linux-ext4 - Re: [PATCH] ext3: Remove redundant unlikely()

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Message-ID: <alpine.LFD.2.00.1012091704290.2731@dhcp-lab-213.englab.brq.redhat.com>
Date:	Thu, 9 Dec 2010 17:05:40 +0100 (CET)
From:	Lukas Czerner <lczerner@...hat.com>
To:	Tobias Klauser <tklauser@...tanz.ch>
cc:	Lukas Czerner <lczerner@...hat.com>, Jan Kara <jack@...e.cz>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Andreas Dilger <adilger.kernel@...ger.ca>,
	linux-ext4@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: Re: [PATCH] ext3: Remove redundant unlikely()

On Thu, 9 Dec 2010, Tobias Klauser wrote:

> On 2010-12-09 at 16:53:38 +0100, Lukas Czerner <lczerner@...hat.com> wrote:
> > On Thu, 9 Dec 2010, Tobias Klauser wrote:
> > 
> > > IS_ERR() already implies unlikely(), so it can be omitted here.
> > > 
> > > Signed-off-by: Tobias Klauser <tklauser@...tanz.ch>
> > > ---
> > >  fs/ext3/namei.c |    2 +-
> > >  1 files changed, 1 insertions(+), 1 deletions(-)
> > > 
> > > diff --git a/fs/ext3/namei.c b/fs/ext3/namei.c
> > > index bce9dce..268f776 100644
> > > --- a/fs/ext3/namei.c
> > > +++ b/fs/ext3/namei.c
> > > @@ -1047,7 +1047,7 @@ static struct dentry *ext3_lookup(struct inode * dir, struct dentry *dentry, str
> > >  			return ERR_PTR(-EIO);
> > >  		}
> > >  		inode = ext3_iget(dir->i_sb, ino);
> > > -		if (unlikely(IS_ERR(inode))) {
> > > +		if (IS_ERR(inode)) {
> > >  			if (PTR_ERR(inode) == -ESTALE) {
> > >  				ext3_error(dir->i_sb, __func__,
> > >  						"deleted inode referenced: %lu",
> > > 
> > 
> > Good catch, but I guess the same thing may be done for ext2/4.
> 
> I did so actually [0], [1]. Unfortunately I didn't submit the three patches as a
> series.
> 
> [0] http://lists.openwall.net/linux-ext4/2010/12/09/6
> [1] http://lists.openwall.net/linux-ext4/2010/12/09/5
> 
> Cheers
> Tobias
> 

Ok, my apologize. I saw only this one on the ext4 list.

-Lukas
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