linux-kernel - Re: [PATCH 1/4] drivers: hv: dxgkrnl: core code

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Message-ID: <20200814131839.u2vy52mtiejtuwcg@liuwe-devbox-debian-v2>
Date:   Fri, 14 Aug 2020 13:18:39 +0000
From:   Wei Liu <wei.liu@...nel.org>
To:     Sasha Levin <sashal@...nel.org>
Cc:     kys@...rosoft.com, haiyangz@...rosoft.com, sthemmin@...rosoft.com,
        wei.liu@...nel.org, gregkh@...uxfoundation.org,
        iourit@...rosoft.com, linux-kernel@...r.kernel.org,
        linux-hyperv@...r.kernel.org
Subject: Re: [PATCH 1/4] drivers: hv: dxgkrnl: core code

On Fri, Aug 14, 2020 at 08:38:53AM -0400, Sasha Levin wrote:
[...]
> +
> +#include "dxgkrnl.h"
> +
> +int dxgadapter_init(struct dxgadapter *adapter, struct hv_device *hdev)
> +{
> +	int ret = 0;
> +	char s[80];
> +
> +	UNUSED(s);

If s is not used, why not just remove it?

Indeed it is not used anywhere in this function. That saves you 80 bytes
on stack.

> +static int dxgk_destroy_hwcontext(struct dxgprocess *process,
> +					      void *__user inargs)
> +{
> +	/* This is obsolete entry point */
> +	return ENOTTY;
> +}
> +

Other places have been using negative numbers for errors. I guess you
want -ENOTTY here too.

Wei.