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-rw-r--r--arch/s390/kernel/process.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/s390/kernel/process.c b/arch/s390/kernel/process.c
index bba4fa74b321..172fe1121d99 100644
--- a/arch/s390/kernel/process.c
+++ b/arch/s390/kernel/process.c
@@ -120,6 +120,7 @@ int copy_thread(unsigned long clone_flags, unsigned long new_stackp,
memset(&p->thread.per_user, 0, sizeof(p->thread.per_user));
memset(&p->thread.per_event, 0, sizeof(p->thread.per_event));
clear_tsk_thread_flag(p, TIF_SINGLE_STEP);
+ p->thread.per_flags = 0;
/* Initialize per thread user and system timer values */
ti = task_thread_info(p);
ti->user_timer = 0;