linux-kernel - Re: [RESEND PATCH 1/1] headers_install.sh: Support _

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Message-ID: <20190222113512.abpmbptqsnroibsi@paasikivi.fi.intel.com>
Date:   Fri, 22 Feb 2019 13:35:13 +0200
From:   Sakari Ailus <sakari.ailus@...ux.intel.com>
To:     Masahiro Yamada <yamada.masahiro@...ionext.com>
Cc:     Michael Forney <forney@...gle.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Jonathan Corbet <corbet@....net>
Subject: Re: [RESEND PATCH 1/1] headers_install.sh: Support __aligned(x) for
 uAPI headers

Hi Yamada-san,

On Fri, Feb 22, 2019 at 01:36:03PM +0900, Masahiro Yamada wrote:
> On Thu, Feb 21, 2019 at 10:29 PM Sakari Ailus
> <sakari.ailus@...ux.intel.com> wrote:
> >
> > The headers-install.sh already supports __packed conversion to
> > __attribute__((packed)) for uAPI headers but it does not support similar
> > __aligned(x) conversion.
> >
> > Add support for __aligned(x).
> 
> 
> I am not a big fan of sed scripting in headers_install.sh
> 
> Is it a problem to write __attribute__((aligned(x)) in UAPI headers?

Not really as such. __packed is supported in uAPI headers so I thought
__aligned should probably be as well. One factor here would seem to be that
__packed is way more common than __aligned is.

FWIW, a corresponding change has been done to scripts/kernel-doc; see
commit 3d9bfb19bd705f503ac7afc2776d5d56dab88858 so kerneldoc does correctly
handle that now.

Cc Jonathan.

> 
> 
> 
> > Signed-off-by: Sakari Ailus <sakari.ailus@...ux.intel.com>
> > ---
> >  scripts/headers_install.sh | 1 +
> >  1 file changed, 1 insertion(+)
> >
> > diff --git a/scripts/headers_install.sh b/scripts/headers_install.sh
> > index 593f8879c641..9ed490f33a3a 100755
> > --- a/scripts/headers_install.sh
> > +++ b/scripts/headers_install.sh
> > @@ -36,6 +36,7 @@ do
> >                 -e 's/__attribute_const__([[:space:]]|$)/\1/g' \
> >                 -e 's@...nclude <linux/compiler(|_types).h>@@' \
> >                 -e 's/(^|[^a-zA-Z0-9])__packed([^a-zA-Z0-9_]|$)/\1__attribute__((packed))\2/g' \
> > +               -e 's/(^|[^a-zA-Z0-9])__aligned(\([0-9 ]*\))([^a-zA-Z0-9_]|$)/\1__attribute__((aligned\2))\3/g' \
> >                 -e 's/(^|[[:space:](])(inline|asm|volatile)([[:space:](]|$)/\1__\2__\3/g' \
> >                 -e 's@#(ifndef|define|endif[[:space:]]*/[*])[[:space:]]*_UAPI@#\1 @' \
> >                 "$SRCDIR/$i" > "$OUTDIR/$FILE.sed" || exit 1
> > --
> > 2.11.0
> >
> 
> 
> -- 
> Best Regards
> Masahiro Yamada

-- 
Sakari Ailus
sakari.ailus@...ux.intel.com