linux-kernel - Re: [PATCHv8 RFC] pwm: Add Freescale FTM PWM driver support

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Message-ID: <20140103230826.GB13489@core.coreip.homeip.net>
Date:	Fri, 3 Jan 2014 15:08:26 -0800
From:	Dmitry Torokhov <dmitry.torokhov@...il.com>
To:	"Li.Xiubo@...escale.com" <Li.Xiubo@...escale.com>
Cc:	"thierry.reding@...il.com" <thierry.reding@...il.com>,
	"bpringlemeir@...ps.com" <bpringlemeir@...ps.com>,
	"linux-pwm@...r.kernel.org" <linux-pwm@...r.kernel.org>,
	"grant.likely@...aro.org" <grant.likely@...aro.org>,
	"rob.herring@...xeda.com" <rob.herring@...xeda.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Huan Wang <Huan.Wang@...escale.com>,
	Jingchang Lu <jingchang.lu@...escale.com>
Subject: Re: [PATCHv8 RFC] pwm: Add Freescale FTM PWM driver support

On Fri, Jan 03, 2014 at 09:16:06AM +0000, Li.Xiubo@...escale.com wrote:
> Hi Dmitry,
> 
> > Subject: Re: [PATCHv8 RFC] pwm: Add Freescale FTM PWM driver support
> > 
> > Hi Xiubo,
> > 
> > On Fri, Jan 03, 2014 at 01:24:21PM +0800, Xiubo Li wrote:
> > > +
> > > +static inline int fsl_pwm_calculate_default_ps(struct fsl_pwm_chip *fpc,
> > > +					       enum fsl_pwm_clk index)
> > > +{
> > 
> > Why do you declare this (and other module-local) function as inline?
> > It is usually better let compiler decide if given function should be
> > inlined or not.
> > 
> 
> Could the compiler know when the given function should be inlined by
> not declare it?

Yes.

> And when will be inlined ?

When it makes sense to do so from compiler's point of view: i.e. it is
smallish or with single call site and there are enough registers, etc,
etc.

Thanks.

-- 
Dmitry
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