From: Geert Uytterhoeven <geert@linux-m68k.org>
To: Arnd Bergmann <arnd@arndb.de>
Cc: Thomas Gleixner <tglx@linutronix.de>,
Ley Foon Tan <lftan@altera.com>,
Linux-Arch <linux-arch@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-doc@vger.kernel.org" <linux-doc@vger.kernel.org>,
Chung-Lin Tang <cltang@codesourcery.com>
Subject: Re: [PATCH v2 21/29] nios2: Futex operations
Date: Tue, 5 Aug 2014 10:49:59 +0200 [thread overview]
Message-ID: <CAMuHMdVRwTefEsKOMb2gotq5b7JoQ7Z2a8-5dERD7r4MwJdTvg@mail.gmail.com> (raw)
In-Reply-To: <5659104.6O7AZx76W6@wuerfel>
On Fri, Jul 18, 2014 at 11:55 AM, Arnd Bergmann <arnd@arndb.de> wrote:
> On Friday 18 July 2014 11:42:34 Thomas Gleixner wrote:
>> On Fri, 18 Jul 2014, Arnd Bergmann wrote:
>> > On Friday 18 July 2014 14:07:42 Ley Foon Tan wrote:
>> > > On Thu, Jul 17, 2014 at 7:07 PM, Arnd Bergmann <arnd@arndb.de> wrote:
>> > If this understanding is right, we can probably just merge the
>> > m68k implementation into the asm-generic version, as that does
>> > exactly that, and just isn't SMP safe. I'm still unsure whether
>> > I'm missing something here though, as everything else seems to
>> > do this in assembly, even for non-SMP machines that could use
>> > the trivial method that m68k has.
>>
>> For UP relying of pagefault disable should be good enough indeed. I
>> guess the asm for the other UP stuff results from looking at
>> architectures or copying from architectures which did this in ASM
>
> Ok, thanks for the confirmation!
>
> Ley Foon Tan, I think the best way forward then is for you to
> take the m68k code and copy (or move) that into asm-generic/futex.h
> under an #ifndef CONFIG_SMP.
Yes, that should work.
I tried that a while ago for OpenRISC, but never cleant it up and sent it out.
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
next prev parent reply other threads:[~2014-08-05 8:50 UTC|newest]
Thread overview: 109+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-15 8:45 [PATCH v2 00/29] nios2 Linux kernel port Ley Foon Tan
2014-07-15 8:45 ` [PATCH v2 01/29] nios2: Assembly macros and definitions Ley Foon Tan
2014-07-15 8:45 ` [PATCH v2 02/29] nios2: Kernel booting and initialization Ley Foon Tan
2014-07-30 9:12 ` Tobias Klauser
2014-07-30 10:58 ` Ley Foon Tan
2014-07-15 8:45 ` [PATCH v2 03/29] nios2: Exception handling Ley Foon Tan
2014-07-15 8:45 ` [PATCH v2 04/29] nios2: Traps exception handling Ley Foon Tan
2014-07-15 8:45 ` [PATCH v2 05/29] nios2: Memory management Ley Foon Tan
2014-07-28 14:59 ` Geert Uytterhoeven
2014-07-30 6:42 ` Ley Foon Tan
2014-07-30 8:18 ` Geert Uytterhoeven
2014-07-30 8:57 ` Tobias Klauser
2014-07-30 10:52 ` Ley Foon Tan
2014-07-30 9:01 ` Tobias Klauser
2014-07-30 10:50 ` Ley Foon Tan
2014-07-15 8:45 ` [PATCH v2 06/29] nios2: I/O Mapping Ley Foon Tan
2014-07-15 9:22 ` Arnd Bergmann
2014-07-15 10:51 ` Ley Foon Tan
2014-07-15 8:45 ` [PATCH v2 07/29] nios2: MMU Fault handling Ley Foon Tan
2014-07-15 8:45 ` [PATCH v2 08/29] nios2: Page table management Ley Foon Tan
2014-07-15 8:45 ` [PATCH v2 09/29] nios2: Process management Ley Foon Tan
2014-07-15 8:45 ` [PATCH v2 10/29] nios2: Cache handling Ley Foon Tan
2014-07-15 8:45 ` [PATCH v2 11/29] nios2: TLB handling Ley Foon Tan
2014-07-15 8:45 ` [PATCH v2 12/29] nios2: Interrupt handling Ley Foon Tan
2014-07-15 9:27 ` Arnd Bergmann
2014-07-17 6:15 ` Ley Foon Tan
2014-07-17 9:24 ` Arnd Bergmann
2014-07-17 10:48 ` Ley Foon Tan
2014-07-15 9:51 ` Thomas Gleixner
