linux-kernel - Re: [PATCH 1/3] staging: lustre/lustre/lov: Remove unneeded 'if' statement in lov_request.c/lov_check

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Date:	Sun, 20 Jul 2014 13:03:04 +0200
From:	Riccardo Lucchese <riccardo.lucchese@...il.com>
To:	Joe Perches <joe@...ches.com>
Cc:	gregkh@...uxfoundation.org, oleg.drokin@...el.com,
	josh@...htriplett.org, devel@...verdev.osuosl.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/3] staging: lustre/lustre/lov: Remove unneeded 'if'
 statement in lov_request.c/lov_check_set()

On Sat, Jul 19, 2014 at 12:59:22PM -0700, Joe Perches wrote:
> On Sat, 2014-07-19 at 21:34 +0200, Riccardo Lucchese wrote:
> > It is silly to go through an if statement to set a single boolean
> > value in function of a single boolean expression. In the function
> > lov_check_set, assign the return value directly.
> []
> > diff --git a/drivers/staging/lustre/lustre/lov/lov_request.c b/drivers/staging/lustre/lustre/lov/lov_request.c
> []
> > @@ -140,14 +140,13 @@ void lov_set_add_req(struct lov_request *req, struct lov_request_set *set)
> >  
> >  static int lov_check_set(struct lov_obd *lov, int idx)
> >  {
> > -	int rc = 0;
> > +	int rc;
> >  	mutex_lock(&lov->lov_lock);
> >  
> > -	if (lov->lov_tgts[idx] == NULL ||
> > -	    lov->lov_tgts[idx]->ltd_active ||
> > -	    (lov->lov_tgts[idx]->ltd_exp != NULL &&
> > -	     class_exp2cliimp(lov->lov_tgts[idx]->ltd_exp)->imp_connect_tried))
> > -		rc = 1;
> > +	rc = lov->lov_tgts[idx] == NULL ||
> > +		lov->lov_tgts[idx]->ltd_active ||
> > +		(lov->lov_tgts[idx]->ltd_exp != NULL &&
> > +		 class_exp2cliimp(lov->lov_tgts[idx]->ltd_exp)->imp_connect_tried);
> >  
> >  	mutex_unlock(&lov->lov_lock);
> >  	return rc;
> 
> Maybe consider using a temporary for lov->lov_tgtx[idx] like:
[...]

Indeed, it is nicer this way.

Thanks,
Riccardo
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