP_LZ4_H_
-
-#include "zcomp.h"
-
-extern struct zcomp_backend zcomp_lz4;
-
-#endif /* _ZCOMP_LZ4_H_ */
diff --git a/drivers/block/zram/zcomp_lzo.c b/drivers/block/zram/zcomp_lzo.c
deleted file mode 100644
index ed7a1f0..0000000
--- a/drivers/block/zram/zcomp_lzo.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/lzo.h>
-#include <linux/vmalloc.h>
-#include <linux/mm.h>
-
-#include "zcomp_lzo.h"
-
-static void *lzo_create(gfp_t flags)
-{
- void *ret;
-
- ret = kmalloc(LZO1X_MEM_COMPRESS, flags);
- if (!ret)
- ret = __vmalloc(LZO1X_MEM_COMPRESS,
- flags | __GFP_HIGHMEM,
- PAGE_KERNEL);
- return ret;
-}
-
-static void lzo_destroy(void *private)
-{
- kvfree(private);
-}
-
-static int lzo_compress(const unsigned char *src, unsigned char *dst,
- size_t *dst_len, void *private)
-{
- int ret = lzo1x_1_compress(src, PAGE_SIZE, dst, dst_len, private);
- return ret == LZO_E_OK ? 0 : ret;
-}
-
-static int lzo_decompress(const unsigned char *src, size_t src_len,
- unsigned char *dst)
-{
- size_t dst_len = PAGE_SIZE;
- int ret = lzo1x_decompress_safe(src, src_len, dst, &dst_len);
- return ret == LZO_E_OK ? 0 : ret;
-}
-
-struct zcomp_backend zcomp_lzo = {
- .compress = lzo_compress,
- .decompress = lzo_decompress,
- .create = lzo_create,
- .destroy = lzo_destroy,
- .name = "lzo",
-};
diff --git a/drivers/block/zram/zcomp_lzo.h b/drivers/block/zram/zcomp_lzo.h
deleted file mode 100644
index 128c580..0000000
--- a/drivers/block/zram/zcomp_lzo.h
+++ /dev/null
@@ -1,17 +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.
- */
-
-#ifndef _ZCOMP_LZO_H_
-#define _ZCOMP_LZO_H_
-
-#include "zcomp.h"
-
-extern struct zcomp_backend zcomp_lzo;
-
-#endif /* _ZCOMP_LZO_H_ */
--
2.8.3.394.g3916adf