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authorRussell King <rmk@dyn-67.arm.linux.org.uk>2009-09-07 15:06:42 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2009-09-12 11:48:09 +0100
commitb7cfda9fc3d7aa60cffab5367f2a72a4a70060cd (patch)
treea52c6cdbbc7973a4904ec499a607732832e4ca38 /drivers
parent5eb38f44839ec1aade167b125d86d265c886c195 (diff)
ARM: Fix pfn_valid() for sparse memory
On OMAP platforms, some people want to declare to segment up the memory between the kernel and a separate application such that there is a hole in the middle of the memory as far as Linux is concerned. However, they want to be able to mmap() the hole. This currently causes problems, because update_mmu_cache() thinks that there are valid struct pages for the "hole". Fix this by making pfn_valid() slightly more expensive, by checking whether the PFN is contained within the meminfo array. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Tested-by: Khasim Syed Mohammed <khasim@ti.com>
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