linux-kernel - Re: [PATCH rcu v2 09/20] fs: Remove CONFIG

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Date:   Thu, 12 Jan 2023 17:10:50 -0800
From:   "Paul E. McKenney" <paulmck@...nel.org>
To:     Jeff Layton <jlayton@...nel.org>
Cc:     rcu@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel-team@...a.com, rostedt@...dmis.org,
        Chuck Lever <chuck.lever@...cle.com>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        linux-fsdevel@...r.kernel.org,
        John Ogness <john.ogness@...utronix.de>
Subject: Re: [PATCH rcu v2 09/20] fs: Remove CONFIG_SRCU

On Thu, Jan 12, 2023 at 08:03:48PM -0500, Jeff Layton wrote:
> On Thu, 2023-01-12 at 16:11 -0800, Paul E. McKenney wrote:
> > Now that the SRCU Kconfig option is unconditionally selected, there is
> > no longer any point in conditional compilation based on CONFIG_SRCU.
> > Therefore, remove the #ifdef and throw away the #else clause.
> > 
> > Signed-off-by: Paul E. McKenney <paulmck@...nel.org>
> > Cc: Jeff Layton <jlayton@...nel.org>
> > Cc: Chuck Lever <chuck.lever@...cle.com>
> > Cc: Alexander Viro <viro@...iv.linux.org.uk>
> > Cc: <linux-fsdevel@...r.kernel.org>
> > Reviewed-by: John Ogness <john.ogness@...utronix.de>
> > ---
> >  fs/locks.c | 25 -------------------------
> >  1 file changed, 25 deletions(-)
> > 
> > diff --git a/fs/locks.c b/fs/locks.c
> > index 8f01bee177159..1909a9de242c8 100644
> > --- a/fs/locks.c
> > +++ b/fs/locks.c
> > @@ -1889,7 +1889,6 @@ int generic_setlease(struct file *filp, long arg, struct file_lock **flp,
> >  }
> >  EXPORT_SYMBOL(generic_setlease);
> >  
> > -#if IS_ENABLED(CONFIG_SRCU)
> >  /*
> >   * Kernel subsystems can register to be notified on any attempt to set
> >   * a new lease with the lease_notifier_chain. This is used by (e.g.) nfsd
> > @@ -1923,30 +1922,6 @@ void lease_unregister_notifier(struct notifier_block *nb)
> >  }
> >  EXPORT_SYMBOL_GPL(lease_unregister_notifier);
> >  
> > -#else /* !IS_ENABLED(CONFIG_SRCU) */
> > -static inline void
> > -lease_notifier_chain_init(void)
> > -{
> > -}
> > -
> > -static inline void
> > -setlease_notifier(long arg, struct file_lock *lease)
> > -{
> > -}
> > -
> > -int lease_register_notifier(struct notifier_block *nb)
> > -{
> > -	return 0;
> > -}
> > -EXPORT_SYMBOL_GPL(lease_register_notifier);
> > -
> > -void lease_unregister_notifier(struct notifier_block *nb)
> > -{
> > -}
> > -EXPORT_SYMBOL_GPL(lease_unregister_notifier);
> > -
> > -#endif /* IS_ENABLED(CONFIG_SRCU) */
> > -
> >  /**
> >   * vfs_setlease        -       sets a lease on an open file
> >   * @filp:	file pointer
> 
> Reviewed-by: Jeff Layton <jlayton@...nel.org>

Thank you!  I will apply this on my next rebase.

							Thanx, Paul