linux-kernel - Re: [PATCH] mm: cleanup balance_dirty_pages() that leave variables uninitialized

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Date:	Tue, 13 Oct 2015 09:41:52 +0800
From:	Liao Tonglang <liaotonglang@...il.com>
To:	Jan Kara <jack@...e.cz>
Cc:	tj@...nel.org, axboe@...com, akpm@...ux-foundation.org,
	hannes@...xchg.org, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mm: cleanup balance_dirty_pages() that leave variables
 uninitialized

On 2015/10/12 20:58, Jan Kara wrote:
> What
> gcc version are you using?
It is the last line of my gcc -v command.
     gcc version 4.8.3 20140911 (Red Hat 4.8.3-9) (GCC)
And it warn like this:
mm/page-writeback.c: In function ‘balance_dirty_pages.isra.26’:
mm/page-writeback.c:1537:26: warning: ‘m_thresh’ may be used 
uninitialized in this function [-Wmaybe-uninitialized]
    unsigned long m_dirty, m_thresh, m_bg_thresh;
                           ^
mm/page-writeback.c:1537:17: warning: ‘m_dirty’ may be used 
uninitialized in this function [-Wmaybe-uninitialized]
    unsigned long m_dirty, m_thresh, m_bg_thresh;
                  ^

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