linux-kernel - Re: [PATCH 1/5] cifsd: add server handler and tranport layers

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Date:   Mon, 22 Mar 2021 22:18:16 +0000
From:   Matthew Wilcox <willy@...radead.org>
To:     Namjae Jeon <namjae.jeon@...sung.com>
Cc:     linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-cifs@...r.kernel.org,
        linux-cifsd-devel@...ts.sourceforge.net, smfrench@...il.com,
        senozhatsky@...omium.org, hyc.lee@...il.com,
        viro@...iv.linux.org.uk, hch@....de, hch@...radead.org,
        ronniesahlberg@...il.com, aurelien.aptel@...il.com,
        aaptel@...e.com, sandeen@...deen.net, dan.carpenter@...cle.com,
        colin.king@...onical.com, rdunlap@...radead.org,
        Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
        Steve French <stfrench@...rosoft.com>
Subject: Re: [PATCH 1/5] cifsd: add server handler and tranport layers

On Mon, Mar 22, 2021 at 02:13:40PM +0900, Namjae Jeon wrote:
> +#define RESPONSE_BUF(w)		((void *)(w)->response_buf)
> +#define REQUEST_BUF(w)		((void *)(w)->request_buf)

Why do you do this obfuscation?

> +#define RESPONSE_BUF_NEXT(w)	\
> +	((void *)((w)->response_buf + (w)->next_smb2_rsp_hdr_off))
> +#define REQUEST_BUF_NEXT(w)	\
> +	((void *)((w)->request_buf + (w)->next_smb2_rcv_hdr_off))

These obfuscations aren't even used; delete them

> +#define RESPONSE_SZ(w)		((w)->response_sz)
> +
> +#define INIT_AUX_PAYLOAD(w)	((w)->aux_payload_buf = NULL)
> +#define HAS_AUX_PAYLOAD(w)	((w)->aux_payload_sz != 0)

I mean, do you really find it clearer to write:

	if (HAS_AUX_PAYLOAD(work))
than
	if (work->aux_payload_sz)

The unobfuscated version is actually shorter!