linux-kernel - Re: [PATCH] mm/mmu_notifier: rename mmu_notifier_synchronize() to <...>

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Message-ID: <20181106132632.GD2453@dhcp22.suse.cz>
Date:   Tue, 6 Nov 2018 14:26:32 +0100
From:   Michal Hocko <mhocko@...nel.org>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     Sean Christopherson <sean.j.christopherson@...el.com>,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        Peter Zijlstra <peterz@...radead.org>,
        Jérôme Glisse <jglisse@...hat.com>,
        Oded Gabbay <oded.gabbay@....com>
Subject: Re: [PATCH] mm/mmu_notifier: rename mmu_notifier_synchronize() to
 <...>_barrier()

On Mon 05-11-18 12:18:33, Andrew Morton wrote:
> On Mon,  5 Nov 2018 11:29:55 -0800 Sean Christopherson <sean.j.christopherson@...el.com> wrote:
[...]
> > -EXPORT_SYMBOL_GPL(mmu_notifier_synchronize);
> > +EXPORT_SYMBOL_GPL(mmu_notifier_barrier);
> >  
> >  /*
> >   * This function can't run concurrently against mmu_notifier_register
> 
> But as it has no callers, why retain it?

Exported symbols are not freed and if this is not used by any in-kernel
code then I would just remove it.

-- 
Michal Hocko
SUSE Labs