linux-kernel - Re: [PATCH 4/6] input/vmmouse: Use vmware

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Date:   Sat, 25 Nov 2023 01:22:58 +0000
From:   Alexey Makhalov <amakhalov@...are.com>
To:     Simon Horman <horms@...nel.org>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "virtualization@...ts.linux.dev" <virtualization@...ts.linux.dev>,
        "H . Peter Anvin" <hpa@...or.com>,
        "x86@...nel.org" <x86@...nel.org>,
        "dave.hansen@...ux.intel.co" <dave.hansen@...ux.intel.co>,
        "bp@...en8.d" <bp@...en8.d>, Ingo Molnar <mingo@...hat.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Zack Rusin <zackr@...are.com>,
        Tim Merrifield <timothym@...are.com>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        "daniel@...ll.ch" <daniel@...ll.ch>,
        "airlied@...il.com" <airlied@...il.com>,
        "tzimmermann@...e.de" <tzimmermann@...e.de>,
        "mripard@...nel.org" <mripard@...nel.org>,
        "maarten.lankhorst@...ux.intel.com" 
        <maarten.lankhorst@...ux.intel.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "richardcochran@...il.com" <richardcochran@...il.com>,
        "linux-input@...r.kernel.org" <linux-input@...r.kernel.org>,
        "dmitry.torokhov@...il.com" <dmitry.torokhov@...il.com>,
        Linux-graphics-maintainer <Linux-graphics-maintainer@...are.com>,
        Pv-drivers <Pv-drivers@...are.com>,
        Nadav Amit <namit@...are.com>, Ajay Kaher <akaher@...are.com>,
        Jeff Sipek <jsipek@...are.com>
Subject: Re: [PATCH 4/6] input/vmmouse: Use vmware_hypercall API

On Nov 24, 2023, at 11:46 AM, Simon Horman <horms@...nel.org> wrote:
> 
> On Wed, Nov 22, 2023 at 03:30:49PM -0800, Alexey Makhalov wrote:
>> Switch from VMWARE_HYPERCALL macro to vmware_hypercall API.
>> Eliminate arch specific code. No functional changes intended.
>> 
>> Signed-off-by: Alexey Makhalov <amakhalov@...are.com>
> 
> Hi Alexey,
> 
> it is not strictly related to this patch, but I notice than an x86_64
> allmodconfig build with W=1 using gcc-13 fails to compile this file.
> 
> It appears that the problem relates to both priv->phys and
> psmouse->ps2dev.serio->phys being 32 bytes.
> 
> 
> drivers/input/mouse/vmmouse.c: In function ‘vmmouse_init’:
> drivers/input/mouse/vmmouse.c:455:53: error: ‘/input1’ directive output may be truncated writing 7 bytes into a region of size between 1 and 32 [-Werror=format-truncation=]
>  455 |         snprintf(priv->phys, sizeof(priv->phys), "%s/input1",
>      |                                                     ^~~~~~~
> drivers/input/mouse/vmmouse.c:455:9: note: ‘snprintf’ output between 8 and 39 bytes into a destination of size 32
>  455 |         snprintf(priv->phys, sizeof(priv->phys), "%s/input1",
>      |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>  456 |                  psmouse->ps2dev.serio->phys);
>      |                  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> 
> ...

Hi Simon, thanks for reporting the issue.
Zack, please take a look.

—Alexey