linux-kernel - Re: [PATCH 7/7] fs: Do not overload update

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Message-ID: <CABeXuvq1+t++mCT0xwcMMkwSWh7VxPTGP7zzFCiMC=vyz5bK-Q@mail.gmail.com>
Date:   Mon, 2 Dec 2019 15:13:06 -0800
From:   Deepa Dinamani <deepa.kernel@...il.com>
To:     Christoph Hellwig <hch@...radead.org>
Cc:     Alexander Viro <viro@...iv.linux.org.uk>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux FS-devel Mailing List <linux-fsdevel@...r.kernel.org>,
        Arnd Bergmann <arnd@...db.de>
Subject: Re: [PATCH 7/7] fs: Do not overload update_time

On Mon, Dec 2, 2019 at 9:48 AM Christoph Hellwig <hch@...radead.org> wrote:
>
> On Fri, Nov 29, 2019 at 09:30:30PM -0800, Deepa Dinamani wrote:
> > -     int (*update_time)(struct inode *, struct timespec64 *, int);
> > +     int (*cb)(struct inode *, struct timespec64 *, int);
> >
> > -     update_time = inode->i_op->update_time ? inode->i_op->update_time :
> > +     cb = inode->i_op->update_time ? inode->i_op->update_time :
> >               generic_update_time;
> >
> > -     return update_time(inode, time, flags);
> > +     return cb(inode, time, flags);
>
> Just killing the pointless local variable cleans the function op, and
> also avoids the expensive indirect call for the common case:

Will update this in v2. Thanks.

-Deepa