linux-kernel - Re: [PATCH 03/32 v2] dmaengine: ste_dma40: Use the BIT macro to replace ugly '(1 << x)'s

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Date:	Wed, 24 Apr 2013 16:08:01 +0100
From:	Lee Jones <lee.jones@...aro.org>
To:	Linus Walleij <linus.walleij@...aro.org>
Cc:	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Arnd Bergmann <arnd@...db.de>,
	Linus WALLEIJ <linus.walleij@...ricsson.com>,
	Vinod Koul <vinod.koul@...el.com>, Dan Williams <djbw@...com>,
	Per Forlin <per.forlin@...ricsson.com>,
	Rabin Vincent <rabin@....in>
Subject: Re: [PATCH 03/32 v2] dmaengine: ste_dma40: Use the BIT macro to
 replace ugly '(1 << x)'s

On Wed, 24 Apr 2013, Linus Walleij wrote:

> On Thu, Apr 18, 2013 at 2:16 PM, Lee Jones <lee.jones@...aro.org> wrote:
> 
> > The aim is to make the code that little more readable.
> >
> > Cc: Vinod Koul <vinod.koul@...el.com>
> > Cc: Dan Williams <djbw@...com>
> > Cc: Per Forlin <per.forlin@...ricsson.com>
> > Cc: Rabin Vincent <rabin@....in>
> > Acked-by: Arnd Bergmann <arnd@...db.de>
> > Signed-off-by: Lee Jones <lee.jones@...aro.org>
> >
> > diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c
> > index 3b83dee..ddf5ff1 100644
> > --- a/drivers/dma/ste_dma40.c
> > +++ b/drivers/dma/ste_dma40.c
> > @@ -49,9 +49,9 @@
> >  #define MAX_LCLA_ALLOC_ATTEMPTS 256
> >
> >  /* Bit markings for allocation map */
> > -#define D40_ALLOC_FREE         (1 << 31)
> > -#define D40_ALLOC_PHY          (1 << 30)
> > -#define D40_ALLOC_LOG_FREE     0
> > +#define D40_ALLOC_FREE         BIT(31)
> > +#define D40_ALLOC_PHY          BIT(30)
> > +#define D40_ALLOC_LOG_FREE     BIT(0)
> 
> No. 0 != BIT(0)
> 
> Please fix this...

Good spot.

I've already fixed this though.

I'll send it as a v3 now.

-- 
Lee Jones
Linaro ST-Ericsson Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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