linux-kernel - Re: [PATCH 05/11] tty: vt: remove char32

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Message-ID: <fb363e72-b85-c20-4b95-e4fce2dad46@linux.intel.com>
Date:   Thu, 12 Jan 2023 11:34:20 +0200 (EET)
From:   Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
To:     "Jiri Slaby (SUSE)" <jirislaby@...nel.org>
cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Kees Cook <keescook@...omium.org>,
        linux-serial <linux-serial@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 05/11] tty: vt: remove char32_t typedef

On Thu, 12 Jan 2023, Jiri Slaby (SUSE) wrote:

> It boils down to uint32_t, so use u32 directly, instead. This makes the
> code more obvious.
> 
> Signed-off-by: Jiri Slaby (SUSE) <jirislaby@...nel.org>
> ---
>  drivers/tty/vt/vt.c | 26 ++++++++++++--------------
>  1 file changed, 12 insertions(+), 14 deletions(-)
> 
> diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c
> index 3ae0212f1aa7..86c18522231b 100644
> --- a/drivers/tty/vt/vt.c
> +++ b/drivers/tty/vt/vt.c

> @@ -550,7 +548,7 @@ void vc_uniscr_copy_line(const struct vc_data *vc, void *dest, bool viewed,
>  		 */
>  		row = (pos - vc->vc_origin) / vc->vc_size_row;
>  		col = ((pos - vc->vc_origin) % vc->vc_size_row) / 2;
> -		memcpy(dest, &uniscr->lines[row][col], nr * sizeof(char32_t));
> +		memcpy(dest, &uniscr->lines[row][col], nr * sizeof(u32));

Btw, could this be ... * sizeof(**uniscr->lines) instead? It would seem 
slightly safer here.

-- 
 i.