On Tue, May 19, 2020 at 09:07:55AM -0700, Linus Torvalds wrote:
> On Tue, May 19, 2020 at 6:45 AM Christoph Hellwig <hch@xxxxxx> wrote:
> >
> > + switch (fmt_ptype) {
> > + case 's':
> > +#ifdef CONFIG_ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE
> > + strncpy_from_unsafe(buf, unsafe_ptr, bufsz);
> > + break;
> > +#endif
> > + case 'k':
> > + strncpy_from_kernel_nofault(buf, unsafe_ptr, bufsz);
> > + break;
>
> That 's' case needs a "fallthrough;" for the overlapping case,
> methinks. Otherwise you'll get warnings.
I don't think we need it as the case of
case 'a':
case 'b':
do_stuff();
break;
has always been fine even with the fallthough warnings. And the
rest of the stuff gets removed by cpp..
