linux-kernel - Re: [PATCH 09/36] tty/vt: consolemap: use

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Date:   Tue, 7 Jun 2022 16:36:25 +0300 (EEST)
From:   Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
To:     Jiri Slaby <jslaby@...e.cz>
cc:     gregkh@...uxfoundation.org, linux-serial@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 09/36] tty/vt: consolemap: use | for binary addition

On Tue, 7 Jun 2022, Jiri Slaby wrote:

> Unicode letters are composed as a bit shifts and sums of three values.
> Use "|" and not "+" for these bit operations. The former is indeed more
> appropriate.
> 
> Signed-off-by: Jiri Slaby <jslaby@...e.cz>

Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>

> ---
>  drivers/tty/vt/consolemap.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/tty/vt/consolemap.c b/drivers/tty/vt/consolemap.c
> index f97081e01b71..016c1a0b4290 100644
> --- a/drivers/tty/vt/consolemap.c
> +++ b/drivers/tty/vt/consolemap.c
> @@ -265,7 +265,7 @@ static void set_inverse_trans_unicode(struct vc_data *conp,
>  				glyph = p2[k];
>  				if (glyph >= 0 && glyph < MAX_GLYPH
>  					       && q[glyph] < 32)
> -		  			q[glyph] = (i << 11) + (j << 6) + k;
> +					q[glyph] = (i << 11) | (j << 6) | k;
>  			}
>  		}
>  	}
> @@ -788,7 +788,7 @@ int con_get_unimap(struct vc_data *vc, ushort ct, ushort __user *uct, struct uni
>  						continue;
>  					if (ect < ct) {
>  						unilist[ect].unicode =
> -							(i<<11)+(j<<6)+k;
> +							(i<<11) | (j<<6) | k;

I'd have added also the spaces around <<.

-- 
 i.