linux-kernel - Re: [PATCH v2] hp100: remove set but not used variable val

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Date:   Tue, 05 Nov 2019 09:13:31 -0800
From:   Joe Perches <joe@...ches.com>
To:     Greg KH <gregkh@...uxfoundation.org>,
        Chen Wandun <chenwandun@...wei.com>
Cc:     linux-kernel@...r.kernel.org, devel@...verdev.osuosl.org,
        perex@...ex.cz, kstewart@...uxfoundation.org, allison@...utok.net,
        tglx@...utronix.de
Subject: Re: [PATCH v2] hp100: remove set but not used variable val

On Tue, 2019-11-05 at 16:50 +0100, Greg KH wrote:
> On Tue, Nov 05, 2019 at 10:36:59PM +0800, Chen Wandun wrote:
> > From: Chenwandun <chenwandun@...wei.com>
> > 
> > Fixes gcc '-Wunused-but-set-variable' warning:
> > 
> > drivers/staging/hp/hp100.c: In function hp100_start_xmit:
> > drivers/staging/hp/hp100.c:1629:10: warning: variable val set but not used [-Wunused-but-set-variable]
> > 
> > Signed-off-by: Chenwandun <chenwandun@...wei.com>
> 
> I need a "full" name here, like the one on your email "From:" line.

You also need the submitter to run checkpatch on the patch
and not just the file.

WARNING: drivers/staging/hp/hp100.c is marked as 'obsolete' in the MAINTAINERS hierarchy.  No unnecessary modifications please.

WARNING: drivers/staging/hp/hp100.c is marked as 'obsolete' in the MAINTAINERS hierarchy.  No unnecessary modifications please.
total: 0 errors, 2 warnings, 0 checks, 18 lines checked

> > diff --git a/drivers/staging/hp/hp100.c b/drivers/staging/hp/hp100.c
[]
> > @@ -1626,7 +1626,9 @@ static netdev_tx_t hp100_start_xmit(struct sk_buff *skb,
> >  	unsigned long flags;
> >  	int i, ok_flag;
> >  	int ioaddr = dev->base_addr;
> > +#ifdef HP100_DEBUG_TX
> >  	u_short val;
> > +#endif
> 
> #ifdefs are not ok in .c code, sorry.
> 
> >  	struct hp100_private *lp = netdev_priv(dev);
> >  
> >  #ifdef HP100_DEBUG_B
> > @@ -1695,7 +1697,9 @@ static netdev_tx_t hp100_start_xmit(struct sk_buff *skb,
> >  
> >  	spin_lock_irqsave(&lp->lock, flags);
> >  	hp100_ints_off();
> > +#ifdef HP100_DEBUG_TX
> >  	val = hp100_inw(IRQ_STATUS);
> 
> Are you sure that this doesn't actually change the hardware in some way?

If anyone still _has_ the hardware, please let me know.

I have the only VG test equipment I know of in a box
somewhere in my basement and it's yours for the asking
and the postage.

It hasn't been powered on in 25 years, no guarantees...