linux-kernel - Re: [PATCH 23/43] tools lib: Adopt skip

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Date:   Tue, 2 Jul 2019 15:54:32 +0200
From:   Jiri Olsa <jolsa@...hat.com>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     Ingo Molnar <mingo@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Clark Williams <williams@...hat.com>,
        linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org,
        Arnaldo Carvalho de Melo <acme@...hat.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        André Goddard Rosa <andre.goddard@...il.com>
Subject: Re: [PATCH 23/43] tools lib: Adopt skip_spaces() from the kernel
 sources

On Tue, Jul 02, 2019 at 10:48:15AM -0300, Arnaldo Carvalho de Melo wrote:
> Em Tue, Jul 02, 2019 at 10:46:03AM -0300, Arnaldo Carvalho de Melo escreveu:
> > Em Tue, Jul 02, 2019 at 02:12:40PM +0200, Jiri Olsa escreveu:
> > > On Mon, Jul 01, 2019 at 11:25:56PM -0300, Arnaldo Carvalho de Melo wrote:
> > > > From: Arnaldo Carvalho de Melo <acme@...hat.com>
> > > > 
> > > > Same implementation, will be used to replace ad-hoc equivalent code in
> > > > tools/.
> > > > 
> > > > Cc: Adrian Hunter <adrian.hunter@...el.com>
> > > > Cc: André Goddard Rosa <andre.goddard@...il.com>
> > > > Cc: Jiri Olsa <jolsa@...nel.org>
> > > > Cc: Namhyung Kim <namhyung@...nel.org>
> > > > Link: https://lkml.kernel.org/n/tip-dig691cg9ripvoiprpidthw7@git.kernel.org
> > > > Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
> > > > ---
> > > >  tools/include/linux/string.h |  4 +++-
> > > >  tools/lib/string.c           | 14 ++++++++++++++
> > > >  2 files changed, 17 insertions(+), 1 deletion(-)
> > > > 
> > > > diff --git a/tools/include/linux/string.h b/tools/include/linux/string.h
> > > > index 6c3e2cc274c5..cee239350a6b 100644
> > > > --- a/tools/include/linux/string.h
> > > > +++ b/tools/include/linux/string.h
> > > > @@ -29,4 +29,6 @@ static inline bool strstarts(const char *str, const char *prefix)
> > > >  	return strncmp(str, prefix, strlen(prefix)) == 0;
> > > >  }
> > > >  
> > > > -#endif /* _LINUX_STRING_H_ */
> > > > +extern char * __must_check skip_spaces(const char *);
> > > > +
> > > > +#endif /* _TOOLS_LINUX_STRING_H_ */
> > > > diff --git a/tools/lib/string.c b/tools/lib/string.c
> > > > index 93b3d4b6feac..50d400822bb3 100644
> > > > --- a/tools/lib/string.c
> > > > +++ b/tools/lib/string.c
> > > > @@ -17,6 +17,7 @@
> > > >  #include <string.h>
> > > >  #include <errno.h>
> > > >  #include <linux/string.h>
> > > > +#include <linux/ctype.h>
> > > >  #include <linux/compiler.h>
> > > >  
> > > >  /**
> > > > @@ -106,3 +107,16 @@ size_t __weak strlcpy(char *dest, const char *src, size_t size)
> > > >  	}
> > > >  	return ret;
> > > >  }
> > > > +
> > > > +/**
> > > > + * skip_spaces - Removes leading whitespace from @str.
> > > > + * @str: The string to be stripped.
> > > > + *
> > > > + * Returns a pointer to the first non-whitespace character in @str.
> > > > + */
> > > > +char *skip_spaces(const char *str)
> > > > +{
> > > > +	while (isspace(*str))
> > > > +		++str;
> > > > +	return (char *)str;
> > > > +}
> > > > -- 
> > > > 2.20.1
> > > > 
> > > 
> > > this breaks objtool build, because it adds _ctype dependency via isspace call
> > > patch below fixes it for me
> > 
> > Thanks for  spotting this, I'll have it in my next pull request.
> 
> I'm adding a Signed-off-by: you, ok?

sure, I did not post full patch, because I thought you might thought
of some other solution

thanks,
jirka