X-Git-Url: https://rtime.felk.cvut.cz/gitweb/zynq/linux.git/blobdiff_plain/b450e900fdb473a53613ad014f31eedbc80b1c90..aebcc440d27130c7bfb8868bc7246698e76d5f45:/ipc/sem.c

diff --git a/ipc/sem.c b/ipc/sem.c
index 10b94bc59d4a..b8360eaacc7a 100644
--- a/ipc/sem.c
+++ b/ipc/sem.c
@@ -712,6 +712,13 @@ undo:
 static void wake_up_sem_queue_prepare(struct list_head *pt,
 				struct sem_queue *q, int error)
 {
+#ifdef CONFIG_PREEMPT_RT_BASE
+	struct task_struct *p = q->sleeper;
+	get_task_struct(p);
+	q->status = error;
+	wake_up_process(p);
+	put_task_struct(p);
+#else
 	if (list_empty(pt)) {
 		/*
 		 * Hold preempt off so that we don't get preempted and have the
@@ -723,6 +730,7 @@ static void wake_up_sem_queue_prepare(struct list_head *pt,
 	q->pid = error;
 
 	list_add_tail(&q->list, pt);
+#endif
 }
 
 /**
@@ -736,6 +744,7 @@ static void wake_up_sem_queue_prepare(struct list_head *pt,
  */
 static void wake_up_sem_queue_do(struct list_head *pt)
 {
+#ifndef CONFIG_PREEMPT_RT_BASE
 	struct sem_queue *q, *t;
 	int did_something;
 
@@ -748,6 +757,7 @@ static void wake_up_sem_queue_do(struct list_head *pt)
 	}
 	if (did_something)
 		preempt_enable();
+#endif
 }
 
 static void unlink_queue(struct sem_array *sma, struct sem_queue *q)