From mboxrd@z Thu Jan  1 00:00:00 1970
From: Christoph Hellwig <hch@lst.de>
Subject: libata: remove the global response buffer
Date: Tue, 10 Jan 2017 09:41:42 +0100
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Cc: geert@linux-m68k.org, linux-ide@vger.kernel.org

Avoid the need for a global 4k buffer by allocating no response buffer
for commands that don't return data, a small on-stack one for the ATAPI
fixup, or a kmalloced one for all other emulated commands.