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Message-ID: <1331246669.11248.449.camel@twins>
Subject: Re: [PATCH] hugetlbfs: lockdep annotate root inode properly
From: Peter Zijlstra <a.p.zijlstra@chello.nl>
To: Al Viro <viro@ZenIV.linux.org.uk>
Cc: Andrew Morton <akpm@linux-foundation.org>,
        "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>,
        linux-mm@kvack.org, davej@redhat.com, jboyer@redhat.com,
        tyhicks@canonical.com, linux-kernel@vger.kernel.org,
        Mimi Zohar <zohar@linux.vnet.ibm.com>
Date: Thu, 08 Mar 2012 23:44:29 +0100
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On Thu, 2012-03-08 at 21:44 +0000, Al Viro wrote:
> I suspect that they right thing would be to have a way to set explicit
> nesting rules, not tied to speficic call trace. 

See might_lock() / might_lock_read(), these are used to implement
might_fault(), which is used to annotate paths that could -- but rarely
do -- fault.