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From: Hao Lee <haolee.swjtu@gmail.com>
To: Al Viro <viro@zeniv.linux.org.uk>
Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] fs: Eliminate a local variable to make the code more clear
Date: Tue, 8 Sep 2020 23:11:56 +0000	[thread overview]
Message-ID: <20200908231156.GA23779@haolee.github.io> (raw)
In-Reply-To: <20200908184857.GT1236603@ZenIV.linux.org.uk>

On Tue, Sep 08, 2020 at 07:48:57PM +0100, Al Viro wrote:
> On Tue, Sep 08, 2020 at 01:06:56PM +0000, Hao Lee wrote:
> > ping
> > 
> > On Wed, Jul 29, 2020 at 03:21:28PM +0000, Hao Lee wrote:
> > > The dentry local variable is introduced in 'commit 84d17192d2afd ("get
> > > rid of full-hash scan on detaching vfsmounts")' to reduce the length of
> > > some long statements for example
> > > mutex_lock(&path->dentry->d_inode->i_mutex). We have already used
> > > inode_lock(dentry->d_inode) to do the same thing now, and its length is
> > > acceptable. Furthermore, it seems not concise that assign path->dentry
> > > to local variable dentry in the statement before goto. So, this function
> > > would be more clear if we eliminate the local variable dentry.
> 
> How does it make the function more clear?  More specifically, what
> analysis of behaviour is simplified by that?

When I first read this function, it takes me a few seconds to think
about if the local variable dentry is always equal to path->dentry and
want to know if it has special purpose. This local variable may confuse
other people too, so I think it would be better to eliminate it.

Thanks,
Hao Lee

  reply	other threads:[~2020-09-08 23:12 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-29 15:21 Hao Lee
2020-08-14  6:01 ` Hao Lee
2020-09-08 13:06 ` Hao Lee
2020-09-08 18:48   ` Al Viro
2020-09-08 23:11     ` Hao Lee [this message]
2020-09-09 12:54       ` Eric W. Biederman
2020-09-09 15:32         ` Hao Lee

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