From: Lennert Buytenhek <buytenh@wantstofly.org>
Date: Sat, 16 Sep 2006 09:50:22 +0000 (+0100)
Subject: [ARM] 3813/1: prevent >= 4G /dev/mem mmap()
X-Git-Tag: v2.6.19-rc1~885^2~63
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=51635ad282ead58b9d164f07e1fb62a9456b427c;p=pandora-kernel.git

[ARM] 3813/1: prevent >= 4G /dev/mem mmap()

Prevent userland from mapping in physical address regions >= 4G by
checking for that in valid_mmap_phys_addr_range().

Unfortunately, we cannot override valid_mmap_phys_addr_range() without
also overriding valid_phys_addr_range(), so copy drivers/char/mem.c's
version of valid_phys_addr_range() over to arch/arm/mm/mmap.c as well.

Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---

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