[tip:sched/urgent] sched/core: Fix sched_rt_global_validate

[tip-bot for Juri Lelli <tipbot@zytor.com>]

Commit-ID:  e9e7cb38c21c80c82af4b16608bb4c8c5ec6a28e
Gitweb:     http://git.kernel.org/tip/e9e7cb38c21c80c82af4b16608bb4c8c5ec6a28e
Author:     Juri Lelli <juri.lelli@gmail.com>
AuthorDate: Tue, 11 Feb 2014 09:24:26 +0100
Committer:  Thomas Gleixner <tglx@linutronix.de>
CommitDate: Fri, 21 Feb 2014 21:27:10 +0100

sched/core: Fix sched_rt_global_validate

Don't compare sysctl_sched_rt_runtime against sysctl_sched_rt_period if
the former is equal to RUNTIME_INF, otherwise disabling -rt bandwidth
management (with CONFIG_RT_GROUP_SCHED=n) fails.

Cc: Ingo Molnar <mingo@redhat.com>
Signed-off-by: Juri Lelli <juri.lelli@gmail.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1392107067-19907-2-git-send-email-juri.lelli@gmail.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
 kernel/sched/core.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 2491448..98d33c1 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -7475,7 +7475,8 @@ static int sched_rt_global_validate(void)
 	if (sysctl_sched_rt_period <= 0)
 		return -EINVAL;
 
-	if (sysctl_sched_rt_runtime > sysctl_sched_rt_period)
+	if ((sysctl_sched_rt_runtime != RUNTIME_INF) &&
+		(sysctl_sched_rt_runtime > sysctl_sched_rt_period))
 		return -EINVAL;
 
 	return 0;