2 files changed, 22 insertions, 0 deletions

diff --git a/arch/x86/kernel/process_32.c b/arch/x86/kernel/process_32.c
index 9663c2a74830..46d391d49de8 100644
--- a/arch/x86/kernel/process_32.c
+++ b/arch/x86/kernel/process_32.c
@@ -204,6 +204,10 @@ void cpu_idle(void)
         }
 }
 
+static void do_nothing(void *unused)
+{
+}
+
 void cpu_idle_wait(void)
 {
         unsigned int cpu, this_cpu = get_cpu();
@@ -228,6 +232,13 @@ void cpu_idle_wait(void)
                                 cpu_clear(cpu, map);
                 }
                 cpus_and(map, map, cpu_online_map);
+                /*
+                 * We waited 1 sec, if a CPU still did not call idle
+                 * it may be because it is in idle and not waking up
+                 * because it has nothing to do.
+                 * Give all the remaining CPUS a kick.
+                 */
+                smp_call_function_mask(map, do_nothing, 0, 0);
         } while (!cpus_empty(map));
 
         set_cpus_allowed(current, tmp);
diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c
index 6309b275cb9c..ab79e1dfa023 100644
--- a/arch/x86/kernel/process_64.c
+++ b/arch/x86/kernel/process_64.c
@@ -135,6 +135,10 @@ static void poll_idle (void)
         cpu_relax();
 }
 
+static void do_nothing(void *unused)
+{
+}
+
 void cpu_idle_wait(void)
 {
         unsigned int cpu, this_cpu = get_cpu();
@@ -160,6 +164,13 @@ void cpu_idle_wait(void)
                                 cpu_clear(cpu, map);
                 }
                 cpus_and(map, map, cpu_online_map);
+                /*
+                 * We waited 1 sec, if a CPU still did not call idle
+                 * it may be because it is in idle and not waking up
+                 * because it has nothing to do.
+                 * Give all the remaining CPUS a kick.
+                 */
+                smp_call_function_mask(map, do_nothing, 0, 0);
         } while (!cpus_empty(map));
 
         set_cpus_allowed(current, tmp);