linux-kernel - Re: [PATCH v4 05/13] pm: at91: move the copying the sram function to the sram initializationi phase

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Date:	Fri, 30 Jan 2015 10:16:45 +0000
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	"Yang, Wenyou" <Wenyou.Yang@...el.com>
Cc:	"Ferre, Nicolas" <Nicolas.FERRE@...el.com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"alexandre.belloni@...e-electrons.com" 
	<alexandre.belloni@...e-electrons.com>,
	"sylvain.rochet@...secur.com" <sylvain.rochet@...secur.com>,
	"peda@...ntia.se" <peda@...ntia.se>,
	"sergei.shtylyov@...entembedded.com" 
	<sergei.shtylyov@...entembedded.com>,
	"linux@...im.org.za" <linux@...im.org.za>
Subject: Re: [PATCH v4 05/13] pm: at91: move the copying the sram function to
 the sram initializationi phase

On Fri, Jan 30, 2015 at 06:59:58AM +0000, Yang, Wenyou wrote:
> Hi Russell,
> 
> Thank you for your review.
> 
> > -----Original Message-----
> > From: Russell King - ARM Linux [mailto:linux@....linux.org.uk]
> > 
> > On Wed, Jan 28, 2015 at 09:43:16AM +0800, Wenyou Yang wrote:
> > > @@ -272,6 +268,9 @@ static void __init at91_pm_sram_init(void)
> > >  	sram_pbase = gen_pool_virt_to_phys(sram_pool, sram_base);
> > >  	slow_clock = __arm_ioremap_exec(sram_pbase, at91_slow_clock_sz,
> > > false);
> > >
> > > +	/* Copy the slow_clock handler to SRAM */
> > > +	memcpy(slow_clock, at91_slow_clock, at91_slow_clock_sz);
> > > +
> > 
> > Why is this code not using the fncpy() support for copying functions.
> At first, used the fncpy(), but it work not well on the some chip. I
> will check it again.

Please report on this; why does it "work not well" ?

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