fiemap_prep
ret = fiemap_prep(inode, fieinfo, start, &len, 0);
error = fiemap_prep(inode, fieinfo, start, &len, 0);
ret = fiemap_prep(inode, fieinfo, start, &len, FIEMAP_FLAG_XATTR);
EXPORT_SYMBOL(fiemap_prep);
ret = fiemap_prep(inode, fi, start, &iter.len, 0);
ret = fiemap_prep(inode, fieinfo, start, &len, 0);
ret = fiemap_prep(inode, fieinfo, map_start, &map_len, 0);
rc = fiemap_prep(d_inode(cfile->dentry), fei, start, &len, 0);
int fiemap_prep(struct inode *inode, struct fiemap_extent_info *fieinfo,