linux-kernel - Re: [PATCH 10/36] tty/vt: consolemap: introduce UNI

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Date:   Wed, 8 Jun 2022 10:18:24 +0200
From:   Jiri Slaby <jirislaby@...nel.org>
To:     Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-serial <linux-serial@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 10/36] tty/vt: consolemap: introduce UNI_*() macros

On 08. 06. 22, 10:02, Ilpo Järvinen wrote:
> It doesn't raise any warnings if I do:
> 
> #define UNI_DIR_BITS           GENMASK(15, 11)
> 
> As UNI_DIRS is 32 it cannot ever be larger than that?

Right, conv_uni_to_pc() properly checks:
   if (ucs > 0xffff)
       return -4;
before
   dir = dict->uni_pgdir[UNI_DIR(ucs)];


Even better!

I also noted to my TODO to check why ucs is "long" there. It makes no 
sense at all. Be it negative, or long-sized. IMO, it should simply be u32.

There is so much crap in the code :/...

thanks,
-- 
js
suse labs