linux-kernel - Re: [PATCH] staging: nvec: fixed few coding style warnings

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Message-ID: <1971511.Ec7FdKlGRN@fb07-iapwap2>
Date:	Thu, 15 Oct 2015 10:39:02 +0200
From:	Marc Dietrich <marvin24@....de>
To:	Dan Carpenter <dan.carpenter@...cle.com>,
	gregkh@...uxfoundation.org, linux-tegra@...r.kernel.org
Cc:	Sakshi Bansal <sakshi.april5@...il.com>,
	devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] staging: nvec: fixed few coding style warnings

Am Mittwoch, 14. Oktober 2015, 21:12:36 schrieb Dan Carpenter:
> On Wed, Oct 14, 2015 at 07:38:22PM +0530, Sakshi Bansal wrote:
> > Fixed allignmnet issues and block comments usage
> 
> Split it apart by type of fix.
> 
> > @@ -617,7 +618,7 @@ static irqreturn_t nvec_interrupt(int irq, void *dev)
> > 
> >  		} else {
> >  		
> >  			nvec->rx = nvec_msg_alloc(nvec, NVEC_MSG_RX);
> >  			/* Should not happen in a normal world */
> > 
> > -			if (unlikely(nvec->rx == NULL)) {
> > +			if (!unlikely(nvec->rx)) {
> 
> This isn't right.  You intented to say:
> 
> 	if (unlikely(!nvec->rx)) {
> 
> But even better to just remove the unlikely entirely.
> 
> 	if (!nvec->rx) {

why? the "unlikely" is there to optimize a critical interrupt path.


Marc

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