[ARM] 3813/1: prevent >= 4G /dev/mem mmap()
authorLennert Buytenhek <buytenh@wantstofly.org>
Sat, 16 Sep 2006 09:50:22 +0000 (10:50 +0100)
committerRussell King <rmk+kernel@arm.linux.org.uk>
Mon, 25 Sep 2006 09:25:26 +0000 (10:25 +0100)
commit51635ad282ead58b9d164f07e1fb62a9456b427c
treea7d9fb162d09aaf02da3dee89520b10c07d92c8b
parentbf11d26cb96fe8221ef056eedab692e91634cc65
[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>
arch/arm/mm/mmap.c
include/asm-arm/io.h