linux-kernel - Re: [Lkcamp] [PATCH 3/4] kbuild: Removes unnecessary shadowed local variable and optimize testing.

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Message-ID: <CAK7LNAQ58ZMjFmyNDNmtE+KaQE_LAqo1aRQ-4WpnUsgJSjNT6g@mail.gmail.com>
Date:   Fri, 19 Oct 2018 11:44:06 +0900
From:   Masahiro Yamada <yamada.masahiro@...ionext.com>
To:     Leonardo Brás <leobras.c@...il.com>
Cc:     helen@...keco.de, lkcamp@...ts.libreplanetbr.org,
        X86 ML <x86@...nel.org>,
        Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        Matthew Wilcox <willy6545@...il.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Andy Lutomirski <luto@...nel.org>,
        "H. Peter Anvin" <hpa@...or.com>,
        Michal Marek <michal.lkml@...kovi.net>,
        Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [Lkcamp] [PATCH 3/4] kbuild: Removes unnecessary shadowed local
 variable and optimize testing.

On Thu, Oct 18, 2018 at 11:04 AM Leonardo Bras <leobras.c@...il.com> wrote:
>
> Hello Helen,
>
> On Wed, Oct 17, 2018 at 12:06 AM Helen Koike <helen@...keco.de> wrote:
> >
> > Hi Leonardo,
> >
> > On 10/16/18 9:09 PM, Leonardo Brás wrote:
> > >     Removes an unnecessary shadowed local variable (start).
> > >     Optimize test of isdigit:
> > >     - If isalpha returns true, isdigit will return false, so no need to test.
> >
> > This patch does two different things, it should be in two separated patches.
> Sure, no problem.
>
> >
> > >
> > > Signed-off-by: Leonardo Brás <leobras.c@...il.com>
> > > ---
> > >  scripts/asn1_compiler.c | 7 +++----
> > >  1 file changed, 3 insertions(+), 4 deletions(-)
> > >
> > > diff --git a/scripts/asn1_compiler.c b/scripts/asn1_compiler.c
> > > index c146020fc783..08bb6e5fd6ad 100644
> > > --- a/scripts/asn1_compiler.c
> > > +++ b/scripts/asn1_compiler.c
> > > @@ -413,7 +413,7 @@ static void tokenise(char *buffer, char *end)
> > >
> > >                       /* Handle string tokens */
> > >                       if (isalpha(*p)) {
> > > -                             const char **dir, *start = p;
> > > +                             const char **dir;
> > >
> > >                               /* Can be a directive, type name or element
> > >                                * name.  Find the end of the name.
> > > @@ -454,10 +454,9 @@ static void tokenise(char *buffer, char *end)
> > >
> > >                               tokens[tix++].token_type = TOKEN_TYPE_NAME;
> > >                               continue;
> > > -                     }
> > > +                     } else if (isdigit(*p)) {
> > > +                             /* Handle numbers */
> >
> > Actually you can't do that, p is being altered in the first if statement.
>
> Yeah, you are right. I will remove this logic for v2.


I drop v1 from my tree.

Please send v2.


> >
> > >
> > > -                     /* Handle numbers */
> > > -                     if (isdigit(*p)) {
> > >                               /* Find the end of the number */
> > >                               q = p + 1;
> > >                               while (q < nl && (isdigit(*q)))
> > >
> >
> > Regards
> > Helen
>
> Thanks!
>
> Leonardo Brás



-- 
Best Regards
Masahiro Yamada