On Mon, 2013-04-15 at 07:58 +0200, Heiko Carstens wrote:
> On Sun, Apr 14, 2013 at 10:53:27PM -0700, Joe Perches wrote:
> > On Mon, 2013-04-15 at 07:48 +0200, Heiko Carstens wrote:
> > > On Sat, Apr 13, 2013 at 11:06:14PM -0700, Joe Perches wrote:
> > > > Commit ea81531d ("s390/uaccess: fix page table walk")
> > > > added this code. It looks like it should have break;
> > > > for each case.
> > > no, the fallthrough is on purpose for each case statement.
> >
> > Hi again. It might be useful to add /* fallthrough */
> > or some other comment showing it's intentional.
>
> I might add some comment above the function, since for everybody
> *knowing* the architecture it's obvious ;) that these must be
> fallthroughs.
> How did you stuble across this?
Tony Prisk sent an patch about a duplicated set of
a variable in a switch/case without a break and I
generalized it and found this and another one in
arch/arm. (the arm one was a real defect)
This one looked like it could be intentional (or not),
but I thought I'd ask.
$ grep-2.5.4 -rP --include=*.[ch]
"\b(\w+)\s*=[^;]+;\s*(?:case\s+\w+:|default:)\s*\1\s*=" *
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