linux-kernel - Re: [PATCH 17/17] fs/ubifs: remove unnecessary new_valid

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Message-ID: <20150929134319.GA4307@bbox>
Date:	Tue, 29 Sep 2015 21:43:19 +0800
From:	Yaowei Bai <bywxiaobai@....com>
To:	Richard Weinberger <richard.weinberger@...il.com>
Cc:	Al Viro <viro@...iv.linux.org.uk>,
	Artem Bityutskiy <dedekind1@...il.com>,
	Adrian Hunter <adrian.hunter@...el.com>,
	"linux-mtd@...ts.infradead.org" <linux-mtd@...ts.infradead.org>,
	linux-fsdevel <linux-fsdevel@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 17/17] fs/ubifs: remove unnecessary new_valid_dev check

On Mon, Sep 28, 2015 at 09:20:32PM +0200, Richard Weinberger wrote:
> On Mon, Sep 28, 2015 at 4:53 PM, Yaowei Bai <bywxiaobai@....com> wrote:
> > As new_valid_dev always returns 1, so new_valid_dev check is not
> > needed, remove it.
> >
> > Signed-off-by: Yaowei Bai <bywxiaobai@....com>
> > ---
> >  fs/ubifs/dir.c  | 3 ---
> >  fs/ubifs/misc.h | 9 ++-------
> >  2 files changed, 2 insertions(+), 10 deletions(-)
> >
> > diff --git a/fs/ubifs/dir.c b/fs/ubifs/dir.c
> > index 5c27c66..1dd9267 100644
> > --- a/fs/ubifs/dir.c
> > +++ b/fs/ubifs/dir.c
> > @@ -787,9 +787,6 @@ static int ubifs_mknod(struct inode *dir, struct dentry *dentry,
> >
> >         dbg_gen("dent '%pd' in dir ino %lu", dentry, dir->i_ino);
> >
> > -       if (!new_valid_dev(rdev))
> > -               return -EINVAL;
> > -
> >         if (S_ISBLK(mode) || S_ISCHR(mode)) {
> >                 dev = kmalloc(sizeof(union ubifs_dev_desc), GFP_NOFS);
> >                 if (!dev)
> > diff --git a/fs/ubifs/misc.h b/fs/ubifs/misc.h
> > index ee7cb5e..0197ed6 100644
> > --- a/fs/ubifs/misc.h
> > +++ b/fs/ubifs/misc.h
> > @@ -155,13 +155,8 @@ static inline int ubifs_wbuf_sync(struct ubifs_wbuf *wbuf)
> >   */
> >  static inline int ubifs_encode_dev(union ubifs_dev_desc *dev, dev_t rdev)
> >  {
> > -       if (new_valid_dev(rdev)) {
> > -               dev->new = cpu_to_le32(new_encode_dev(rdev));
> > -               return sizeof(dev->new);
> > -       } else {
> > -               dev->huge = cpu_to_le64(huge_encode_dev(rdev));
> > -               return sizeof(dev->huge);
> > -       }
> > +       dev->huge = cpu_to_le64(huge_encode_dev(rdev));
> > +       return sizeof(dev->huge);
> 
> Please be careful.
> 
> dev->new = cpu_to_le32(new_encode_dev(rdev));
> return sizeof(dev->huge);
> 
> ...is the correct branch. You enabled the dead one.

Sorry about that, will resend fixing it. Thanks.

> 
> -- 
> Thanks,
> //richard

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