linux-kernel - [PATCH 5/9] RT: Wrap the RQ notion of priority to make it conditional

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Message-ID: <20071024135259.7960.18676.stgit@novell1.haskins.net>
Date:	Wed, 24 Oct 2007 09:52:59 -0400
From:	Gregory Haskins <ghaskins@...ell.com>
To:	linux-rt-users@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org,
	Gregory Haskins <ghaskins@...ell.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Dmitry Adamushko <dmitry.adamushko@...il.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Ingo Molnar <mingo@...e.hu>, Darren Hart <dvhltc@...ibm.com>
Subject: [PATCH 5/9] RT: Wrap the RQ notion of priority to make it conditional

A little cleanup to avoid #ifdef proliferation later in the series

Signed-off-by: Gregory Haskins <ghaskins@...ell.com>
---

 kernel/sched.c |   18 +++++++++++++++---
 1 files changed, 15 insertions(+), 3 deletions(-)

diff --git a/kernel/sched.c b/kernel/sched.c
index 7b9b481..ce5292f 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -365,6 +365,16 @@ struct rq {
 static DEFINE_PER_CPU_SHARED_ALIGNED(struct rq, runqueues);
 static DEFINE_MUTEX(sched_hotcpu_mutex);
 
+#if defined(CONFIG_PREEMPT_RT) && defined(CONFIG_SMP)
+static inline void set_rq_prio(struct rq *rq, int prio)
+{
+	rq->curr_prio = prio;
+}
+
+#else
+#define set_rq_prio(rq, prio) do { } while(0)
+#endif
+
 static inline void check_preempt_curr(struct rq *rq, struct task_struct *p)
 {
 	rq->curr->sched_class->check_preempt_curr(rq, p);
@@ -2326,9 +2336,9 @@ static inline void finish_task_switch(struct rq *rq, struct task_struct *prev)
 	 */
 	prev_state = prev->state;
 	_finish_arch_switch(prev);
-#if defined(CONFIG_PREEMPT_RT) && defined(CONFIG_SMP)
-	rq->curr_prio = current->prio;
-#endif
+
+	set_rq_prio(rq, current->prio);
+
 	finish_lock_switch(rq, prev);
 #if defined(CONFIG_PREEMPT_RT) && defined(CONFIG_SMP)
 	/*
@@ -7383,6 +7393,8 @@ void __init sched_init(void)
 		highest_cpu = i;
 		/* delimiter for bitsearch: */
 		__set_bit(MAX_RT_PRIO, array->bitmap);
+
+		set_rq_prio(rq, MAX_PRIO);
 	}
 
 	set_load_weight(&init_task);

-
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