linux-kernel - Re: [RFC PATCH v2 2/3] getcpu_cache: wire up ARM system call

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Message-ID: <1521030890.6359.1453935819051.JavaMail.zimbra@efficios.com>
Date:	Wed, 27 Jan 2016 23:03:39 +0000 (UTC)
From:	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
To:	Russell King - ARM Linux <linux@....linux.org.uk>
Cc:	Thomas Gleixner <tglx@...utronix.de>, Paul Turner <pjt@...gle.com>,
	Andrew Hunter <ahh@...gle.com>,
	Peter Zijlstra <peterz@...radead.org>,
	linux-kernel@...r.kernel.org,
	linux-api <linux-api@...r.kernel.org>,
	Andy Lutomirski <luto@...capital.net>,
	Andi Kleen <andi@...stfloor.org>,
	Dave Watson <davejwatson@...com>, Chris Lameter <cl@...ux.com>,
	Ingo Molnar <mingo@...hat.com>, Ben Maurer <bmaurer@...com>,
	rostedt <rostedt@...dmis.org>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Josh Triplett <josh@...htriplett.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will.deacon@....com>,
	Michael Kerrisk <mtk.manpages@...il.com>
Subject: Re: [RFC PATCH v2 2/3] getcpu_cache: wire up ARM system call

----- On Jan 27, 2016, at 1:46 PM, Mathieu Desnoyers mathieu.desnoyers@...icios.com wrote:

> ----- On Jan 27, 2016, at 1:19 PM, Russell King - ARM Linux
> linux@....linux.org.uk wrote:
> 
>> On Wed, Jan 27, 2016 at 11:54:42AM -0500, Mathieu Desnoyers wrote:
>>> Wire up the getcpu cache system call on 32-bit ARM. Call the
>> 
>> You should note that your chosen system call number of 391 is temporary
>> here and can't be relied upon as we have to wire up the new
>> copy_file_range() call on ARM (which I've just committed the patch for.)
>> 
>> I'd much prefer the wiring up to be either an entirely separate patch
>> (which must be submitted to me, and I'll merge between -rc1 and -rc2
>> along with any other syscall updates) or you leave the wiring up to me.
>> 
>> This is so that I can ensure that (a) system calls numbers are not
>> duplicated and (b) ensure that we follow the same logical order as x86
>> where possible.
> 
> Just to make sure I understand: you would prefer if I split this
> patch into two: one that adds the getcpu_cache_handle_notify_resume()
> call in the resume notifier ("getcpu_cache ARM architecture support"),
> and a separate patch for wiring up the system call ?

I just refactored my patchset as described above (for upcoming v3). Just
to make sure there is no confusion, I target Linux 4.6 for this patchset,
since the 4.5 merge window is closed.

Thanks,

Mathieu

> 
> Thanks,
> 
> Mathieu
> 
>> 
>> Thanks.
>> 
>> --
>> RMK's Patch system: http://www.arm.linux.org.uk/developer/patches/
>> FTTC broadband for 0.8mile line: currently at 9.6Mbps down 400kbps up
>> according to speedtest.net.
> 
> --
> Mathieu Desnoyers
> EfficiOS Inc.
> http://www.efficios.com

-- 
Mathieu Desnoyers
EfficiOS Inc.
http://www.efficios.com