linux-kernel - Re: [PATCH] staging: fbtft: Do not use binary constants

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Date:	Tue, 10 Mar 2015 22:53:43 +0100
From:	Geert Uytterhoeven <geert@...ux-m68k.org>
To:	Joe Perches <joe@...ches.com>
Cc:	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
	Noralf Trønnes <noralf@...nnes.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	driverdevel <devel@...verdev.osuosl.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] staging: fbtft: Do not use binary constants

Hi Joe,

On Tue, Mar 10, 2015 at 10:50 PM, Joe Perches <joe@...ches.com> wrote:
> On Tue, 2015-03-10 at 22:34 +0100, Geert Uytterhoeven wrote:
>> Gcc < 4.3 doesn't understand binary constants (0b*):
>
> trivia:
>
>> diff --git a/drivers/staging/fbtft/fb_hx8340bn.c b/drivers/staging/fbtft/fb_hx8340bn.c
> []
>> @@ -156,10 +156,10 @@ static int set_var(struct fbtft_par *par)
>>  static int set_gamma(struct fbtft_par *par, unsigned long *curves)
>>  {
>>       unsigned long mask[] = {
>
> static const

"static const u8", and convert all the wasteful "unsigned long" curve arrays
to u8 arrays, as they store 5-bit quantities only.

This is staging, so your eyes start hurting as soon as you dive into it...

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds
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