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

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Message-ID: <1011987684.6168.1453920399905.JavaMail.zimbra@efficios.com>
Date:	Wed, 27 Jan 2016 18:46:39 +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 1:19 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 perfer 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 ?

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