linux-kernel - [PATCH] sched: Hide runqueues from direct refer at source code level for __raw_get_cpu

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Message-Id: <20090629.144457.886429910353660979.mitake@dcl.info.waseda.ac.jp>
Date:	Mon, 29 Jun 2009 14:44:57 +0900 (JST)
From:	Hitoshi Mitake <mitake@....info.waseda.ac.jp>
To:	mingo@...e.hu
Cc:	mingo@...hat.com, hpa@...or.com, linux-kernel@...r.kernel.org,
	tglx@...utronix.de, linux-tip-commits@...r.kernel.org
Subject: [PATCH] sched: Hide runqueues from direct refer at source code
 level for __raw_get_cpu_var()


description:

My previous patch (Commit-ID of tip tree d11ad9b3631b942b0d2e5b754a6c62158efb799f) hides
direct refers at source code level into macros.
This will hide the rest part, __raw_get_cpu_var().
After appling this, all of the direct refer to runqueues will be in macros in the close place.

Signed-off-by: Hitoshi Mitake <mitake@....info.waseda.ac.jp>

diff --git a/kernel/sched.c b/kernel/sched.c
index 7c9098d..d1d3599 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)
 {
@@ -6631,7 +6632,7 @@ 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);
@@ -6643,7 +6644,7 @@ 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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