target/linux/generic/patches-2.6.37/520-squashfs_revert_to_2.6.35.patch

   1 --- a/fs/squashfs/decompressor.c
   2 +++ b/fs/squashfs/decompressor.c
   3 @@ -40,11 +40,9 @@ static const struct squashfs_decompresso
   4         NULL, NULL, NULL, LZMA_COMPRESSION, "lzma", 0
   5  };
   6
   7 -#ifndef CONFIG_SQUASHFS_LZO
   8  static const struct squashfs_decompressor squashfs_lzo_unsupported_comp_ops = {
   9         NULL, NULL, NULL, LZO_COMPRESSION, "lzo", 0
  10  };
  11 -#endif
  12
  13  static const struct squashfs_decompressor squashfs_unknown_comp_ops = {
  14         NULL, NULL, NULL, 0, "unknown", 0
  15 @@ -53,11 +51,7 @@ static const struct squashfs_decompresso
  16  static const struct squashfs_decompressor *decompressor[] = {
  17         &squashfs_zlib_comp_ops,
  18         &squashfs_lzma_unsupported_comp_ops,
  19 -#ifdef CONFIG_SQUASHFS_LZO
  20 -       &squashfs_lzo_comp_ops,
  21 -#else
  22         &squashfs_lzo_unsupported_comp_ops,
  23 -#endif
  24         &squashfs_unknown_comp_ops
  25  };
  26
  27 --- a/fs/squashfs/Kconfig
  28 +++ b/fs/squashfs/Kconfig
  29 @@ -5,13 +5,13 @@ config SQUASHFS
  30         help
  31           Saying Y here includes support for SquashFS 4.0 (a Compressed
  32           Read-Only File System).  Squashfs is a highly compressed read-only
  33 -         filesystem for Linux.  It uses zlib/lzo compression to compress both
  34 +         filesystem for Linux.  It uses zlib compression to compress both
  35           files, inodes and directories.  Inodes in the system are very small
  36           and all blocks are packed to minimise data overhead. Block sizes
  37           greater than 4K are supported up to a maximum of 1 Mbytes (default
  38           block size 128K).  SquashFS 4.0 supports 64 bit filesystems and files
  39           (larger than 4GB), full uid/gid information, hard links and
  40 -         timestamps.
  41 +         timestamps.
  42
  43           Squashfs is intended for general read-only filesystem use, for
  44           archival use (i.e. in cases where a .tar.gz file may be used), and in
  45 @@ -26,7 +26,7 @@ config SQUASHFS
  46
  47           If unsure, say N.
  48
  49 -config SQUASHFS_XATTR
  50 +config SQUASHFS_XATTRS
  51         bool "Squashfs XATTR support"
  52         depends on SQUASHFS
  53         default n
  54 @@ -37,24 +37,9 @@ config SQUASHFS_XATTR
  55
  56           If unsure, say N.
  57
  58 -config SQUASHFS_LZO
  59 -       bool "Include support for LZO compressed file systems"
  60 -       depends on SQUASHFS
  61 -       default n
  62 -       select LZO_DECOMPRESS
  63 -       help
  64 -         Saying Y here includes support for reading Squashfs file systems
  65 -         compressed with LZO compresssion.  LZO compression is mainly
  66 -         aimed at embedded systems with slower CPUs where the overheads
  67 -         of zlib are too high.
  68 -
  69 -         LZO is not the standard compression used in Squashfs and so most
  70 -         file systems will be readable without selecting this option.
  71 -
  72 -         If unsure, say N.
  73 -
  74  config SQUASHFS_EMBEDDED
  75 -       bool "Additional option for memory-constrained systems"
  76 +
  77 +       bool "Additional option for memory-constrained systems"
  78         depends on SQUASHFS
  79         default n
  80         help
  81 --- a/fs/squashfs/lzo_wrapper.c
  82 +++ /dev/null
  83 @@ -1,136 +0,0 @@
  84 -/*
  85 - * Squashfs - a compressed read only filesystem for Linux
  86 - *
  87 - * Copyright (c) 2010 LG Electronics
  88 - * Chan Jeong <chan.jeong@lge.com>
  89 - *
  90 - * This program is free software; you can redistribute it and/or
  91 - * modify it under the terms of the GNU General Public License
  92 - * as published by the Free Software Foundation; either version 2,
  93 - * or (at your option) any later version.
  94 - *
  95 - * This program is distributed in the hope that it will be useful,
  96 - * but WITHOUT ANY WARRANTY; without even the implied warranty of
  97 - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  98 - * GNU General Public License for more details.
