From: Robert Abel <rabel@robertabel.eu>
To: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>,
Willy Tarreau <w@1wt.eu>,
Geert Uytterhoeven <geert@linux-m68k.org>,
linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 1/3] auxdisplay: charlcd: fix hex literal ranges for graphics command
Date: Mon, 26 Feb 2018 00:34:19 +0100 [thread overview]
Message-ID: <9ec3c54c-f8fe-22d7-783e-8cf9862405bb@robertabel.eu> (raw)
In-Reply-To: <CAHp75Vd1u0RxzE7WR444p0n+yutErp6OJUrqm1za=JcY0C=+ig@mail.gmail.com>
Hi Andy,
On 15 Feb 2018 11:57, Andy Shevchenko wrote:
> On Thu, Feb 15, 2018 at 1:17 AM, Robert Abel <rabel@robertabel.eu> wrote:
>> hex_to_bin look fine to me, although personally I'm not a big fan of its
>> use of tolower.
>
> Let's duplicate then over and over?
I was speaking more generally about performance here. There is a reason
for kstrtox.c:57
(https://elixir.bootlin.com/linux/v4.14.7/source/lib/kstrtox.c#L57)
> unsigned int lc = c | 0x20; /* don't tolower() this line */
> Can you point to the documentation where user can easily (w/o reading
> the code) get how it suppose to be?
Unfortunately not. I read the code myself to know how it is supposed to
work. That's definitely a gap in documentation.
> On Thu, Feb 15, 2018 at 1:17 AM, Robert Abel <rabel@robertabel.eu> wrote:
>> I noticed the only part of the code that does make use of library
>> functions, parsing x and y coordinates using kstrtoul, is broken.
>> Apparently it used to use simple_strtoul, which worked and then got
>> replaced.
> By which commit?
129957069e6af42a6e021d90679c56662c95f7e1
(https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=129957069e6af42a6e021d90679c56662c95f7e1)
I'll try to answer to this email with relevant patches for charlcd.c.
Regards,
Robert
next prev parent reply other threads:[~2018-02-25 23:34 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-09 23:50 [PATCH 0/3] auxdisplay: charlcd: miscellaneous patches Robert Abel
2018-02-09 23:50 ` [PATCH 1/3] auxdisplay: charlcd: fix hex literal ranges for graphics command Robert Abel
2018-02-09 23:50 ` [PATCH 2/3] auxdisplay: charlcd: use null character instead of zero literal to terminate strings Robert Abel
2018-02-09 23:50 ` [PATCH 3/3] auxdisplay: charlcd: replace octal literal with form-feed escape sequence Robert Abel
2018-02-10 9:43 ` Miguel Ojeda
2018-02-10 9:29 ` [PATCH 2/3] auxdisplay: charlcd: use null character instead of zero literal to terminate strings Miguel Ojeda
2018-02-10 8:58 ` [PATCH 1/3] auxdisplay: charlcd: fix hex literal ranges for graphics command Miguel Ojeda
2018-02-10 9:20 ` Willy Tarreau
2018-02-10 9:41 ` Miguel Ojeda
2018-02-12 13:56 ` Miguel Ojeda
2018-02-13 13:36 ` Andy Shevchenko
2018-02-13 19:15 ` Willy Tarreau
2018-02-14 23:17 ` Robert Abel
2018-02-15 10:57 ` Andy Shevchenko
2018-02-25 23:34 ` Robert Abel [this message]
2018-02-25 23:52 ` Robert Abel
2018-02-25 23:54 ` Robert Abel
2018-02-25 23:54 ` [PATCH 1/4] auxdisplay: charlcd: fix two-line command ^[[LN not marked as processed Robert Abel
2018-02-25 23:54 ` [PATCH 2/4] auxdisplay: charlcd: name x/y address struct Robert Abel
2018-02-25 23:54 ` [PATCH 3/4] auxdisplay: charlcd: fix x/y address commands Robert Abel
2018-02-25 23:54 ` [PATCH 4/4] auxdisplay: charlcd: make home command unshift display Robert Abel
2018-02-26 17:16 ` Miguel Ojeda
2018-02-26 8:46 ` [PATCH 3/4] auxdisplay: charlcd: fix x/y address commands Geert Uytterhoeven
2018-02-26 22:29 ` Robert Abel
2018-02-26 11:44 ` Andy Shevchenko
2018-02-26 16:54 ` Miguel Ojeda
2018-02-26 17:09 ` Andy Shevchenko
2018-02-26 17:26 ` Miguel Ojeda
2018-02-26 17:56 ` Andy Shevchenko
2018-02-26 23:00 ` Robert Abel
2018-02-26 22:38 ` Robert Abel
2018-02-26 23:06 ` Miguel Ojeda
2018-02-26 16:49 ` Miguel Ojeda
2018-02-26 16:57 ` Miguel Ojeda
2018-02-26 22:43 ` Robert Abel
2018-02-27 5:19 ` Willy Tarreau
2018-02-27 19:31 ` Miguel Ojeda
2018-02-27 23:29 ` Robert Abel
2018-02-28 0:05 ` [PATCH RFC 0/2] auxdisplay: charlcd: fix movement and home commands Robert Abel
2018-02-28 0:05 ` [PATCH 1/2] auxdisplay: charlcd: fix x/y address commands Robert Abel
2018-02-28 0:05 ` [PATCH 2/2] auxdisplay: charlcd: make home command unshift display Robert Abel
2018-02-28 4:21 ` [PATCH 3/4] auxdisplay: charlcd: fix x/y address commands Willy Tarreau
2018-02-26 23:05 ` Robert Abel
2018-02-27 5:20 ` Willy Tarreau
2018-02-26 8:35 ` [PATCH 2/4] auxdisplay: charlcd: name x/y address struct Geert Uytterhoeven
2018-02-26 15:59 ` Miguel Ojeda
2018-02-26 8:34 ` [PATCH 1/4] auxdisplay: charlcd: fix two-line command ^[[LN not marked as processed Geert Uytterhoeven
2018-02-26 15:53 ` Miguel Ojeda
2018-02-26 23:08 ` [PATCH 1/3] auxdisplay: charlcd: fix hex literal ranges for graphics command Robert Abel
2018-02-10 18:31 ` Geert Uytterhoeven
2018-02-10 18:58 ` Willy Tarreau
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