linux-kernel - Re: [PATCH 04/15] staging: rtl8723bs: put parentheses on macros with complex values in include/basic

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Message-ID: <20210326111241.GD1452@agape.jhs>
Date:   Fri, 26 Mar 2021 12:12:42 +0100
From:   Fabio Aiuto <fabioaiuto83@...il.com>
To:     Dan Carpenter <dan.carpenter@...cle.com>
Cc:     gregkh@...uxfoundation.org, linux-staging@...ts.linux.dev,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 04/15] staging: rtl8723bs: put parentheses on macros with
 complex values in include/basic_types.h

On Fri, Mar 26, 2021 at 01:04:08PM +0300, Dan Carpenter wrote:
> On Fri, Mar 26, 2021 at 10:09:11AM +0100, Fabio Aiuto wrote:
> > fix the following checkpatch warnings:
> > 
> > ERROR: Macros with complex values should be enclosed in parentheses
> > 154: FILE: drivers/staging/rtl8723bs/include/basic_types.h:154:
> > +#define SET_BITS_TO_LE_4BYTE(__pstart, __bitoffset, __bitlen, __val) \
> > --
> > ERROR: Macros with multiple statements should be enclosed in
> > a do - while loop
> > 161: FILE: drivers/staging/rtl8723bs/include/basic_types.h:161:
> > +#define SET_BITS_TO_LE_2BYTE(__pstart, __bitoffset, __bitlen, __val) \
> > --
> > ERROR: Macros with complex values should be enclosed in parentheses
> > 168: FILE: drivers/staging/rtl8723bs/include/basic_types.h:168:
> > +#define SET_BITS_TO_LE_1BYTE(__pstart, __bitoffset, __bitlen, __val) \
> > 
> > parentheses solution preferred for all fixes and made macros more
> > readables
> > 
> > Signed-off-by: Fabio Aiuto <fabioaiuto83@...il.com>
> > ---
> >  .../staging/rtl8723bs/include/basic_types.h   | 30 +++++++++++--------
> >  1 file changed, 18 insertions(+), 12 deletions(-)
> > 
> > diff --git a/drivers/staging/rtl8723bs/include/basic_types.h b/drivers/staging/rtl8723bs/include/basic_types.h
> > index 76304086107a..5054c2e3384c 100644
> > --- a/drivers/staging/rtl8723bs/include/basic_types.h
> > +++ b/drivers/staging/rtl8723bs/include/basic_types.h
> > @@ -152,24 +152,30 @@
> >  /* 		Set subfield of little-endian 4-byte value to specified value. */
> >  /*  */
> >  #define SET_BITS_TO_LE_4BYTE(__pstart, __bitoffset, __bitlen, __val) \
> > -		*((u32 *)(__pstart)) =				\
> > -		(						\
> > -		LE_BITS_CLEARED_TO_4BYTE(__pstart, __bitoffset, __bitlen) | \
> > -		((((u32)__val) & BIT_LEN_MASK_32(__bitlen)) << (__bitoffset)) \
> > +		(\
> > +			*((u32 *)(__pstart)) =				\
> > +			(						\
> > +				LE_BITS_CLEARED_TO_4BYTE(__pstart, __bitoffset, __bitlen) | \
> > +				((((u32)__val) & BIT_LEN_MASK_32(__bitlen)) << (__bitoffset)) \
> > +			)\
> >  		)
> >  
> 
> These macros are terrible and this makes it uglier.  Better to just
> ignore checkpatch until we can figure out a way to re-write this
> properly.
> 
> regards,
> dan carpenter
> 

I see, will drop the patch for now.

thanks,

fabio