Subject: Re: [PATCH 5/5] ISDN-Gigaset: Enclose two expressions for the sizeof operator by parentheses

From: Dan Carpenter <[email-masked]>
Date: Tue, 27 Sep 2016 10:25:36 +0300

On Tue, Sep 27, 2016 at 10:08:37AM +0300, Dan Carpenter wrote:
> On Mon, Sep 26, 2016 at 08:38:14PM +0300, Sergei Shtylyov wrote:
> > >@@ -53,7 +53,7 @@ void gigaset_dbg_buffer(enum debuglevel level, const unsigned char *msg,
> > > {
> > > 	unsigned char outbuf[80];
> > > 	unsigned char c;
> > >-	size_t space = sizeof outbuf - 1;
> > >+	size_t space = sizeof(outbuf - 1);
> > 
> >    What?! Does that compile?
> > 
> > [...]
> 
> It prints a Smatch warning.  Smatch ignores these if they happen inside
> a macro where you pass a pointer and it takes the sizeof() the argument.

Reading that again, I realize it's not clear.  Smatch ignores these any
time they happen in a macro whether they're valid or not.  (Many times
they are valid).

regards,
dan carpenter