1 files changed, 2 insertions, 0 deletions

diff --git a/include/linux/sched.h b/include/linux/sched.h
index 0917b3df12d5..fe970cdca83c 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -561,6 +561,8 @@ struct signal_struct {
 #define SIGNAL_CLD_CONTINUED    0x00000020
 #define SIGNAL_CLD_MASK         (SIGNAL_CLD_STOPPED|SIGNAL_CLD_CONTINUED)
 
+#define SIGNAL_UNKILLABLE       0x00000040 /* for init: ignore fatal signals */
+
 /* If true, all threads except ->group_exit_task have pending SIGKILL */
 static inline int signal_group_exit(const struct signal_struct *sig)
 {