linux-kernel - Re: [PATCH] mm: Restore mmput

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Message-Id: <20170913150904.90a37a966a04ea394a2c3d9b@linux-foundation.org>
Date:   Wed, 13 Sep 2017 15:09:04 -0700
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Sherry Yang <sherryy@...roid.com>
Cc:     linux-kernel@...r.kernel.org, tkjos@...gle.com, maco@...gle.com,
        arve@...roid.com, gregkh@...uxfoundation.org,
        Ingo Molnar <mingo@...nel.org>, Michal Hocko <mhocko@...e.com>,
        Vlastimil Babka <vbabka@...e.cz>,
        David Rientjes <rientjes@...gle.com>,
        Andrea Arcangeli <aarcange@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Andy Lutomirski <luto@...nel.org>,
        Oleg Nesterov <oleg@...hat.com>,
        Hoeun Ryu <hoeun.ryu@...il.com>,
        Christoph Lameter <cl@...ux.com>,
        Vegard Nossum <vegard.nossum@...cle.com>,
        Frederic Weisbecker <fweisbec@...il.com>
Subject: Re: [PATCH] mm: Restore mmput_async

On Wed, 13 Sep 2017 17:59:27 -0400 Sherry Yang <sherryy@...roid.com> wrote:

> Restore asynchronous mmput, allowing mmput_async to be called
> from an atomic context in Android binder shrinker callback.
> 
> mmput_async was initially introduced in ec8d7c14e
> ("mm, oom_reaper: do not mmput synchronously from the
> oom reaper context"), and was removed in 212925802
> ("mm: oom: let oom_reap_task and exit_mmap run concurrently")

Presumably there's a patch somewhere which adds a call to mmput_async()
into drivers/android/binder.c?  Where is that patch?