From mboxrd@z Thu Jan  1 00:00:00 1970
From: catalin.marinas@arm.com (Catalin Marinas)
Date: Wed, 11 Dec 2013 14:27:05 +0000
Subject: [PATCH 1/6] arm64: Add asm/cpu.h
In-Reply-To: <20131211142308.GY11468@sirena.org.uk>
References: <1386767606-6391-1-git-send-email-broonie@kernel.org>
 <20131211141018.GC596@darko.cambridge.arm.com>
 <20131211142308.GY11468@sirena.org.uk>
Message-ID: <20131211142705.GE596@darko.cambridge.arm.com>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

On Wed, Dec 11, 2013 at 02:23:08PM +0000, Mark Brown wrote:
> On Wed, Dec 11, 2013 at 02:10:19PM +0000, Catalin Marinas wrote:
> > On Wed, Dec 11, 2013 at 01:13:21PM +0000, Mark Brown wrote:
> 
> > > +struct cpuinfo_arm {
> > > +	struct cpu	cpu;
> > > +	u64		cpuid;
> > > +#ifdef CONFIG_SMP
> > > +	unsigned int	loops_per_jiffy;
> > > +#endif
> > > +};
> 
> > How is this structure used? I haven't seen the ACPI code doing anything
> > with struct cpu (though I haven't dug deep enough). Also loops_per_jiffy
> > is useless, that's related to the delay loop based on the generic timer.
> 
> Now I look again we can probably drop this for the toplogy work - it had
> been pulled in as part of pulling things in from pre-v8 and the cpuid
> was used in the code while I was working on it but isn't any more unless
> I'm misreading the code.  
> 
> I don't know what the ACPI guys are doing wtih it, I just saw they added
> the same thing.

It looked to me that for ACPI and empty asm/cpu.h file would do for now.
There are a couple of prototypes for CPU hotplug I think but haven't
seen the structure used (not even the x86_cpu one).

-- 
Catalin