linux-kernel - Re: [PATCH 2/3] checkpatch: Add error on use of attribute((weak)) or _

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Message-ID: <1413402348.7484.8.camel@perches.com>
Date:	Wed, 15 Oct 2014 12:45:48 -0700
From:	Joe Perches <joe@...ches.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Andy Whitcroft <apw@...onical.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/3] checkpatch: Add error on use of attribute((weak))
 or __weak

On Wed, 2014-10-15 at 12:42 -0700, Andrew Morton wrote:
> On Wed, 15 Oct 2014 12:32:08 -0700 Joe Perches <joe@...ches.com> wrote:
> 
> > Using weak can have unintended link defects.
> > Emit an error on its use.
> 
> Well, we don't want a warning about use of __weak in function
> definitions.  Only in declarations.

Why is that?

> > --- a/scripts/checkpatch.pl
> > +++ b/scripts/checkpatch.pl
> > @@ -4671,6 +4671,14 @@ sub process {
> >  			}
> >  		}
> >  
> > +# Check for __attribute__ weak, or __weak (may have link issues)
> > +		if ($realfile !~ m@\binclude/uapi/@ &&
> 
> And this bit maybe is checking for use in a header file, which is not
> as good as checking for a declaration but is probably good enough. 
> However the "uapi" bit is confusing.
> 
> Can we have a better changelog please?

Suggestions?

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