netdev - Re: [PATCH] checkpatch: Make --strict a default for files in drivers/net and net/

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Fri, 09 May 2014 13:56:15 -0700
From:	Joe Perches <joe@...ches.com>
To:	Kim Phillips <kim.phillips@...escale.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
	Andy Whitcroft <apw@...onical.com>
Subject: Re: [PATCH] checkpatch: Make --strict a default for files in
 drivers/net and net/

On Fri, 2014-05-09 at 15:37 -0500, Kim Phillips wrote:
> On Wed, 7 May 2014 11:13:26 -0700
> Joe Perches <joe@...ches.com> wrote:
> 
> > Networking files are generally more strictly conformant to
> > linux-kernel style
> 
> checkpatch disagrees :) :
> 
> {drivers/}net/ :            ~10.8 CHECKs per .[hc] file
> everything else:            ~10   CHECKs per .[hc] file
> no net, no drivers/staging:  ~8.6 CHECKs per .[hc] file
> 
> (see [1] below for details).
> 
> > +		if ($found_file) {
> > +			if ($realfile =~ m@^(drivers/net/|net/)@) {
> 
> this isn't easily extensible/scalable to other subsystems, or
> say something like "all Freescale drivers."  Having it configurable
> in .checkpatch.conf might be a better solution, but I don't believe
> networking should be the only subsystem that can take advantage of
> the extra checkpatch CHECKs.

staging probably could too.

> Can we enable --strict universally in the Linux kernel, maybe like
> so:?

I don't think that's appropriate (yet?).

Anyone that wants --strict checking can either add
it on the command line or create a .checkpatch.conf
file with --strict in it.

> diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
[]
> @@ -228,6 +228,7 @@ if ($tree) {
>                 print "Must be run from the top-level dir. of a kernel tree\n";
>                 exit(2);
>         }
> +       $check = 1;
>  }
>  
>  my $emitted_corrupt = 0;
> 
> fwiw, --strict has been set unconditionally in u-boot's
> .checkpatch.conf for over a year now, and has significantly reduced
> patch revision churn for simple mistakes like parenthesis alignment,
> spaces after a cast and/or before a semicolon...

Good to know.

> [1] the following were run on kernel v3.15-rc4-260-g38583f0:
> 
> for i in `git ls-files | grep -v '^net/' | grep -v '^drivers/net/' | grep \\\.[ch]$`; do scripts/checkpatch.pl --strict -f $i; done | grep ^CHECK: | wc -l
> 328329
> git ls-files | grep -v '^net/' | grep -v '^drivers/net/' | grep \\\.[ch]$ | wc -l
> 32754
> => 32754 / 328329 ~= 10 CHECKs per file.[ch] for everything outside of {drivers/}net/.
> 
> for i in `git ls-files net/ drivers/net/ | grep \\\.[ch]$`; do scripts/checkpatch.pl --strict -f $i; done | grep ^CHECK: | wc -l
> 40431
> git ls-files net/ drivers/net/ | grep \\\.[ch]$ | wc -l
> 3742
> => {drivers/}net/: 40431 / 3742 = 10.8 CHECKs per file.[hc]
> 
> for i in `git ls-files | grep -v '^net/' | grep -v '^drivers/net/' | grep -v '^drivers/staging/' | grep \\\.[ch]$`; do scripts/checkpatch.pl --strict -f $i; done | grep ^CHECK: | wc -l
> 262005
> git ls-files | grep -v '^net/' | grep -v '^drivers/net/' | grep -v '^drivers/staging/' | grep \\\.[ch]$ | wc -l
> 30479
> => no net, no staging:  262005 / 30479  =  8.6 CHECKs per file.[hc]

Try that with a per-file "wc -l" for checks per LOC


--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html