2014-07-17 6:33 ` Ley Foon Tan
2014-07-17 13:58 ` Thomas Gleixner
2014-07-18 6:55 ` Ley Foon Tan
2014-07-15 8:45 ` [PATCH v2 13/29] nios2: DMA mapping API Ley Foon Tan
2014-07-15 9:38 ` Arnd Bergmann
2014-07-24 11:37 ` Ley Foon Tan
2014-07-24 12:05 ` Arnd Bergmann
2014-07-28 15:48 ` rkuo
2014-07-30 3:42 ` Ley Foon Tan
2014-07-30 12:56 ` James Bottomley
2014-07-15 8:45 ` [PATCH v2 14/29] nios2: ELF definitions Ley Foon Tan
2014-07-15 8:45 ` [PATCH v2 15/29] nios2: System calls handling Ley Foon Tan
2014-07-18 12:56 ` James Hogan
2014-07-21 11:17 ` Ley Foon Tan
2014-07-15 8:45 ` [PATCH v2 16/29] nios2: Signal handling support Ley Foon Tan
2014-07-18 8:04 ` Richard Weinberger
2014-08-08 7:21 ` Ley Foon Tan
2014-07-15 8:45 ` [PATCH v2 17/29] nios2: Library functions Ley Foon Tan
2014-07-15 8:45 ` [PATCH v2 18/29] nios2: Device tree support Ley Foon Tan
2014-07-15 9:41 ` Arnd Bergmann
2014-07-15 10:02 ` Ley Foon Tan
2014-07-15 8:45 ` [PATCH v2 19/29] nios2: Time keeping Ley Foon Tan
2014-07-15 9:45 ` Arnd Bergmann
2014-07-21 10:07 ` Ley Foon Tan
2014-07-21 10:51 ` Arnd Bergmann
2014-07-21 11:10 ` Ley Foon Tan
2014-07-15 10:00 ` Thomas Gleixner
2014-07-21 11:09 ` Ley Foon Tan
2014-07-21 12:35 ` Thomas Gleixner
2014-07-15 8:45 ` [PATCH v2 20/29] nios2: Cpuinfo handling Ley Foon Tan
2014-07-15 9:47 ` Arnd Bergmann
2014-07-18 2:43 ` Ley Foon Tan
2014-08-07 5:06 ` Ley Foon Tan
2014-07-15 8:45 ` [PATCH v2 21/29] nios2: Futex operations Ley Foon Tan
2014-07-15 10:03 ` Thomas Gleixner
2014-07-17 10:55 ` Ley Foon Tan
2014-07-17 11:07 ` Arnd Bergmann
2014-07-18 6:07 ` Ley Foon Tan
2014-07-18 9:09 ` Arnd Bergmann
2014-07-18 9:42 ` Thomas Gleixner
2014-07-18 9:55 ` Arnd Bergmann
2014-07-21 3:20 ` Ley Foon Tan
2014-07-21 8:01 ` Arnd Bergmann
2014-07-21 10:24 ` Ley Foon Tan
2014-08-05 8:49 ` Geert Uytterhoeven [this message]
2014-07-15 8:45 ` [PATCH v2 22/29] nios2: Miscellaneous header files Ley Foon Tan
2014-07-15 10:22 ` Arnd Bergmann
2014-07-15 11:03 ` Chung-Lin Tang
2014-07-15 12:27 ` Arnd Bergmann
2014-07-18 6:15 ` Chung-Lin Tang
2014-07-18 9:18 ` Arnd Bergmann
2014-07-16 7:03 ` Ley Foon Tan
2014-07-15 8:45 ` [PATCH v2 23/29] nios2: Nios2 registers Ley Foon Tan
2014-07-15 8:45 ` [PATCH v2 24/29] nios2: Module support Ley Foon Tan
2014-07-15 10:24 ` Arnd Bergmann
2014-07-15 11:12 ` Tobias Klauser
2014-07-15 12:21 ` Arnd Bergmann
2014-07-16 1:36 ` LF.Tan
2014-07-16 1:32 ` Ley Foon Tan
2014-07-15 8:45 ` [PATCH v2 25/29] nios2: ptrace support Ley Foon Tan
2014-07-15 8:45 ` [PATCH v2 26/29] Add ELF machine define for Nios2 Ley Foon Tan
2014-07-15 9:04 ` Tobias Klauser
2014-07-15 9:40 ` Ley Foon Tan
2014-07-15 8:45 ` [PATCH v2 27/29] MAINTAINERS: Add nios2 maintainer Ley Foon Tan
2014-07-15 11:10 ` Joe Perches
2014-07-16 1:08 ` Ley Foon Tan
2014-07-15 8:45 ` [PATCH v2 28/29] Documentation: Add documentation for Nios2 architecture Ley Foon Tan
2014-07-15 8:45 ` [PATCH v2 29/29] nios2: Build infrastructure Ley Foon Tan
2014-07-16 19:50 ` Paul Bolle
2014-07-17 9:35 ` Sam Ravnborg
2014-07-15 9:08 ` [PATCH v2 00/29] nios2 Linux kernel port Tobias Klauser
2014-07-15 9:38 ` Ley Foon Tan
2014-07-15 11:15 ` Tobias Klauser
2014-07-16 1:21 ` Ley Foon Tan
2014-07-15 13:16 ` David Howells
2014-07-15 13:19 ` Richard Weinberger
2014-07-15 14:20 ` David Howells
2014-07-15 20:27 ` Richard Weinberger
2014-07-15 22:36 ` David Howells
2014-07-15 22:45 ` Greg KH
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