1 files changed, 3 insertions, 0 deletions

diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index d205b52e3850..5acb5a176dbe 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -1577,6 +1577,9 @@ int set_thread_tidr(struct task_struct *t)
         if (t != current)
                 return -EINVAL;
 
+        if (t->thread.tidr)
+                return 0;
+
         rc = assign_thread_tidr();
         if (rc < 0)
                 return rc;