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-rw-r--r--include/uapi/linux/pidfd.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/include/uapi/linux/pidfd.h b/include/uapi/linux/pidfd.h
index 5406fbc13074..2e6461459877 100644
--- a/include/uapi/linux/pidfd.h
+++ b/include/uapi/linux/pidfd.h
@@ -7,6 +7,7 @@
#include <linux/fcntl.h>
/* Flags for pidfd_open(). */
-#define PIDFD_NONBLOCK O_NONBLOCK
+#define PIDFD_NONBLOCK O_NONBLOCK
+#define PIDFD_THREAD O_EXCL
#endif /* _UAPI_LINUX_PIDFD_H */