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Date: Mon, 28 Dec 2015 10:45:03 -0500
From: Tejun Heo <tj@kernel.org>
To: Ross Zwisler <ross.zwisler@linux.intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
        Li Zefan <lizefan@huawei.com>,
        Daniel Wagner <daniel.wagner@bmw-carit.de>,
        Johannes Weiner <hannes@cmpxchg.org>, cgroups@vger.kernel.org,
        linux-kernel@vger.kernel.org, Dave Jones <davej@codemonkey.org.uk>,
        kernel-team@fb.com, Aleksa Sarai <cyphar@cyphar.com>,
        Michal Hocko <mhocko@kernel.org>, Ingo Molnar <mingo@redhat.com>,
        Peter Zijlstra <peterz@infradead.org>,
        Neil Horman <nhorman@tuxdriver.com>
Subject: Re: [PATCH] cgroup: Fix uninitialized variable warning
Message-ID: <20151228154503.GP5003@mtj.duckdns.org>
References: <1450907607-5060-1-git-send-email-ross.zwisler@linux.intel.com>
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On Wed, Dec 23, 2015 at 02:53:27PM -0700, Ross Zwisler wrote:
> Commit 1f7dd3e5a6e4 ("cgroup: fix handling of multi-destination migration
> from subtree_control enabling") introduced the following compiler warning:
> 
> mm/memcontrol.c: In function ‘mem_cgroup_can_attach’:
> mm/memcontrol.c:4790:9: warning: ‘memcg’ may be used uninitialized in this function [-Wmaybe-uninitialized]
>    mc.to = memcg;
>          ^
> 
> Fix this by initializing 'memcg' to NULL.
> 
> This was found using gcc (GCC) 4.9.2 20150212 (Red Hat 4.9.2-6).
> 
> Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com>

Applied to cgroup/for-4.5.

Thanks.

-- 
tejun