linux-kernel - Re: [PATCH net-next 1/5] misdn: avoid -Wempty-body warning

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Message-ID: <CAK8P3a3WZmBB=bxNc=taaDwBksLOPVPzhXPAFJ3QCG+eA+Xxww@mail.gmail.com>
Date:   Mon, 22 Mar 2021 12:24:20 +0100
From:   Arnd Bergmann <arnd@...nel.org>
To:     Leon Romanovsky <leon@...nel.org>
Cc:     Networking <netdev@...r.kernel.org>,
        Karsten Keil <isdn@...ux-pingi.de>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH net-next 1/5] misdn: avoid -Wempty-body warning

On Mon, Mar 22, 2021 at 11:55 AM Leon Romanovsky <leon@...nel.org> wrote:
> On Mon, Mar 22, 2021 at 11:43:31AM +0100, Arnd Bergmann wrote:
> > From: Arnd Bergmann <arnd@...db.de>
> >
> > gcc warns about a pointless condition:
> >
> > drivers/isdn/hardware/mISDN/hfcmulti.c: In function 'hfcmulti_interrupt':
> > drivers/isdn/hardware/mISDN/hfcmulti.c:2752:17: error: suggest braces around empty body in an 'if' statement [-Werror=empty-body]
> >  2752 |                 ; /* external IRQ */
> >
> > Change this as suggested by gcc, which also fits the style of the
> > other conditions in this function.
> >
> > Signed-off-by: Arnd Bergmann <arnd@...db.de>
> > ---
> >  drivers/isdn/hardware/mISDN/hfcmulti.c | 5 +++--
> >  1 file changed, 3 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/isdn/hardware/mISDN/hfcmulti.c b/drivers/isdn/hardware/mISDN/hfcmulti.c
> > index 7013a3f08429..8ab0fde758d2 100644
> > --- a/drivers/isdn/hardware/mISDN/hfcmulti.c
> > +++ b/drivers/isdn/hardware/mISDN/hfcmulti.c
> > @@ -2748,8 +2748,9 @@ hfcmulti_interrupt(int intno, void *dev_id)
> >               if (hc->ctype != HFC_TYPE_E1)
> >                       ph_state_irq(hc, r_irq_statech);
> >       }
> > -     if (status & V_EXT_IRQSTA)
> > -             ; /* external IRQ */
> > +     if (status & V_EXT_IRQSTA) {
> > +             /* external IRQ */
> > +     }
>
> Any reason do not delete this hunk?

I don't care either way, I only kept it because it was apparently left there
on purpose by the original author, as seen by the comment.

        Arnd