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authorYinghai Lu <yhlu.kernel@gmail.com>2008-07-10 20:38:26 -0700
committerIngo Molnar <mingo@elte.hu>2008-07-11 10:24:04 +0200
commitf361a450bf1ad14e2b003217dbf3958638631265 (patch)
tree10c1e4dcc0047f6c37387cada6a0bceba088d2d2 /include/asm-x86/page.h
parentf302a5bbe5eb95f3d4227d5bd0e9b92b1b125f4f (diff)
x86: introduce max_low_pfn_mapped for 64-bit
when more than 4g memory is installed, don't map the big hole below 4g. Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Cc: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/asm-x86/page.h')
-rw-r--r--include/asm-x86/page.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/asm-x86/page.h b/include/asm-x86/page.h
index b52ed85f32f..28d7b4533b1 100644
--- a/include/asm-x86/page.h
+++ b/include/asm-x86/page.h
@@ -61,6 +61,7 @@ extern void map_devmem(unsigned long pfn, unsigned long size,
extern void unmap_devmem(unsigned long pfn, unsigned long size,
pgprot_t vma_prot);
+extern unsigned long max_low_pfn_mapped;
extern unsigned long max_pfn_mapped;
struct page;