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-rw-r--r--include/linux/timer.h1
-rw-r--r--kernel/time/timer.c2
2 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/timer.h b/include/linux/timer.h
index 07910ae5ddd9..d10bc7e73b41 100644
--- a/include/linux/timer.h
+++ b/include/linux/timer.h
@@ -67,6 +67,7 @@ struct timer_list {
#define TIMER_DEFERRABLE 0x00080000
#define TIMER_PINNED 0x00100000
#define TIMER_IRQSAFE 0x00200000
+#define TIMER_INIT_FLAGS (TIMER_DEFERRABLE | TIMER_PINNED | TIMER_IRQSAFE)
#define TIMER_ARRAYSHIFT 22
#define TIMER_ARRAYMASK 0xFFC00000
diff --git a/kernel/time/timer.c b/kernel/time/timer.c
index a16764b0116e..25e048d0e660 100644
--- a/kernel/time/timer.c
+++ b/kernel/time/timer.c
@@ -794,6 +794,8 @@ static void do_init_timer(struct timer_list *timer,
{
timer->entry.pprev = NULL;
timer->function = func;
+ if (WARN_ON_ONCE(flags & ~TIMER_INIT_FLAGS))
+ flags &= TIMER_INIT_FLAGS;
timer->flags = flags | raw_smp_processor_id();
lockdep_init_map(&timer->lockdep_map, name, key, 0);
}