linux-kernel - Re: Could you reinstate ticketlock cleanups in tip.git

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Date:	Tue, 27 Sep 2011 23:40:41 -0700
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	Ingo Molnar <mingo@...e.hu>
CC:	"H. Peter Anvin" <hpa@...or.com>,
	the arch/x86 maintainers <x86@...nel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"xen-devel@...ts.xensource.com" <xen-devel@...ts.xensource.com>
Subject: Re: Could you reinstate ticketlock cleanups in tip.git

On 09/27/2011 11:31 PM, Ingo Molnar wrote:
> * Thomas Gleixner <tglx@...utronix.de> wrote:
>
>> Hi Thomas,
>>
>> Could you reinstate the ticketlock cleanup series in tip.git (I think it
>> was in x86/spinlocks) from
>>     git://github.com/jsgf/linux-xen.git upstream/ticketlock-cleanup
>>
>> This branch is the final result of all the discussions and revisions and
>> is ready for the next merge window.  It's the one that's been in
>> linux-next for a couple of weeks (at least), and won't cause any
>> conflicts there.
>>
>> Or if you prefer I can submit it myself for next merge window.
>>
>> Thanks,
>>     J
> I'd prefer if this went via x86/spinlocks. Could you please send a 
> proper pull request with diffstat, shortlog, etc?
>

Sure, here you are:

The following changes since commit c6a389f123b9f68d605bb7e0f9b32ec1e3e14132:

  Linux 3.1-rc4 (2011-08-28 21:16:01 -0700)

are available in the git repository at:
  git://github.com/jsgf/linux-xen upstream/ticketlock-cleanup
(commit 4a7f340c6a75ec5fca23d9c80a59f3f28cc4a61e)

Jeremy Fitzhardinge (12):
      x86, cmpxchg: <linux/alternative.h> has LOCK_PREFIX
      x86, cmpxchg: Move 32-bit __cmpxchg_wrong_size to match 64 bit.
      x86, cmpxchg: Move 64-bit set64_bit() to match 32-bit
      x86, cmpxchg: Unify cmpxchg into cmpxchg.h
      x86: Add xadd helper macro
      x86: Use xadd helper more widely
      x86, ticketlock: Clean up types and accessors
      x86, ticketlock: Convert spin loop to C
      x86, ticketlock: Convert __ticket_spin_lock to use xadd()
      x86, ticketlock: Make __ticket_spin_trylock common
      x86, cmpxchg: Use __compiletime_error() to make usage messages a bit nicer
      x86, ticketlock: remove obsolete comment

 arch/x86/include/asm/atomic.h         |    8 +-
 arch/x86/include/asm/atomic64_64.h    |    6 +-
 arch/x86/include/asm/cmpxchg.h        |  205 +++++++++++++++++++++++++++++++++
 arch/x86/include/asm/cmpxchg_32.h     |  114 ------------------
 arch/x86/include/asm/cmpxchg_64.h     |  131 ---------------------
 arch/x86/include/asm/rwsem.h          |    8 +-
 arch/x86/include/asm/spinlock.h       |  114 +++++--------------
 arch/x86/include/asm/spinlock_types.h |   22 +++-
 arch/x86/include/asm/uv/uv_bau.h      |    6 +-
 9 files changed, 257 insertions(+), 357 deletions(-)

Thanks,
	J

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