fs: Allow a NULL pos pointer to __kernel_write (4c207ef4) · Commits · 戴 / test

Linus prefers that callers be allowed to pass in a NULL pointer for ppos like new_sync_write(). Reviewed-by:

fs/read_write.c

+3 −2

Original line number	Diff line number	Diff line
		@@ -544,10 +544,11 @@ ssize_t __kernel_write(struct file file, const void buf, size_t count, loff_t
		return warn_unsupported(file, "write");

		init_sync_kiocb(&kiocb, file);
		kiocb.ki_pos = *pos;
		kiocb.ki_pos = pos ? *pos : 0;
		iov_iter_kvec(&iter, WRITE, &iov, 1, iov.iov_len);
		ret = file->f_op->write_iter(&kiocb, &iter);
		if (ret > 0) {
		if (pos)
		*pos = kiocb.ki_pos;
		fsnotify_modify(file);
		add_wchar(current, ret);