From: Catalin Marinas <catalin.marinas@arm.com>
Date: Fri, 24 Oct 2014 17:16:47 +0000 (+0100)
Subject: arm64: Fix memblock current_limit with 64K pages and 48-bit VA
X-Git-Tag: fixes-against-v3.18-rc2~7^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3dec0fe48a8936528aae2fc3f904c2c9a34ba368;p=pandora-kernel.git

arm64: Fix memblock current_limit with 64K pages and 48-bit VA

With 48-bit VA space, the 64K page configuration uses 3 levels instead
of 2 and PUD_SIZE != PMD_SIZE. Since with 64K pages we only cover
PMD_SIZE with the initial swapper_pg_dir populated in head.S, the
memblock current_limit needs to be set accordingly in map_mem() to avoid
allocating unmapped memory. The memblock current_limit is progressively
increased as more blocks are mapped.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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