linux-kernel - Re: [PATCH v4 2/9] mm/huge_memory: fix uninitialized compiler warning

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Message-ID: <20191119154217.GC382712@cmpxchg.org>
Date:   Tue, 19 Nov 2019 10:42:17 -0500
From:   Johannes Weiner <hannes@...xchg.org>
To:     Alex Shi <alex.shi@...ux.alibaba.com>
Cc:     cgroups@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, akpm@...ux-foundation.org,
        mgorman@...hsingularity.net, tj@...nel.org, hughd@...gle.com,
        khlebnikov@...dex-team.ru, daniel.m.jordan@...cle.com,
        yang.shi@...ux.alibaba.com, willy@...radead.org,
        shakeelb@...gle.com
Subject: Re: [PATCH v4 2/9] mm/huge_memory: fix uninitialized compiler warning

On Tue, Nov 19, 2019 at 08:23:16PM +0800, Alex Shi wrote:
> ../mm/huge_memory.c: In function ‘split_huge_page_to_list’:
> ../mm/huge_memory.c:2766:9: warning: ‘flags’ may be used uninitialized
> in this function [-Wmaybe-uninitialized]
>   lruvec = lock_page_lruvec_irqsave(head, pgdata, flags);
>   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Like with the previous patch, there is no lock_page_lruvec_irqsave()
at this point in the series.