- struct file * file;
- struct address_space *mapping;
- int ret, err;
-
- ret = -EBADF;
- file = fget(fd);
- if (!file)
- goto out;
-
- ret = -EINVAL;
- if (!file->f_op || !file->f_op->fsync)
- goto out_putf;
-
- mapping = file->f_mapping;
-
- current->flags |= PF_SYNCWRITE;
- ret = filemap_fdatawrite(mapping);
- down(&mapping->host->i_sem);
- err = file->f_op->fsync(file, file->f_dentry, 1);
- if (!ret)
- ret = err;
- up(&mapping->host->i_sem);
- err = filemap_fdatawait(mapping);
- if (!ret)
- ret = err;
- current->flags &= ~PF_SYNCWRITE;