linux-kernel - 4.10 and -stable fix for virtio_blk and virtually mapped stacks

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Date:   Wed,  4 Jan 2017 08:25:04 +0300
From:   Christoph Hellwig <hch@....de>
To:     axboe@...nel.dk, mst@...hat.com, jasowang@...hat.com
Cc:     linux-block@...r.kernel.org,
        virtualization@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org
Subject: 4.10 and -stable fix for virtio_blk and virtually mapped stacks

Without this fix attempts to do scsi passthrough on virtio_blk will crash
the system on virtually mapped stacks, which is something happening during
boot with many distros.