litmus core: report ready tasks to user space

2 files changed, 21 insertions, 2 deletions

diff --git a/litmus/litmus.c b/litmus/litmus.c
index becc00069b..60e7507ba0 100644
--- a/litmus/litmus.c
+++ b/litmus/litmus.c
@@ -701,6 +701,9 @@ static struct sysrq_key_op sysrq_kill_rt_tasks_op = {
 
 #endif
 
+/* in sync.c */
+int count_tasks_waiting_for_release(void);
+
 static int proc_read_stats(char *page, char **start,
                            off_t off, int count,
                            int *eof, void *data)
@@ -708,8 +711,10 @@ static int proc_read_stats(char *page, char **start,
         int len;
 
         len = snprintf(page, PAGE_SIZE,
-                       "real-time task count = %d\n",
-                       atomic_read(&rt_task_count));
+                       "real-time tasks   = %d\n"
+                       "ready for release = %d\n",
+                       atomic_read(&rt_task_count),
+                       count_tasks_waiting_for_release());
         return len;
 }
 
diff --git a/litmus/sync.c b/litmus/sync.c
index 9c9941fc27..bd2c677d64 100644
--- a/litmus/sync.c
+++ b/litmus/sync.c
@@ -33,6 +33,20 @@ static long do_wait_for_ts_release(void)
         return ret;
 }
 
+int count_tasks_waiting_for_release(void)
+{
+        long flags;
+        int task_count = 0;
+        struct list_head *pos;
+
+        spin_lock_irqsave(&ts_release.wait.lock, flags);
+        list_for_each(pos, &ts_release.wait.task_list) {
+                task_count++;
+        }
+        spin_unlock_irqrestore(&ts_release.wait.lock, flags);
+
+        return task_count;
+}
 
 static long do_release_ts(lt_t start)
 {