linux-kernel - Re: [EXT4 set 6][PATCH 1/1]Export jbd stats through procfs

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Message-Id: <1184120502.20193.41.camel@localhost.localdomain>
Date:	Tue, 10 Jul 2007 22:21:42 -0400
From:	Mingming Cao <cmm@...ibm.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	"Cédric "Augonnet\"" 
	<cedric.augonnet@...il.com>, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-ext4@...r.kernel.org
Subject: Re: [EXT4 set 6][PATCH 1/1]Export jbd stats through procfs

On Tue, 2007-07-10 at 21:42 -0700, Andrew Morton wrote:
> On Tue, 10 Jul 2007 23:21:49 -0400 "Cédric Augonnet" <cedric.augonnet@...il.com> wrote:
> 
> > 2007/7/10, Andrew Morton <akpm@...ux-foundation.org>:
> > 
> > Hi all,
> > 
> > > > +     size = sizeof(struct transaction_stats_s);
> > > > +     s->stats = kmalloc(size, GFP_KERNEL);
> > > > +     if (s == NULL) {
> > > > +             kfree(s);
> > > > +             return -EIO;
> > >
> > > ENOMEM
> > 
> > I'm sorry if i missed some point, but i just don't see the use of such
> > a kfree here, not sure Andrew meant you should only return ENOMEM
> > instead, but why issuing those kfree(NULL), instead of just a if (!s)
> > return ENOMEM ?
> > 
> 
> You found a bug.  It was meant to be
> 
> 	if (s->stats == NULL)
> 
> 

Thanks, I will make sure this get fixed in ext4 patch queue.

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