| commit | b7cfda9fc3d7aa60cffab5367f2a72a4a70060cd | |
| author | Russell King <rmk@dyn-67.arm.linux.org.uk> | |
| Mon, 7 Sep 2009 14:06:42 +0000 (7 15:06 +0100) | ||
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | |
| Sat, 12 Sep 2009 10:48:09 +0000 (12 11:48 +0100) | ||
| tree | a52c6cdbbc7973a4904ec499a607732832e4ca38 | treesnapshot (tar.gz zip) |
| parent | 5eb38f44839ec1aade167b125d86d265c886c195 | commitdiff |
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>
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>
| arch/arm/include/asm/memory.h | diffblobblamehistory | |
| arch/arm/include/asm/page.h | diffblobblamehistory | |
| arch/arm/mm/init.c | diffblobblamehistory |