1 files changed, 11 insertions, 0 deletions
diff --git a/ipc/sem.c b/ipc/sem.c
index 910c7a3..454f6c6 100644
--- a/ipc/sem.c
+++ b/ipc/sem.c
@@ -1000,6 +1000,17 @@ static int check_qop(struct sem_array *sma, int semnum, struct sem_queue *q,
 {
 	struct sembuf *sop = q->blocking;
 
+	/*
+	 * Linux always (since 0.99.10) reported a task as sleeping on all
+	 * semaphores. This violates SUS, therefore it was changed to the
+	 * standard compliant behavior.
+	 * Give the administrators a chance to notice that an application
+	 * might misbehave because it relies on the Linux behavior.
+	 */
+	pr_info_once("semctl(GETNCNT/GETZCNT) is since 3.16 Single Unix Specification compliant.\n"
+			"The task %s (%d) triggered the difference, watch for misbehavior.\n",
+			current->comm, task_pid_nr(current));
+
 	if (sop->sem_num != semnum)
 		return 0;