linux-kernel - Re: linux-next: Tree for Sep 1

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Date:	Sun, 14 Sep 2014 01:40:55 -0400
From:	Jason Cooper <jason@...edaemon.net>
To:	Christoph Lameter <cl@...ux.com>
Cc:	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
	Mark Brown <broonie@...nel.org>, linux-next@...r.kernel.org,
	linux-kernel@...r.kernel.org, nicolas.pitre@...aro.org,
	Russell King <rmk+kernel@....linux.org.uk>,
	Tejun Heo <tj@...nel.org>,
	Kyungmin Park <kyungmin.park@...sung.com>
Subject: Re: linux-next: Tree for Sep 1

Christoph,

On Tue, Sep 02, 2014 at 10:00:07AM -0500, Christoph Lameter wrote:
> On Tue, 2 Sep 2014, Christoph Lameter wrote:
> 
> > Oww.. This is double indirection deal there. A percpu offset pointing to
> > a pointer?
> >
> > Generally the following is true (definition from
> > include/asm-generic/percpu.h that is used for ARM for raw_cpu_read):
> >
> > #define raw_cpu_read_4(pcp)             (*raw_cpu_ptr(&(pcp)))
> 
> I think what the issue is that we dropped the fetch of the percpu offset
> in the patch. Instead we are using the address of the variable that
> contains the offset. Does this patch fix it?
> 
> 
> Subject: irqchip: Properly fetch the per cpu offset
> 
> The raw_cpu_read() conversion dropped the fetch of the offset
> from base->percpu_base in gic_get_percpu_base.
> 
> Signed-off-by: Christoph Lameter <cl@...ux.com>

Acked-by: Jason Cooper <jason@...edaemon.net>

thx,

Jason.
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