diff options
| author | Yinghai Lu <yinghai@kernel.org> | 2010-01-22 03:21:04 (GMT) |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2010-02-02 00:58:17 (GMT) |
| commit | 1b5576e69a5fe168c08a159685ac366316ac9bbc (patch) | |
| tree | 0f5948f32578e1b74edb86ff8008ef42faa7f32f /arch/x86/mm | |
| parent | 53df8fdc15fb646b0219e43c989c2cdab1ab100c (diff) | |
| download | linux-1b5576e69a5fe168c08a159685ac366316ac9bbc.tar.xz | |
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.c | 16 |
1 files changed, 0 insertions, 16 deletions
diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c index 334e63c..30e068d 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: |