linux-kernel - Re: [uclinux-dist-devel] [GIT PULL] Blackfin updates for 3.11

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Message-ID: <CAMk6uBmHe9TOxfyrVfJ3BwmvPK3kAY81X=h6Ebed1W1GzNOYnQ@mail.gmail.com>
Date:	Tue, 16 Jul 2013 13:15:22 +0800
From:	Steven Miao <realmz6@...il.com>
To:	Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:	Steven Miao <realmz6@...nel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Stephen Rothwell <sfr@...b.auug.org.au>,
	"uclinux-dist-devel@...ckfin.uclinux.org" 
	<uclinux-dist-devel@...ckfin.uclinux.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [uclinux-dist-devel] [GIT PULL] Blackfin updates for 3.11

Hi Geert,

On Tue, Jul 16, 2013 at 1:28 AM, Geert Uytterhoeven
<geert@...ux-m68k.org> wrote:
> Hi Steven,
>
> On Tue, Jul 9, 2013 at 11:15 AM, Steven Miao <realmz6@...nel.org> wrote:
>> Steven Miao (2):
>>       smp: refine bf561 smpboot code
>
> Unfortunately this landed too late in -next to notice:
>
> arch/blackfin/mach-common/smp.c:150:2: error: conversion to non-scalar
> type requested
> arch/blackfin/mach-common/smp.c:185:23: error: incompatible types when
> assigning to type 'atomic_t' from type 'int'
> arch/blackfin/mach-common/smp.c:186:24: error: incompatible types when
> assigning to type 'atomic_t' from type 'int'
> make[2]: *** [arch/blackfin/mach-common/smp.o] Error 1
>
> http://kisskb.ellerman.id.au/kisskb/buildresult/9115952/
>
> It's a bit embarrassing to break your own core code (with a patch that was
> submitted for public review in August 2012?).
>
> The last two can be trivially-fixed with the following
> (whitespace-damaged gmail)
> patch:
>
> --- a/arch/blackfin/mach-common/smp.c
> +++ b/arch/blackfin/mach-common/smp.c
> @@ -182,8 +182,8 @@ static void bfin_ipi_init(void)
>   struct ipi_data *bfin_ipi_data;
>   for_each_possible_cpu(cpu) {
>   bfin_ipi_data = &per_cpu(bfin_ipi, cpu);
> - bfin_ipi_data->bits = 0;
> - bfin_ipi_data->count = 0;
> + atomic_set(&bfin_ipi_data->bits, 0);
> + atomic_set(&bfin_ipi_data->count, 0);
>   }
>  }

Sorry, I should use atomic_ops to hanle atomic_t type.
>
> but the first one is non-trivial: using xchg() on atomic_t is a bit gross...
>
> 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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