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From: Sascha Hauer <s.hauer@pengutronix.de>
To: Andrey Smirnov <andrew.smirnov@gmail.com>
Cc: barebox@lists.infradead.org
Subject: Re: [PATCH 00/27] Console code consolidation
Date: Fri, 15 Jun 2018 11:28:58 +0200	[thread overview]
Message-ID: <20180615092857.yrvh4pgs4ccu2pum@pengutronix.de> (raw)
In-Reply-To: <20180615041136.23492-1-andrew.smirnov@gmail.com>

Hi Andrey,

On Thu, Jun 14, 2018 at 09:11:06PM -0700, Andrey Smirnov wrote:
> Everyone:
> 
> While debugging the reason behind print_hex_dump() not producing
> carriage return properly, when used in PBL, I realised that current
> codebase contained:
> 
>  - at least 5 places where '\n' was replaced with '\n\r'
>  - at least 3 almost identical implementations of puts()
>  - at least 3 almost identical implementations of printf()
> 
> so this patcheset is an attempt to consolidate, share and simplify
> console related code.

The console support really deserves some cleanup. We have the LL console
support, PBL console support, regular console support and simple console
support, all mixed into a single codebase so that it's sometimes really
hard to understand what is going on.

Instead of optimizing the different variants for better code sharing I
wonder if we could not consolidate some of the console types to reduce
the number of variants in the code.  PBL console works by calling
pbl_set_putc() to specify a putc function.  PUTC_LL instead works by
putting a PUTC_LL function into a SoC specific header function. Instead
each board could provide its own putc function, say board_putc() or so.
This would be enough to replace the DEBUG_LL and the PBL console
support.

Then I don't like weak functions. It can provide nifty solutions to some
problems, but I think it also often leads to situations where you don't
really know if something has been overwritten or with what is has been
overwritten with. I don't consider replacing ifdefs with weak functions
a general improvment.

Sascha

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  parent reply	other threads:[~2018-06-15  9:29 UTC|newest]

Thread overview: 45+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-06-15  4:11 Andrey Smirnov
2018-06-15  4:11 ` [PATCH 01/27] pbl: console: Introduce putc_func_t Andrey Smirnov
2018-06-15  4:11 ` [PATCH 02/27] console: Unify console_simple.c and pbl/console.c Andrey Smirnov
2018-06-15  4:49   ` Sam Ravnborg
2018-06-15 12:22     ` Andrey Smirnov
2018-06-15  4:58   ` Sam Ravnborg
2018-06-15  7:26     ` Sascha Hauer
2018-06-15 11:36       ` Andrey Smirnov
2018-06-15 12:18     ` Andrey Smirnov
2018-06-15  4:11 ` [PATCH 03/27] pbl: console: Move '\n' handling into console_putc() Andrey Smirnov
2018-06-15  4:11 ` [PATCH 04/27] console: Reconcile 3 different puts() implementations Andrey Smirnov
2018-06-15  7:37   ` Sascha Hauer
2018-06-15 11:33     ` Andrey Smirnov
2018-06-15  4:11 ` [PATCH 05/27] ratp: Add dependency on CONSOLE_FULL Andrey Smirnov
2018-06-15  4:11 ` [PATCH 06/27] netconsole: " Andrey Smirnov
2018-06-15  4:11 ` [PATCH 07/27] input: " Andrey Smirnov
2018-06-15  4:11 ` [PATCH 08/27] console: Make use of __console_putc() Andrey Smirnov
2018-06-15  4:11 ` [PATCH 09/27] console: Fix console_get_first_active() Andrey Smirnov
2018-06-15  4:11 ` [PATCH 10/27] console: Simplify early console code Andrey Smirnov
2018-06-15  4:11 ` [PATCH 11/27] console: Consolidate all implemenatations of ctrlc() Andrey Smirnov
2018-06-15  4:11 ` [PATCH 12/27] console: Drop ARCH_HAS_CTRLC Andrey Smirnov
2018-06-15  4:11 ` [PATCH 13/27] console: Consolidate DEBUG_LL and CONSOLE_* '\n' -> '\n\r' code Andrey Smirnov
2018-06-18 20:18   ` Sascha Hauer
2018-06-18 20:25     ` Andrey Smirnov
2018-06-15  4:11 ` [PATCH 14/27] console: Consolidate DEBUG_LL and CONSOLE_* puts() implementations Andrey Smirnov
2018-06-18 20:22   ` Sascha Hauer
2018-06-18 20:26     ` Andrey Smirnov
2018-06-15  4:11 ` [PATCH 15/27] console_simple: Use console_flush() from CONSOLE_FULL Andrey Smirnov
2018-06-15  4:11 ` [PATCH 16/27] console_simple: Use tstc_raw() as tstc() Andrey Smirnov
2018-06-15  4:11 ` [PATCH 17/27] console_simple: Use getc_raw() as getchar() Andrey Smirnov
2018-06-15  4:11 ` [PATCH 18/27] console_simple: Get rid of global console pointer Andrey Smirnov
2018-06-15  4:11 ` [PATCH 19/27] console_simple: Make use of list_add_tail() Andrey Smirnov
2018-06-15  4:11 ` [PATCH 20/27] console: Share definition for printf with PBL Andrey Smirnov
2018-06-15  4:11 ` [PATCH 21/27] pbl: console: Convert pr_print into a single line #define Andrey Smirnov
2018-06-15  4:11 ` [PATCH 22/27] " Andrey Smirnov
2018-06-15  4:11 ` [PATCH 23/27] console: Remove dputc() Andrey Smirnov
2018-06-15  4:11 ` [PATCH 24/27] console: Simplify dputs() Andrey Smirnov
2018-06-15  4:11 ` [PATCH 25/27] console: Introduce dvprintf() Andrey Smirnov
2018-06-15  4:11 ` [PATCH 26/27] console: Convert printf() into a single line #define Andrey Smirnov
2018-06-15  4:11 ` [PATCH 27/27] psci: console: Convert to use lib/console.c Andrey Smirnov
2018-06-15  9:28 ` Sascha Hauer [this message]
2018-06-15 12:11   ` [PATCH 00/27] Console code consolidation Andrey Smirnov
2018-06-18 20:49     ` Sascha Hauer
2018-06-18 23:26       ` Andrey Smirnov
2018-06-19  6:44         ` Sascha Hauer

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