ldiskfs/kernel_patches/patches/ext4-big-endian-check-2.6-sles11.patch

   1 Index: linux-2.6.27.21-0.1/fs/ext4/super.c
   2 ===================================================================
   3 --- linux-2.6.27.21-0.1.orig/fs/ext4/super.c
   4 +++ linux-2.6.27.21-0.1/fs/ext4/super.c
   5 @@ -74,6 +74,8 @@ static void ext4_write_super_lockfs(stru
   6
   7  struct proc_dir_entry *proc_root_ext4;
   8
   9 +static int bigendian_extents;
  10 +
  11  ext4_fsblk_t ext4_block_bitmap(struct super_block *sb,
  12                                struct ext4_group_desc *bg)
  13  {
  14 @@ -1291,7 +1293,7 @@ enum {
  15         Opt_stripe, Opt_delalloc, Opt_nodelalloc,
  16         Opt_block_validity, Opt_noblock_validity,
  17         Opt_inode_readahead_blks, Opt_journal_ioprio,
  18 -       Opt_discard, Opt_nodiscard,
  19 +       Opt_discard, Opt_nodiscard, Opt_bigendian_extents,
  20         Opt_iopen, Opt_noiopen, Opt_iopen_nopriv,
  21  };
  22
  23 @@ -1353,6 +1355,7 @@ static const match_table_t tokens = {
  24         {Opt_noauto_da_alloc, "noauto_da_alloc"},
  25         {Opt_discard, "discard"},
  26         {Opt_nodiscard, "nodiscard"},
  27 +       {Opt_bigendian_extents, "bigendian_extents"},
  28         {Opt_err, NULL},
  29  };
  30
  31 @@ -1768,6 +1771,9 @@ set_qf_format:
  32                 case Opt_nodiscard:
  33                         clear_opt(sbi->s_mount_opt, DISCARD);
  34                         break;
  35 +               case Opt_bigendian_extents:
  36 +                       bigendian_extents = 1;
  37 +                       break;
  38                 default:
  39                         ext4_msg(sb, KERN_ERR,
  40                                "Unrecognized mount option \"%s\" "
  41 @@ -2673,6 +2679,15 @@ static int ext4_fill_super(struct super_
  42                                  &sbi->s_inode_readahead_blks);
  43  #endif
  44
  45 +#ifdef __BIG_ENDIAN
  46 +       if (bigendian_extents == 0) {
  47 +               printk(KERN_ERR "EXT4-fs: extents feature is not guaranteed to "
  48 +                      "work on big-endian systems. Use \"bigendian_extents\" "
  49 +                      "mount option to override.\n");
  50 +               goto failed_mount;
  51 +       }
  52 +#endif
  53 +
  54         bgl_lock_init(sbi->s_blockgroup_lock);
  55
  56         for (i = 0; i < db_count; i++) {