From mboxrd@z Thu Jan  1 00:00:00 1970
From: Al Viro <viro@ZenIV.linux.org.uk>
Subject: Re: [PATCH v5 00/12] Lockless update of reference count protected by
 spinlock
Date: Fri, 5 Jul 2013 16:02:24 +0100
Message-ID: <20130705150224.GS4165@ZenIV.linux.org.uk>
References: <1373035656-40600-1-git-send-email-Waiman.Long@hp.com>
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Cc: Jeff Layton <jlayton@redhat.com>,
	Miklos Szeredi <mszeredi@suse.cz>,
	Ingo Molnar <mingo@redhat.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
	Peter Zijlstra <peterz@infradead.org>,
	Steven Rostedt <rostedt@goodmis.org>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Benjamin Herrenschmidt <benh@kernel.crashing.org>,
	Andi Kleen <andi@firstfloor.org>,
	"Chandramouleeswaran, Aswin" <aswin@hp.com>,
	"Norton, Scott J" <scott.norton@hp.com>
To: Waiman Long <Waiman.Long@hp.com>
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On Fri, Jul 05, 2013 at 10:47:33AM -0400, Waiman Long wrote:
> v4->v5:
>  - Add a d_count() helper for readonly access of reference count and
>    change all references to d_count outside of dcache.c, dcache.h
>    and namei.c to use d_count().

Sigh...  You are breaking bisectability again.  This helper should
be introduced *first*, along with conversion to it.  Then you can
do the rest on top of that.

I've just pushed such commit into vfs.git#for-linus; please, do the rest
on top of it.  And keep it bisectable, i.e. so that at any intermediate
point the tree would build and work.