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From: Joe Perches <joe@perches.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Whitcroft <apw@shadowen.org>,
	LKML <linux-kernel@vger.kernel.org>,
	Jacob Pan <jacob.jun.pan@linux.intel.com>
Subject: Re: [PATCH] checkpatch: Warn on comparisons to true and false
Date: Wed, 10 Apr 2013 18:07:17 -0700
Message-ID: <1365642437.2036.5.camel@joe-AO722> (raw)
In-Reply-To: <20130410155751.7ecc6738d616fb8771991ce1@linux-foundation.org>

On Wed, 2013-04-10 at 15:57 -0700, Andrew Morton wrote:
> On Tue, 09 Apr 2013 20:17:14 -0700 Joe Perches <joe@perches.com> wrote:
> > Comparisons of A to true and false are better written
> > as A and !A.
> > Bleat a message on use.
> hm.  I'm counting around 1,100 instances of "== true" and "== false".

And about all of them in are staging, where I think they
really should be fixed.

$ find . -maxdepth 2 -type d \
   while read file ; do \
      echo "$(git grep -E '(==|\!=)\s*(true|false)' $file | wc -l)  $file"; \
  done | sort -rn | head -10
1375 .
1298 ./drivers
1055 ./drivers/staging
63 ./drivers/net
59 ./drivers/gpu
24 ./net
20 ./drivers/media
17 ./net/nfc
13 ./fs
11 ./drivers/usb

> That's a lot of people to shout at.

Not really.

>  Is it really worthwhile? 

I think so.



  reply index

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-04-10  3:17 Joe Perches
2013-04-10  9:33 ` Andy Whitcroft
2013-04-10 11:27   ` Joe Perches
2013-04-10 12:41     ` Andy Whitcroft
2013-04-10 22:57 ` Andrew Morton
2013-04-11  1:07   ` Joe Perches [this message]
2013-04-11  2:14   ` Dave Jones
2013-04-11  3:47     ` Joe Perches
2013-04-11  8:19     ` Dan Carpenter
2013-04-11  8:29       ` Joe Perches
2013-04-11 11:56     ` Bjørn Mork
2013-04-11 14:25       ` Joe Perches

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