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-rw-r--r--include/linux/pid.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/pid.h b/include/linux/pid.h
index 01a0d4e28506..cc896f0fc4e3 100644
--- a/include/linux/pid.h
+++ b/include/linux/pid.h
@@ -60,6 +60,7 @@ struct pid
 {
 	refcount_t count;
 	unsigned int level;
+	spinlock_t lock;
 	/* lists of tasks that use this pid */
 	struct hlist_head tasks[PIDTYPE_MAX];
 	struct hlist_head inodes;