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ARM: 7169/1: topdown mmap support

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Similar to other architectures, this adds topdown mmap support in user
process address space allocation policy. This allows mmap sizes greater
than 2GB. This support is largely copied from MIPS and the generic
implementations.

The address space randomization is moved into arch_pick_mmap_layout.

Tested on V-Express with ubuntu and a mmap test from here:
https://bugs.launchpad.net/bugs/861296

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Rob Herring
2011-11-22 04:01:07 +01:00
committed by Russell King
parent d22759ed56
commit 7dbaa46678
3 changed files with 171 additions and 5 deletions
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arch/arm/include/asm/processor.h
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@@ -123,6 +123,8 @@ static inline void prefetch(const void *ptr)
#endif
#define HAVE_ARCH_PICK_MMAP_LAYOUT
#endif
#endif /* __ASM_ARM_PROCESSOR_H */