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

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Message-ID: <20110928082430.GA29264@elte.hu>
Date:	Wed, 28 Sep 2011 10:24:30 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
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


* Jeremy Fitzhardinge <jeremy@...p.org> wrote:

> 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(-)

Pulled, thanks Jeremy!

	Ingo
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