From df6cf5c8af54e3e89643511272f6f5f5cfb71a7d Mon Sep 17 00:00:00 2001
From: Colin Cross <ccross@android.com>
Date: Fri, 13 Dec 2013 19:26:30 -0800
Subject: [PATCH] ion: add helper to zero contiguous region of pages

Add ion_heap_pages_zero for ion heaps to use to zero pages
during initialization or allocation, when a struct ion_buffer
may not be available.  Use it from the chunk heap and carveout
heaps.

Signed-off-by: Colin Cross <ccross@android.com>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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