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-rw-r--r--arch/powerpc/kernel/process.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index 4846bf543a8..59311ec0d42 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -353,6 +353,12 @@ struct task_struct *__switch_to(struct task_struct *prev,
account_process_vtime(current);
calculate_steal_time();
+ /*
+ * We can't take a PMU exception inside _switch() since there is a
+ * window where the kernel stack SLB and the kernel stack are out
+ * of sync. Hard disable here.
+ */
+ hard_irq_disable();
last = _switch(old_thread, new_thread);
local_irq_restore(flags);