linux-kernel - [tip:sched/core] sched: Hide runqueues from direct reference at source code level for __raw_get_cpu

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Message-ID: <tip-54d35f29f49224d86b994acb6e5969b9ba09022d@git.kernel.org>
Date:	Mon, 29 Jun 2009 07:24:48 GMT
From:	tip-bot for Hitoshi Mitake <mitake@....info.waseda.ac.jp>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...hat.com,
	mitake@....info.waseda.ac.jp, tglx@...utronix.de, mingo@...e.hu
Subject: [tip:sched/core] sched: Hide runqueues from direct reference at source code level for __raw_get_cpu_var()

Commit-ID:  54d35f29f49224d86b994acb6e5969b9ba09022d
Gitweb:     http://git.kernel.org/tip/54d35f29f49224d86b994acb6e5969b9ba09022d
Author:     Hitoshi Mitake <mitake@....info.waseda.ac.jp>
AuthorDate: Mon, 29 Jun 2009 14:44:57 +0900
Committer:  Ingo Molnar <mingo@...e.hu>
CommitDate: Mon, 29 Jun 2009 09:19:27 +0200

sched: Hide runqueues from direct reference at source code level for __raw_get_cpu_var()

Hide __raw_get_cpu_var() as well - thus all the direct
references to runqueues will abstracted out.

Signed-off-by: Hitoshi Mitake <mitake@....info.waseda.ac.jp>
LKML-Reference: <20090629.144457.886429910353660979.mitake@....info.waseda.ac.jp>
Signed-off-by: Ingo Molnar <mingo@...e.hu>


---
 kernel/sched.c |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/kernel/sched.c b/kernel/sched.c
index 168b268..ebc5151 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -692,6 +692,7 @@ static inline int cpu_of(struct rq *rq)
 #define this_rq()		(&__get_cpu_var(runqueues))
 #define task_rq(p)		cpu_rq(task_cpu(p))
 #define cpu_curr(cpu)		(cpu_rq(cpu)->curr)
+#define raw_rq()		(&__raw_get_cpu_var(runqueues))
 
 inline void update_rq_clock(struct rq *rq)
 {
@@ -6669,7 +6670,7 @@ EXPORT_SYMBOL(yield);
  */
 void __sched io_schedule(void)
 {
-	struct rq *rq = &__raw_get_cpu_var(runqueues);
+	struct rq *rq = raw_rq();
 
 	delayacct_blkio_start();
 	atomic_inc(&rq->nr_iowait);
@@ -6681,7 +6682,7 @@ EXPORT_SYMBOL(io_schedule);
 
 long __sched io_schedule_timeout(long timeout)
 {
-	struct rq *rq = &__raw_get_cpu_var(runqueues);
+	struct rq *rq = raw_rq();
 	long ret;
 
 	delayacct_blkio_start();
--
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