x86: always explicitly map acpi memory

Always map acpi tables, rather than assuming we can use the normal
linear mapping to access the acpi tables.  This is necessary in a
virtual environment where the linear mappings are to pseudo-physical
memory, but the acpi tables exist at a real physical address.  It
doesn't hurt to map in the normal non-virtual case, so just do it
unconditionally.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Acked-by: Len Brown <len.brown@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 0 insertions, 3 deletions

diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
index c518599e4264..5424a18f2e4e 100644
--- a/arch/x86/kernel/acpi/boot.c
+++ b/arch/x86/kernel/acpi/boot.c
@@ -127,9 +127,6 @@ char *__init __acpi_map_table(unsigned long phys, unsigned long size)
         if (!phys || !size)
                 return NULL;
 
-        if (phys+size <= (max_low_pfn_mapped << PAGE_SHIFT))
-                return __va(phys);
-
         if (prev_map)
                 early_iounmap(prev_map, prev_size);