2 files changed, 7 insertions, 0 deletions

diff --git a/arch/sparc64/kernel/process.c b/arch/sparc64/kernel/process.c
index 7d10b0397091..2f89206e008f 100644
--- a/arch/sparc64/kernel/process.c
+++ b/arch/sparc64/kernel/process.c
@@ -74,7 +74,9 @@ void cpu_idle(void)
                 while (!need_resched())
                         barrier();
 
+                preempt_enable_no_resched();
                 schedule();
+                preempt_disable();
                 check_pgt_cache();
         }
 }
@@ -93,7 +95,9 @@ void cpu_idle(void)
                 if (need_resched()) {
                         unidle_me();
                         clear_thread_flag(TIF_POLLING_NRFLAG);
+                        preempt_enable_no_resched();
                         schedule();
+                        preempt_disable();
                         set_thread_flag(TIF_POLLING_NRFLAG);
                         check_pgt_cache();
                 }
diff --git a/arch/sparc64/kernel/smp.c b/arch/sparc64/kernel/smp.c
index 5d90ee9aebf1..8aca4b1dc04e 100644
--- a/arch/sparc64/kernel/smp.c
+++ b/arch/sparc64/kernel/smp.c
@@ -168,6 +168,9 @@ void __init smp_callin(void)
                 rmb();
 
         cpu_set(cpuid, cpu_online_map);
+
+        /* idle thread is expected to have preempt disabled */
+        preempt_disable();
 }
 
 void cpu_panic(void)