From mboxrd@z Thu Jan  1 00:00:00 1970
From: Christoph Hellwig <hch@infradead.org>
Subject: Re: [PATCH 1/5] cramfs: direct memory access support
Date: Sat, 12 Aug 2017 00:49:27 -0700
Message-ID: <20170812074927.GA8703@infradead.org>
References: <20170811192252.19062-1-nicolas.pitre@linaro.org>
 <20170811192252.19062-2-nicolas.pitre@linaro.org>
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To: Nicolas Pitre <nicolas.pitre@linaro.org>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>, linux-fsdevel@vger.kernel.org, linux-embedded@vger.kernel.org, linux-kernel@vger.kernel.org, Chris Brandt <Chris.Brandt@renesas.com>

Direct physical memory access in a file system is never safe.
Please make sure this goes through struct dax_operations.