Diffstat (limited to 'arch/x86/xen/setup.c')
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c
index 105db250105..b1dbdaa23ec 100644
@@ -204,6 +204,9 @@ char * __init xen_memory_setup(void)
* Even though this is normal, usable memory under Xen, reserve
* ISA memory anyway because too many things think they can poke
* about in there.
+ * In a dom0 kernel, this region is identity mapped with the
+ * hardware ISA area, so it really is out of bounds.
e820_add_region(ISA_START_ADDRESS, ISA_END_ADDRESS - ISA_START_ADDRESS,
@@ -367,7 +370,5 @@ void __init xen_arch_setup(void)
pm_idle = xen_idle;