diff options
Diffstat (limited to 'arch/x86/mm')
| -rw-r--r-- | arch/x86/mm/cpu_entry_area.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/x86/mm/cpu_entry_area.c b/arch/x86/mm/cpu_entry_area.c index a00d0d059c8a..752ad11d6868 100644 --- a/arch/x86/mm/cpu_entry_area.c +++ b/arch/x86/mm/cpu_entry_area.c @@ -98,10 +98,12 @@ static void __init percpu_setup_exception_stacks(unsigned int cpu) /* * The exceptions stack mappings in the per cpu area are protected - * by guard pages so each stack must be mapped separately. + * by guard pages so each stack must be mapped separately. DB2 is + * not mapped; it just exists to catch triple nesting of #DB. */ cea_map_stack(DF); cea_map_stack(NMI); + cea_map_stack(DB1); cea_map_stack(DB); cea_map_stack(MCE); } |