ldiskfs/kernel_patches/patches/sles11sp2/ext4-big-endian-check-3.0.patch

   1 --- a/fs/ext4/super.c
   2 +++ b/fs/ext4/super.c
   3 @@ -139,6 +139,8 @@ void ext4_kvfree(void *ptr)
   4
   5  }
   6
   7 +static int bigendian_extents;
   8 +
   9  ext4_fsblk_t ext4_block_bitmap(struct super_block *sb,
  10                                struct ext4_group_desc *bg)
  11  {
  12 @@ -1354,7 +1356,7 @@ enum {
  13         Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity,
  14         Opt_inode_readahead_blks, Opt_journal_ioprio,
  15         Opt_dioread_nolock, Opt_dioread_lock,
  16 -       Opt_mballoc,
  17 +       Opt_mballoc, Opt_bigendian_extents,
  18         Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable,
  19  };
  20
  21 @@ -1429,6 +1431,7 @@ static const match_table_t tokens = {
  22         {Opt_noauto_da_alloc, "noauto_da_alloc"},
  23         {Opt_dioread_nolock, "dioread_nolock"},
  24         {Opt_dioread_lock, "dioread_lock"},
  25 +       {Opt_bigendian_extents, "bigendian_extents"},
  26         {Opt_mballoc, "mballoc"},
  27         {Opt_discard, "discard"},
  28         {Opt_nodiscard, "nodiscard"},
  29 @@ -1903,6 +1906,9 @@ set_qf_format:
  30                         else
  31                                 set_opt(sb,NO_AUTO_DA_ALLOC);
  32                         break;
  33 +               case Opt_bigendian_extents:
  34 +                       bigendian_extents = 1;
  35 +                       break;
  36                 case Opt_discard:
  37                         set_opt(sb, DISCARD);
  38                         break;
  39 @@ -3497,6 +3503,16 @@ static int ext4_fill_super(struct super_
  40                 goto failed_mount;
  41         }
  42
  43 +#ifdef __BIG_ENDIAN
  44 +       if (bigendian_extents == 0) {
  45 +               printk(KERN_ERR "EXT4-fs: extents feature is not guaranteed to "
  46 +                      "work on big-endian systems. Use \"bigendian_extents\" "
  47 +                      "mount option to override.\n");
  48 +               goto failed_mount;
  49 +       }
  50 +#endif
  51 +
  52 +
  53  #ifdef CONFIG_PROC_FS
  54         if (ext4_proc_root)
  55                 sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root);