  99 - *
 100 - * You should have received a copy of the GNU General Public License
 101 - * along with this program; if not, write to the Free Software
 102 - * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 103 - *
 104 - * lzo_wrapper.c
 105 - */
 106 -
 107 -#include <linux/mutex.h>
 108 -#include <linux/buffer_head.h>
 109 -#include <linux/slab.h>
 110 -#include <linux/vmalloc.h>
 111 -#include <linux/lzo.h>
 112 -
 113 -#include "squashfs_fs.h"
 114 -#include "squashfs_fs_sb.h"
 115 -#include "squashfs_fs_i.h"
 116 -#include "squashfs.h"
 117 -#include "decompressor.h"
 118 -
 119 -struct squashfs_lzo {
 120 -       void    *input;
 121 -       void    *output;
 122 -};
 123 -
 124 -static void *lzo_init(struct squashfs_sb_info *msblk)
 125 -{
 126 -       int block_size = max_t(int, msblk->block_size, SQUASHFS_METADATA_SIZE);
 127 -
 128 -       struct squashfs_lzo *stream = kzalloc(sizeof(*stream), GFP_KERNEL);
 129 -       if (stream == NULL)
 130 -               goto failed;
 131 -       stream->input = vmalloc(block_size);
 132 -       if (stream->input == NULL)
 133 -               goto failed;
 134 -       stream->output = vmalloc(block_size);
 135 -       if (stream->output == NULL)
 136 -               goto failed2;
 137 -
 138 -       return stream;
 139 -
 140 -failed2:
 141 -       vfree(stream->input);
 142 -failed:
 143 -       ERROR("Failed to allocate lzo workspace\n");
 144 -       kfree(stream);
 145 -       return NULL;
 146 -}
 147 -
 148 -
 149 -static void lzo_free(void *strm)
 150 -{
 151 -       struct squashfs_lzo *stream = strm;
 152 -
 153 -       if (stream) {
 154 -               vfree(stream->input);
 155 -               vfree(stream->output);
 156 -       }
 157 -       kfree(stream);
 158 -}
 159 -
 160 -
 161 -static int lzo_uncompress(struct squashfs_sb_info *msblk, void **buffer,
 162 -       struct buffer_head **bh, int b, int offset, int length, int srclength,
 163 -       int pages)
 164 -{
 165 -       struct squashfs_lzo *stream = msblk->stream;
 166 -       void *buff = stream->input;
 167 -       int avail, i, bytes = length, res;
 168 -       size_t out_len = srclength;
 169 -
 170 -       mutex_lock(&msblk->read_data_mutex);
 171 -
 172 -       for (i = 0; i < b; i++) {
 173 -               wait_on_buffer(bh[i]);
 174 -               if (!buffer_uptodate(bh[i]))
 175 -                       goto block_release;
 176 -
 177 -               avail = min(bytes, msblk->devblksize - offset);
 178 -               memcpy(buff, bh[i]->b_data + offset, avail);
 179 -               buff += avail;
 180 -               bytes -= avail;
 181 -               offset = 0;
 182 -               put_bh(bh[i]);
 183 -       }
 184 -
 185 -       res = lzo1x_decompress_safe(stream->input, (size_t)length,
 186 -                                       stream->output, &out_len);
 187 -       if (res != LZO_E_OK)
 188 -               goto failed;
 189 -
 190 -       res = bytes = (int)out_len;
 191 -       for (i = 0, buff = stream->output; bytes && i < pages; i++) {
 192 -               avail = min_t(int, bytes, PAGE_CACHE_SIZE);
 193 -               memcpy(buffer[i], buff, avail);
 194 -               buff += avail;
 195 -               bytes -= avail;
 196 -       }
 197 -
 198 -       mutex_unlock(&msblk->read_data_mutex);
 199 -       return res;
 200 -
 201 -block_release:
 202 -       for (; i < b; i++)
 203 -               put_bh(bh[i]);
 204 -
 205 -failed:
 206 -       mutex_unlock(&msblk->read_data_mutex);
 207 -
 208 -       ERROR("lzo decompression failed, data probably corrupt\n");
 209 -       return -EIO;
 210 -}
 211 -
 212 -const struct squashfs_decompressor squashfs_lzo_comp_ops = {
 213 -       .init = lzo_init,
 214 -       .free = lzo_free,
 215 -       .decompress = lzo_uncompress,
 216 -       .id = LZO_COMPRESSION,
 217 -       .name = "lzo",
 218 -       .supported = 1
 219 -};
 220 --- a/fs/squashfs/Makefile
 221 +++ b/fs/squashfs/Makefile
 222 @@ -5,5 +5,5 @@
 223  obj-$(CONFIG_SQUASHFS) += squashfs.o
 224  squashfs-y += block.o cache.o dir.o export.o file.o fragment.o id.o inode.o
 225  squashfs-y += namei.o super.o symlink.o zlib_wrapper.o decompressor.o
 226 -squashfs-$(CONFIG_SQUASHFS_XATTR) += xattr.o xattr_id.o
 227 -squashfs-$(CONFIG_SQUASHFS_LZO) += lzo_wrapper.o
 228 +squashfs-$(CONFIG_SQUASHFS_XATTRS) += xattr.o xattr_id.o
 229 +
 230 --- a/fs/squashfs/squashfs.h
 231 +++ b/fs/squashfs/squashfs.h
 232 @@ -104,6 +104,3 @@ extern const struct xattr_handler *squas
 233
 234  /* zlib_wrapper.c */
 235  extern const struct squashfs_decompressor squashfs_zlib_comp_ops;
 236 -
 237 -/* lzo_wrapper.c */
 238 -extern const struct squashfs_decompressor squashfs_lzo_comp_ops;
 239 --- a/fs/squashfs/xattr.h
 240 +++ b/fs/squashfs/xattr.h
 241 @@ -21,7 +21,7 @@
 242   * xattr.h
 243   */
 244
 245 -#ifdef CONFIG_SQUASHFS_XATTR
 246 +#ifdef CONFIG_SQUASHFS_XATTRS
 247  extern __le64 *squashfs_read_xattr_id_table(struct super_block *, u64,
 248                 u64 *, int *);
 249  extern int squashfs_xattr_lookup(struct super_block *, unsigned int, int *,