linux-kernel - Re: [RFC][PATCH v2 7/7] checkpatch: add pF/pf deprecation warning

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Date:   Wed, 20 Sep 2017 19:28:33 -0700
From:   Joe Perches <joe@...ches.com>
To:     Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>
Cc:     Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
        Tony Luck <tony.luck@...el.com>,
        Fenghua Yu <fenghua.yu@...el.com>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        James Bottomley <jejb@...isc-linux.org>,
        Helge Deller <deller@....de>, Petr Mladek <pmladek@...e.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Jessica Yu <jeyu@...nel.org>,
        Alexei Starovoitov <ast@...nel.org>,
        linux-ia64@...r.kernel.org, linux-parisc@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
        Andy Whitcroft <apw@...onical.com>
Subject: Re: [RFC][PATCH v2 7/7] checkpatch: add pF/pf deprecation warning

On Thu, 2017-09-21 at 09:27 +0900, Sergey Senozhatsky wrote:
> On (09/20/17 10:38), Joe Perches wrote:
> > On Thu, 2017-09-21 at 01:29 +0900, Sergey Senozhatsky wrote:
> > > We deprecated '%pF/%pf' printk specifiers, since '%pS/%ps' is now smart
> > > enough to handle function pointer dereference on platforms where such
> > > dereference is required.
> > > 
> > > checkpatch warning example:
> > > 
> > > WARNING: Use '%pS/%ps' instead. This pointer extension was deprecated: '%pF'
> > 
> > If this series is accepted,  I think this message
> > is unclear and would prefer something like:
> 
> sure, can tweak the patch.
> 
> [..]
> >  			if ($bad_extension ne "") {
> >  				my $stat_real = raw_line($linenr, 0);
> > +				my $ext_type = "Invalid";
> > +				my $use = "";
> >  				for (my $count = $linenr + 1; $count <= $lc; $count++) {
> >  					$stat_real = $stat_real . "\n" . raw_line($count, 0);
> >  				}
> > +				if ($bad_extension =~ /p[Ff]/i) {
> 
> 						I think /i is not necessary here

You are right, it's not.