ret = posix_fadvise(outfd, orig_offset - stream->max_sb_size,
stream->max_sb_size, POSIX_FADV_DONTNEED);
if (ret && ret != -ENOSYS) {
ret = posix_fadvise(outfd, orig_offset - stream->max_sb_size,
stream->max_sb_size, POSIX_FADV_DONTNEED);
if (ret && ret != -ENOSYS) {