target/linux/generic-2.6/patches-2.6.28/514-yaffs_2.6.28_fixes.patch

   1 --- a/fs/yaffs2/yaffs_fs.c
   2 +++ b/fs/yaffs2/yaffs_fs.c
   3 @@ -207,10 +207,20 @@ static int yaffs_writepage(struct page *
   4  #else
   5  static int yaffs_writepage(struct page *page);
   6  #endif
   7 +
   8 +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,28))
   9 +static int yaffs_write_begin(struct file *f, struct address_space *mapping,
  10 +                            loff_t pos, unsigned len, unsigned flags,
  11 +                            struct page **pagep, void **fsdata);
  12 +static int yaffs_write_end(struct file *f, struct address_space *mapping,
  13 +                          loff_t pos, unsigned len, unsigned copied,
  14 +                          struct page *pg, void *fsdata);
  15 +#else
  16  static int yaffs_prepare_write(struct file *f, struct page *pg,
  17                                unsigned offset, unsigned to);
  18  static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset,
  19                               unsigned to);
  20 +#endif
  21
  22  static int yaffs_readlink(struct dentry *dentry, char __user * buffer,
  23                           int buflen);
  24 @@ -223,8 +233,13 @@ static int yaffs_follow_link(struct dent
  25  static struct address_space_operations yaffs_file_address_operations = {
  26         .readpage = yaffs_readpage,
  27         .writepage = yaffs_writepage,
  28 +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,28))
  29 +       .write_begin = yaffs_write_begin,
  30 +       .write_end = yaffs_write_end,
  31 +#else
  32         .prepare_write = yaffs_prepare_write,
  33         .commit_write = yaffs_commit_write,
  34 +#endif
  35  };
  36
  37  #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,22))
  38 @@ -687,6 +702,74 @@ static int yaffs_writepage(struct page *
  39         return (nWritten == nBytes) ? 0 : -ENOSPC;
  40  }
  41
  42 +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,28))
  43 +static int yaffs_write_begin(struct file *f, struct address_space *mapping,
  44 +                            loff_t pos, unsigned len, unsigned flags,
  45 +                            struct page **pagep, void **fsdata)
  46 +{
  47 +       struct page *pg;
  48 +       pgoff_t index = pos >> PAGE_CACHE_SHIFT;
  49 +       int ret = 0;
  50 +
  51 +       pg = __grab_cache_page(mapping, index);
  52 +       if (!pg)
  53 +               return -ENOMEM;
  54 +
  55 +       *pagep = pg;
  56 +
  57 +       T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_write_begin\n"));
  58 +       if (!Page_Uptodate(pg)) {
  59 +               ret = yaffs_readpage_nolock(f, pg);
  60 +               if (ret)
  61 +                       goto err_unlock;
  62 +       }
  63 +
  64 +       T(YAFFS_TRACE_OS, (KERN_DEBUG "yaffs_write_begin\n"));
  65 +       return 0;
  66 +
  67 + err_unlock:
  68 +       unlock_page(pg);
  69 +       page_cache_release(pg);
  70 +       return ret;
  71 +}
  72 +
  73 +static int yaffs_write_end(struct file *f, struct address_space *mapping,
  74 +                          loff_t pos, unsigned len, unsigned copied,
  75 +                          struct page *pg, void *fsdata)
  76 +{
  77 +       void *addr = page_address(pg) + (pos & (PAGE_CACHE_SIZE - 1));
  78 +       loff_t pos2;
  79 +       int nBytes = copied;
  80 +       int nWritten;
  81 +
  82 +       T(YAFFS_TRACE_OS,
  83 +        (KERN_DEBUG "yaffs_write_end addr %x pos %x nBytes %d\n", (unsigned)addr,
  84 +        (unsigned)pos, nBytes));
  85 +
  86 +       pos2 = pos;
  87 +       nWritten = yaffs_file_write(f, addr, nBytes, &pos2);
  88 +
  89 +       if (nWritten != nBytes) {
  90 +               T(YAFFS_TRACE_OS,
  91 +                (KERN_DEBUG
  92 +                "yaffs_write_end not same size nWritten %d  nBytes %d\n",
  93 +                 nWritten, nBytes));
  94 +               SetPageError(pg);
  95 +               ClearPageUptodate(pg);
  96 +       } else {
  97 +               SetPageUptodate(pg);
  98 +       }
  99 +
 100 +       T(YAFFS_TRACE_OS,
 101 +        (KERN_DEBUG "yaffs_write_end returning %d\n",
 102 +        nWritten == nBytes ? nWritten : 0));
 103 +
 104 +       unlock_page(pg);
 105 +       page_cache_release(pg);
 106 +
 107 +       return (nWritten == nBytes) ? nWritten : 0;
 108 +}
 109 +#else
 110  static int yaffs_prepare_write(struct file *f, struct page *pg,
 111                                unsigned offset, unsigned to)
 112  {
 113 @@ -735,6 +818,7 @@ static int yaffs_commit_write(struct fil
 114         return nWritten == nBytes ? 0 : nWritten;
 115
 116  }
 117 +#endif /* (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,28)) */
 118
 119  static void yaffs_FillInodeFromObject(struct inode *inode, yaffs_Object * obj)
 120  {