diff options
Diffstat (limited to 'target/linux/generic/patches-2.6.31/050-lzo_compressed_kernels.patch')
-rw-r--r-- | target/linux/generic/patches-2.6.31/050-lzo_compressed_kernels.patch | 309 |
1 files changed, 0 insertions, 309 deletions
diff --git a/target/linux/generic/patches-2.6.31/050-lzo_compressed_kernels.patch b/target/linux/generic/patches-2.6.31/050-lzo_compressed_kernels.patch deleted file mode 100644 index 733d1756f..000000000 --- a/target/linux/generic/patches-2.6.31/050-lzo_compressed_kernels.patch +++ /dev/null @@ -1,309 +0,0 @@ ---- /dev/null -+++ b/include/linux/decompress/unlzo.h -@@ -0,0 +1,10 @@ -+#ifndef DECOMPRESS_UNLZO_H -+#define DECOMPRESS_UNLZO_H -+ -+int unlzo(unsigned char *inbuf, int len, -+ int(*fill)(void*, unsigned int), -+ int(*flush)(void*, unsigned int), -+ unsigned char *output, -+ int *pos, -+ void(*error)(char *x)); -+#endif ---- a/init/Kconfig -+++ b/init/Kconfig -@@ -115,10 +115,13 @@ config HAVE_KERNEL_BZIP2 - config HAVE_KERNEL_LZMA - bool - -+config HAVE_KERNEL_LZO -+ bool -+ - choice - prompt "Kernel compression mode" - default KERNEL_GZIP -- depends on HAVE_KERNEL_GZIP || HAVE_KERNEL_BZIP2 || HAVE_KERNEL_LZMA -+ depends on HAVE_KERNEL_GZIP || HAVE_KERNEL_BZIP2 || HAVE_KERNEL_LZMA || HAVE_KERNEL_LZO - help - The linux kernel is a kind of self-extracting executable. - Several compression algorithms are available, which differ -@@ -141,9 +144,8 @@ config KERNEL_GZIP - bool "Gzip" - depends on HAVE_KERNEL_GZIP - help -- The old and tried gzip compression. Its compression ratio is -- the poorest among the 3 choices; however its speed (both -- compression and decompression) is the fastest. -+ The old and tried gzip compression. It provides a good balance -+ between compression ratio and decompression speed. - - config KERNEL_BZIP2 - bool "Bzip2" -@@ -164,6 +166,14 @@ config KERNEL_LZMA - two. Compression is slowest. The kernel size is about 33% - smaller with LZMA in comparison to gzip. - -+config KERNEL_LZO -+ bool "LZO" -+ depends on HAVE_KERNEL_LZO -+ help -+ Its compression ratio is the poorest among the 4. The kernel -+ size is about about 10% bigger than gzip; however its speed -+ (both compression and decompression) is the fastest. -+ - endchoice - - config SWAP ---- /dev/null -+++ b/lib/decompress_unlzo.c -@@ -0,0 +1,208 @@ -+/* -+ * LZO decompressor for the Linux kernel. Code borrowed from the lzo -+ * implementation by Markus Franz Xaver Johannes Oberhumer. -+ * -+ * Linux kernel adaptation: -+ * Copyright (C) 2009 -+ * Albin Tonnerre, Free Electrons <albin.tonnerre@free-electrons.com> -+ * -+ * Original code: -+ * Copyright (C) 1996-2005 Markus Franz Xaver Johannes Oberhumer -+ * All Rights Reserved. -+ * -+ * lzop and the LZO library are free software; you can redistribute them -+ * and/or modify them 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. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; see the file COPYING. -+ * If not, write to the Free Software Foundation, Inc., -+ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. -+ * -+ * Markus F.X.J. Oberhumer -+ * <markus@oberhumer.com> -+ * http://www.oberhumer.com/opensource/lzop/ -+ */ -+ -+#ifdef STATIC -+#include "lzo/lzo1x_decompress.c" -+#else -+#include <linux/slab.h> -+#include <linux/decompress/unlzo.h> -+#endif -+ -+#include <linux/types.h> -+#include <linux/lzo.h> -+#include <linux/decompress/mm.h> -+ -+#include <linux/compiler.h> -+#include <asm/unaligned.h> -+ -+static const unsigned char lzop_magic[] = -+ { 0x89, 0x4c, 0x5a, 0x4f, 0x00, 0x0d, 0x0a, 0x1a, 0x0a }; -+ -+#define LZO_BLOCK_SIZE (256*1024l) -+#define HEADER_HAS_FILTER 0x00000800L -+ -+STATIC inline int INIT parse_header(u8 *input, u8 *skip) -+{ -+ int l; -+ u8 *parse = input; -+ u8 level = 0; -+ u16 version; -+ -+ /* read magic: 9 first bits */ -+ for (l = 0; l < 9; l++) { -+ if (*parse++ != lzop_magic[l]) -+ return 0; -+ } -+ /* get version (2bytes), skip library version (2), -+ * 'need to be extracted' version (2) and -+ * method (1) */ -+ version = get_unaligned_be16(parse); -+ parse += 7; -+ if (version >= 0x0940) -+ level = *parse++; -+ if (get_unaligned_be32(parse) & HEADER_HAS_FILTER) -+ parse += 8; /* flags + filter info */ -+ else -+ parse += 4; /* flags */ -+ -+ /* skip mode and mtime_low */ -+ parse += 8; -+ if (version >= 0x0940) -+ parse += 4; /* skip mtime_high */ -+ -+ l = *parse++; -+ /* don't care about the file name, and skip checksum */ -+ parse += l + 4; -+ -+ *skip = parse - input; -+ return 1; -+} -+ -+STATIC inline int INIT unlzo(u8 *input, int in_len, -+ int (*fill) (void *, unsigned int), -+ int (*flush) (void *, unsigned int), -+ u8 *output, int *posp, -+ void (*error_fn) (char *x)) -+{ -+ u8 skip = 0, r = 0; -+ u32 src_len, dst_len; -+ size_t tmp; -+ u8 *in_buf, *in_buf_save, *out_buf; -+ int obytes_processed = 0; -+ -+ set_error_fn(error_fn); -+ -+ if (output) -+ out_buf = output; -+ else if (!flush) { -+ error("NULL output pointer and no flush function provided"); -+ goto exit; -+ } else { -+ out_buf = malloc(LZO_BLOCK_SIZE); -+ if (!out_buf) { -+ error("Could not allocate output buffer"); -+ goto exit; -+ } -+ } -+ -+ if (input && fill) { -+ error("Both input pointer and fill function provided, don't know what to do"); -+ goto exit_1; -+ } else if (input) -+ in_buf = input; -+ else if (!fill || !posp) { -+ error("NULL input pointer and missing position pointer or fill function"); -+ goto exit_1; -+ } else { -+ in_buf = malloc(lzo1x_worst_compress(LZO_BLOCK_SIZE)); -+ if (!in_buf) { -+ error("Could not allocate input buffer"); -+ goto exit_1; -+ } -+ } -+ in_buf_save = in_buf; -+ -+ if (posp) -+ *posp = 0; -+ -+ if (fill) -+ fill(in_buf, lzo1x_worst_compress(LZO_BLOCK_SIZE)); -+ -+ if (!parse_header(input, &skip)) { -+ error("invalid header"); -+ goto exit_2; -+ } -+ in_buf += skip; -+ -+ if (posp) -+ *posp = skip; -+ -+ for (;;) { -+ /* read uncompressed block size */ -+ dst_len = get_unaligned_be32(in_buf); -+ in_buf += 4; -+ -+ /* exit if last block */ -+ if (dst_len == 0) { -+ if (posp) -+ *posp += 4; -+ break; -+ } -+ -+ if (dst_len > LZO_BLOCK_SIZE) { -+ error("dest len longer than block size"); -+ goto exit_2; -+ } -+ -+ /* read compressed block size, and skip block checksum info */ -+ src_len = get_unaligned_be32(in_buf); -+ in_buf += 8; -+ -+ if (src_len <= 0 || src_len > dst_len) { -+ error("file corrupted"); -+ goto exit_2; -+ } -+ -+ /* decompress */ -+ tmp = dst_len; -+ r = lzo1x_decompress_safe((u8 *) in_buf, src_len, out_buf, &tmp); -+ -+ if (r != LZO_E_OK || dst_len != tmp) { -+ error("Compressed data violation"); -+ goto exit_2; -+ } -+ -+ obytes_processed += dst_len; -+ if (flush) -+ flush(out_buf, dst_len); -+ if (output) -+ out_buf += dst_len; -+ if (posp) -+ *posp += src_len + 12; -+ if (fill) { -+ in_buf = in_buf_save; -+ fill(in_buf, lzo1x_worst_compress(LZO_BLOCK_SIZE)); -+ } else -+ in_buf += src_len; -+ } -+ -+exit_2: -+ if (!input) -+ free(in_buf); -+exit_1: -+ if (!output) -+ free(out_buf); -+exit: -+ return obytes_processed; -+} -+ -+#define decompress unlzo ---- a/lib/lzo/lzo1x_decompress.c -+++ b/lib/lzo/lzo1x_decompress.c -@@ -11,11 +11,13 @@ - * Richard Purdie <rpurdie@openedhand.com> - */ - -+#ifndef STATIC - #include <linux/module.h> - #include <linux/kernel.h> --#include <linux/lzo.h> --#include <asm/byteorder.h> -+#endif -+ - #include <asm/unaligned.h> -+#include <linux/lzo.h> - #include "lzodefs.h" - - #define HAVE_IP(x, ip_end, ip) ((size_t)(ip_end - ip) < (x)) -@@ -244,9 +246,10 @@ lookbehind_overrun: - *out_len = op - out; - return LZO_E_LOOKBEHIND_OVERRUN; - } -- -+#ifndef STATIC - EXPORT_SYMBOL_GPL(lzo1x_decompress_safe); - - MODULE_LICENSE("GPL"); - MODULE_DESCRIPTION("LZO1X Decompressor"); - -+#endif ---- a/scripts/Makefile.lib -+++ b/scripts/Makefile.lib -@@ -230,3 +230,8 @@ quiet_cmd_lzma = LZMA $@ - cmd_lzma = (cat $(filter-out FORCE,$^) | \ - lzma -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \ - (rm -f $@ ; false) -+ -+quiet_cmd_lzo = LZO $@ -+cmd_lzo = (cat $(filter-out FORCE,$^) | \ -+ lzop -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \ -+ (rm -f $@ ; false) |