linux-kernel - Re: [PATCH 3/7] Input: libps2 - use BIT() for bitmask constants

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Date:   Fri, 19 Jan 2018 14:39:12 -0800
From:   Dmitry Torokhov <dmitry.torokhov@...il.com>
To:     Randy Dunlap <rdunlap@...radead.org>
Cc:     Benjamin Tissoires <benjamin.tissoires@...hat.com>,
        Hans de Goede <hdegoede@...hat.com>,
        Lyude Paul <lyude@...hat.com>, linux-input@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/7] Input: libps2 - use BIT() for bitmask constants

On Fri, Jan 19, 2018 at 02:26:20PM -0800, Randy Dunlap wrote:
> On 01/19/2018 11:41 AM, Dmitry Torokhov wrote:
> > Let's explicitly document bit numbers with BIT() macro.
> > 
> > Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
> 
> Makes sense, but something should
> #include <linux/bitops.h>

Indeed, I'll add it, thanks.

> 
> per Documentation/process/submit-checklist.rst Rule #1:
> 1) If you use a facility then #include the file that defines/declares
>    that facility.  Don't depend on other header files pulling in ones
>    that you use.
> 
> 
> > ---
> >  include/linux/libps2.h | 10 +++++-----
> >  1 file changed, 5 insertions(+), 5 deletions(-)
> > 
> > diff --git a/include/linux/libps2.h b/include/linux/libps2.h
> > index 365c50b097ded..649295a5ff47d 100644
> > --- a/include/linux/libps2.h
> > +++ b/include/linux/libps2.h
> > @@ -20,11 +20,11 @@
> >  #define PS2_RET_NAK		0xfe
> >  #define PS2_RET_ERR		0xfc
> >  
> > -#define PS2_FLAG_ACK		1	/* Waiting for ACK/NAK */
> > -#define PS2_FLAG_CMD		2	/* Waiting for command to finish */
> > -#define PS2_FLAG_CMD1		4	/* Waiting for the first byte of command response */
> > -#define PS2_FLAG_WAITID		8	/* Command execiting is GET ID */
> > -#define PS2_FLAG_NAK		16	/* Last transmission was NAKed */
> > +#define PS2_FLAG_ACK		BIT(0)	/* Waiting for ACK/NAK */
> > +#define PS2_FLAG_CMD		BIT(1)	/* Waiting for a command to finish */
> > +#define PS2_FLAG_CMD1		BIT(2)	/* Waiting for the first byte of command response */
> > +#define PS2_FLAG_WAITID		BIT(3)	/* Command executing is GET ID */
> > +#define PS2_FLAG_NAK		BIT(4)	/* Last transmission was NAKed */
> >  
> >  struct ps2dev {
> >  	struct serio *serio;
> > 
> 
> 
> -- 
> ~Randy

-- 
Dmitry