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Date: Tue, 15 Oct 2019 18:40:27 +0200
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: Matthew Wilcox <willy@infradead.org>
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
	Frank Rowand <frank.rowand@am.sony.com>,
	Peter Zijlstra <peterz@infradead.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	Steven Rostedt <rostedt@goodmis.org>
Subject: Re: [PATCH RT] Revert "ARM: Initialize split page table locks for
 vector page"
Message-ID: <20191015164026.6lfu4meeclpijxar@linutronix.de>
References: <20191014160238.enawbbfcxnbdrlch@linutronix.de>
 <20191015162609.GH32665@bombadil.infradead.org>
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On 2019-10-15 09:26:09 [-0700], Matthew Wilcox wrote:
> Did your test build have ALLOC_SPLIT_PTLOCKS defined?

I tried to explain that ptlock_ptr() returns NULL for the page before
the ctor invocation and non-NULL afterwards which means that
USE_SPLIT_PTE_PTLOCKS and ALLOC_SPLIT_PTLOCKS was defined.

Sebastian