linux-kernel - Re: linux-next: build failure after merge of the akpm-current tree

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Message-ID: <CA+55aFwWEqzGi7uW_xPt=eC0FC-5qnom=W4x87xbH_a2Oy4=6A@mail.gmail.com>
Date:	Fri, 30 Aug 2013 08:25:06 -0700
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Stephen Rothwell <sfr@...b.auug.org.au>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-next <linux-next@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Waiman Long <Waiman.Long@...com>,
	Namjae Jeon <namjae.jeon@...sung.com>,
	Ravishankar N <ravi.n1@...sung.com>,
	Amit Sahrawat <a.sahrawat@...sung.com>
Subject: Re: linux-next: build failure after merge of the akpm-current tree

On Fri, Aug 30, 2013 at 1:12 AM, Stephen Rothwell <sfr@...b.auug.org.au> wrote:
>
> I don't know if it is safe to read d_lockref.count without locking

That's not the issue. Since commit 84d08fa888e7 ("helper for reading
->d_count") non-core VFS code shouldn't try to access d_count directly
at all. So instead of "dentry->d_count" it should use
"d_count(dentry)". Then the code doesn't need to know about lockrefs
or anything like that at all.

               Linus
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