From a437768c9c4bd58a8267ab8842540a30160ebdc4 Mon Sep 17 00:00:00 2001
From: Andrew Johnson <anj@aps.anl.gov>
Date: Fri, 20 Feb 2015 12:25:28 -0600
Subject: [PATCH] Applied
 linux-runtime-disable-RT-priorities-if-not-supported.patch

---
 src/libCom/osi/os/posix/osdThread.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/libCom/osi/os/posix/osdThread.c b/src/libCom/osi/os/posix/osdThread.c
index 30583e162..0f1523549 100644
--- a/src/libCom/osi/os/posix/osdThread.c
+++ b/src/libCom/osi/os/posix/osdThread.c
@@ -57,6 +57,7 @@ typedef struct commonAttr{
     int                maxPriority;
     int                minPriority;
     int                schedPolicy;
+    int                usePolicy;
 } commonAttr;
 
 typedef struct epicsThreadOSD {
@@ -79,6 +80,7 @@ typedef struct epicsThreadOSD {
 typedef struct {
     int min_pri, max_pri;
     int policy;
+    int ok;
 } priAvailable;
 #endif
 
@@ -138,6 +140,8 @@ static void setSchedulingPolicy(epicsThreadOSD *pthreadInfo,int policy)
 #if defined (_POSIX_THREAD_PRIORITY_SCHEDULING)
     int status;
 
+    if(!pcommonAttr->usePolicy) return;
+
     status = pthread_attr_getschedparam(
         &pthreadInfo->attr,&pthreadInfo->schedParam);
     checkStatusOnce(status,"pthread_attr_getschedparam");
@@ -278,6 +282,7 @@ int           low, try;
 
     prm->min_pri = min;
     prm->max_pri = try_pri(max, prm->policy) ? max-1 : max;
+    prm->ok = 1;
 
     return 0;
 }
@@ -290,6 +295,7 @@ void         *dummy;
 int          status;
 
     arg.policy = a_p->schedPolicy;
+    arg.ok = 0;
 
     status = pthread_create(&id, 0, find_pri_range, &arg);
     checkStatusQuit(status, "pthread_create","epicsThreadInit");
@@ -299,6 +305,7 @@ int          status;
 
     a_p->minPriority = arg.min_pri;
     a_p->maxPriority = arg.max_pri;
+    a_p->usePolicy = arg.ok;
 }
 #endif
 
@@ -608,6 +615,7 @@ epicsShareFunc void epicsShareAPI epicsThreadSetPriority(epicsThreadId pthreadIn
     pthreadInfo->osiPriority = priority;
     if(!pthreadInfo->isFifoScheduled) return;
 #if defined (_POSIX_THREAD_PRIORITY_SCHEDULING) 
+    if(!pcommonAttr->usePolicy) return;
     pthreadInfo->schedParam.sched_priority = getOssPriorityValue(pthreadInfo);
     status = pthread_attr_setschedparam(
         &pthreadInfo->attr,&pthreadInfo->schedParam);