[Xen-devel] [PATCH 7 of 7] x86: always explicitly map acpi memory

[Jeremy Fitzhardinge <jeremy@xxxxxxxx>]

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@xxxxxxxxxx>
---
 arch/x86/kernel/acpi/boot.c |    3 ---
 1 file changed, 3 deletions(-)

diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
--- a/arch/x86/kernel/acpi/boot.c
+++ b/arch/x86/kernel/acpi/boot.c
@@ -126,9 +126,6 @@
 
        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);



_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel