From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Wed, 5 Dec 2012 11:08:29 +0000 (+0100)
Subject: target/file: Fix 32-bit highmem breakage for SGL -> iovec mapping
X-Git-Tag: v3.8-rc1~94^2~6
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=40ff2c3b3da35dd3a00ac6722056a59b4b3f2caf;p=pandora-kernel.git

target/file: Fix 32-bit highmem breakage for SGL -> iovec mapping

This patch changes vectored file I/O to use kmap + kunmap when mapping
incoming SGL memory -> struct iovec in order to properly support 32-bit
highmem configurations.  This is because an extra bounce buffer may be
required when processing scatterlist pages allocated with GFP_KERNEL.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: stable@vger.kernel.org
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
---

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