[uclinux-dist-devel] [GIT PULL] Blackfin updates for 3.11

[uclinux-dist-devel] [GIT PULL] Blackfin updates for 3.11

[Steven Miao]

Hi Linus and Stephen,

I've signed up for an kernel.org account and moved the blackfin tree to kernel.org for convenience as some developers' suggestion. Pls update the url to:
http://git.kernel.org/pub/scm/linux/kernel/git/realmz6/blackfin-linux.git

Hi Linus,

please pull blackfin updates for Linux 3.11, some minor changes for performance and bug fixes.

The following changes since commit 8bb495e3f02401ee6f76d1b1d77f3ac9f079e376:

  Linux 3.10 (2013-06-30 15:13:29 -0700)

are available in the git repository at:

  http://git.kernel.org/pub/scm/linux/kernel/git/realmz6/blackfin-linux.git tags/blackfin-for-linus

for you to fetch changes up to 150382a53d11256e5666c86525c8bf8d23684532:

  smp: refine bf561 smpboot code (2013-07-09 15:50:38 +0800)

----------------------------------------------------------------
blackfin updates for Linux 3.11

----------------------------------------------------------------
Scott Jiang (1):
      bf609: rename bfin6xx_spi to bfin_spi3

Sonic Zhang (2):
      kgdb: blackfin: include irq_regs.h in kgdb.c
      bf609: add cpu revision 0.1

Steven Miao (2):
      bf609: stmmac: fix build after stmmac_mdio_bus_data changed
      smp: refine bf561 smpboot code

 arch/blackfin/Kconfig                              |    2 +-
 .../include/asm/{bfin6xx_spi.h => bfin_spi3.h}     |    4 ++--
 arch/blackfin/kernel/kgdb.c                        |    1 +
 arch/blackfin/mach-bf561/smp.c                     |    7 +++----
 arch/blackfin/mach-bf609/boards/ezkit.c            |   19 +++++++++----------
 arch/blackfin/mach-common/smp.c                    |   18 ++++++++----------
 6 files changed, 24 insertions(+), 27 deletions(-)
 rename arch/blackfin/include/asm/{bfin6xx_spi.h => bfin_spi3.h} (99%)

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

[Stephen Rothwell]

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Hi Steven,

On Tue, 9 Jul 2013 17:15:30 +0800 Steven Miao <realmz6@kernel.org> wrote:
>
> I've signed up for an kernel.org account and moved the blackfin tree to kernel.org for convenience as some developers' suggestion. Pls update the url to:
> http://git.kernel.org/pub/scm/linux/kernel/git/realmz6/blackfin-linux.git

That tree only has for-linus and master branches.  linux-next uses the
blackfin-linus branch of your github tree ... so what should I use now?

-- 
Cheers,
Stephen Rothwell                    sfr@canb.auug.org.au

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

[Steven Miao]

Hi Stephen,

On Wed, Jul 10, 2013 at 1:55 PM, Stephen Rothwell <sfr@canb.auug.org.au> wrote:
> Hi Steven,
>
> On Tue, 9 Jul 2013 17:15:30 +0800 Steven Miao <realmz6@kernel.org> wrote:
>>
>> I've signed up for an kernel.org account and moved the blackfin tree to kernel.org for convenience as some developers' suggestion. Pls update the url to:
>> http://git.kernel.org/pub/scm/linux/kernel/git/realmz6/blackfin-linux.git
>
> That tree only has for-linus and master branches.  linux-next uses the
> blackfin-linus branch of your github tree ... so what should I use now?
Pls use for-linus branch on
http://git.kernel.org/pub/scm/linux/kernel/git/realmz6/blackfin-linux.git
Thanks.

>
> --
> Cheers,
> Stephen Rothwell                    sfr@canb.auug.org.au

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

[Stephen Rothwell]

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Hi Steven,

On Wed, 10 Jul 2013 14:05:45 +0800 Steven Miao <realmz6@gmail.com> wrote:
>
> Pls use for-linus branch on
> http://git.kernel.org/pub/scm/linux/kernel/git/realmz6/blackfin-linux.git

Done.

-- 
Cheers,
Stephen Rothwell                    sfr@canb.auug.org.au

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

[Geert Uytterhoeven]

Hi Steven,

On Tue, Jul 9, 2013 at 11:15 AM, Steven Miao <realmz6@kernel.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);
  }
 }

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@linux-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

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

[Linus Torvalds]

On Mon, Jul 15, 2013 at 10:28 AM, Geert Uytterhoeven
<geert@linux-m68k.org> wrote:
>
> but the first one is non-trivial: using xchg() on atomic_t is a bit gross...

It's also broken. There's no guarantee that an "atomic_t" is just a
value. Now, the old sparc32 stuff (which hid lock bits in atomic_t)
may be gone, but it's still the case that atomic_t may not actually
work with xchg.

(In *practice* it works on normal architectures, so I'm not saying
that we don't have it, but it's a bug if we do).

There are "atomic_xchg()" and "atomic_xchg64()" functions that are supported.

             Linus

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

[Steven Miao]

On Tue, Jul 16, 2013 at 1:49 AM, Linus Torvalds
<torvalds@linux-foundation.org> wrote:
> On Mon, Jul 15, 2013 at 10:28 AM, Geert Uytterhoeven
> <geert@linux-m68k.org> wrote:
>>
>> but the first one is non-trivial: using xchg() on atomic_t is a bit gross...
>
> It's also broken. There's no guarantee that an "atomic_t" is just a
> value. Now, the old sparc32 stuff (which hid lock bits in atomic_t)
> may be gone, but it's still the case that atomic_t may not actually
> work with xchg.
>
> (In *practice* it works on normal architectures, so I'm not saying
> that we don't have it, but it's a bug if we do).
>
> There are "atomic_xchg()" and "atomic_xchg64()" functions that are supported.
I'll send a patch to fix it.
>
>              Linus

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

[Steven Miao]

Hi Geert,

On Tue, Jul 16, 2013 at 1:28 AM, Geert Uytterhoeven
<geert@linux-m68k.org> wrote:
> Hi Steven,
>
> On Tue, Jul 9, 2013 at 11:15 AM, Steven Miao <realmz6@kernel.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@linux-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