[libvirt] [PATCH] virprocess: fix MinGW build and RHEL-5 build

[Pavel Hrdina]

Commit b6a2828e introduced new functions to set process scheduler. There
is a small typo in ELSE path for systems where scheduler is not
available.

Also some of the definitions were introduced later in kernel. For
example RHEL-5 is running on kernel 2.6.18, but SCHED_IDLE was introduces
in 2.6.23 [1] and SCHED_BATCH in 2.6.16 [1]. We should not count only on
existence of function sched_setscheduler(), we must also check for
existence of used macros as they might not be defined.

[1] see 'man 7 sched'

Signed-off-by: Pavel Hrdina <phrdina at redhat.com>
---
 src/util/virprocess.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/util/virprocess.c b/src/util/virprocess.c
index b3e5435..342bf40 100644
--- a/src/util/virprocess.c
+++ b/src/util/virprocess.c
@@ -1062,7 +1062,7 @@ virProcessExitWithStatus(int status)
     exit(value);
 }
 
-#if HAVE_SCHED_SETSCHEDULER
+#if HAVE_SCHED_SETSCHEDULER && defined(SCHED_BATCH) && defined(SCHED_IDLE)
 
 static int
 virProcessSchedTranslatePolicy(virProcessSchedPolicy policy)
@@ -1092,7 +1092,9 @@ virProcessSchedTranslatePolicy(virProcessSchedPolicy policy)
 }
 
 int
-virProcessSetScheduler(pid_t pid, virProcessSchedPolicy policy, int priority)
+virProcessSetScheduler(pid_t pid,
+                       virProcessSchedPolicy policy,
+                       int priority)
 {
     struct sched_param param = {0};
     int pol = virProcessSchedTranslatePolicy(policy);
@@ -1144,7 +1146,7 @@ virProcessSetScheduler(pid_t pid, virProcessSchedPolicy policy, int priority)
 
 int
 virProcessSetScheduler(pid_t pid ATTRIBUTE_UNUSED,
-                       int policy,
+                       virProcessSchedPolicy policy,
                        int priority ATTRIBUTE_UNUSED)
 {
     if (!policy)
-- 
2.0.5