linux-kernel - [tip:smp/hotplug] idle: Implement set/ clr functions for need

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Date:	Mon, 8 Apr 2013 13:10:32 -0700
From:	tip-bot for Thomas Gleixner <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...nel.org,
	rusty@...tcorp.com.au, torvalds@...ux-foundation.org,
	peterz@...radead.org, srivatsa.bhat@...ux.vnet.ibm.com,
	paulmck@...ux.vnet.ibm.com, tglx@...utronix.de,
	magnus.damm@...il.com
Subject: [tip:smp/hotplug] idle: Implement set/
 clr functions for need_resched poll

Commit-ID:  3a98f871ecaf44806e188184332c3fec27c8f08c
Gitweb:     http://git.kernel.org/tip/3a98f871ecaf44806e188184332c3fec27c8f08c
Author:     Thomas Gleixner <tglx@...utronix.de>
AuthorDate: Thu, 21 Mar 2013 22:49:33 +0100
Committer:  Thomas Gleixner <tglx@...utronix.de>
CommitDate: Mon, 8 Apr 2013 17:39:22 +0200

idle: Implement set/clr functions for need_resched poll

Implement set/clear functions for the idle need_resched poll
implementation.

Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Rusty Russell <rusty@...tcorp.com.au>
Cc: Paul McKenney <paulmck@...ux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@...radead.org>
Reviewed-by: Cc: Srivatsa S. Bhat <srivatsa.bhat@...ux.vnet.ibm.com>
Cc: Magnus Damm <magnus.damm@...il.com>
Link: http://lkml.kernel.org/r/20130321215233.518839807@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
---
 include/linux/sched.h | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/include/linux/sched.h b/include/linux/sched.h
index 6709a58..21fe9a1 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -2632,13 +2632,34 @@ static inline int tsk_is_polling(struct task_struct *p)
 {
 	return task_thread_info(p)->status & TS_POLLING;
 }
+static inline void current_set_polling(void)
+{
+	current_thread_info()->status |= TS_POLLING;
+}
+
+static inline void current_clr_polling(void)
+{
+	current_thread_info()->status &= ~TS_POLLING;
+	smp_mb__after_clear_bit();
+}
 #elif defined(TIF_POLLING_NRFLAG)
 static inline int tsk_is_polling(struct task_struct *p)
 {
 	return test_tsk_thread_flag(p, TIF_POLLING_NRFLAG);
 }
+static inline void current_set_polling(void)
+{
+	set_thread_flag(TIF_POLLING_NRFLAG);
+}
+
+static inline void current_clr_polling(void)
+{
+	clear_thread_flag(TIF_POLLING_NRFLAG);
+}
 #else
 static inline int tsk_is_polling(struct task_struct *p) { return 0; }
+static inline void current_set_polling(void) { }
+static inline void current_clr_polling(void) { }
 #endif
 
 /*
--
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