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authorYinghai Lu <yinghai@kernel.org>2010-01-22 11:21:04 +0800
committerH. Peter Anvin <hpa@zytor.com>2010-02-01 16:58:17 -0800
commit1b5576e69a5fe168c08a159685ac366316ac9bbc (patch)
tree0f5948f32578e1b74edb86ff8008ef42faa7f32f /arch/x86/mm
parent53df8fdc15fb646b0219e43c989c2cdab1ab100c (diff)
downloadtalos-op-linux-1b5576e69a5fe168c08a159685ac366316ac9bbc.tar.gz
talos-op-linux-1b5576e69a5fe168c08a159685ac366316ac9bbc.zip
x86: Remove BIOS data range from e820
In preparation for moving to the generic page_is_ram(), make explicit what we expect to be reserved and not reserved. Tested-by: Wu Fengguang <fengguang.wu@intel.com> Signed-off-by: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <20100122033004.335813103@intel.com> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'arch/x86/mm')
-rw-r--r--arch/x86/mm/ioremap.c16
1 files changed, 0 insertions, 16 deletions
diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c
index 334e63ca7b2b..30e068d6462e 100644
--- a/arch/x86/mm/ioremap.c
+++ b/arch/x86/mm/ioremap.c
@@ -29,22 +29,6 @@ int page_is_ram(unsigned long pagenr)
resource_size_t addr, end;
int i;
- /*
- * A special case is the first 4Kb of memory;
- * This is a BIOS owned area, not kernel ram, but generally
- * not listed as such in the E820 table.
- */
- if (pagenr == 0)
- return 0;
-
- /*
- * Second special case: Some BIOSen report the PC BIOS
- * area (640->1Mb) as ram even though it is not.
- */
- if (pagenr >= (BIOS_BEGIN >> PAGE_SHIFT) &&
- pagenr < (BIOS_END >> PAGE_SHIFT))
- return 0;
-
for (i = 0; i < e820.nr_map; i++) {
/*
* Not usable memory:
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