Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761478AbZDBO6C (ORCPT ); Thu, 2 Apr 2009 10:58:02 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1760330AbZDBO5N (ORCPT ); Thu, 2 Apr 2009 10:57:13 -0400 Received: from mga11.intel.com ([192.55.52.93]:37716 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760889AbZDBO5M (ORCPT ); Thu, 2 Apr 2009 10:57:12 -0400 Content-Type: multipart/mixed; boundary="===============0929572262==" MIME-Version: 1.0 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.39,314,1235980800"; d="scan'208";a="678190767" Message-Id: <20090402145704.465495000@intel.com> References: <20090402145455.597376000@intel.com> User-Agent: quilt/0.46-1 Date: Thu, 02 Apr 2009 16:54:57 +0200 From: markus.t.metzger@intel.com To: mingo@elte.hu, tglx@linutronix.de, hpa@zytor.com Cc: markus.t.metzger@gmail.com, roland@redhat.com, eranian@googlemail.com, oleg@redhat.com, juan.villacis@intel.com, ak@linux.jf.intel.com, linux-kernel@vger.kernel.org, Markus Metzger Subject: [patch 02/18] sched: add task_is_running() fucntion to sched.h Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2732 Lines: 89 --===============0929572262== MIME-Version: 1.0 Content-Disposition: inline; filename=tip.master.sched.task_running.patch Add a function to query whether a task is currently running on any cpu. Signed-off-by: Markus Metzger --- include/linux/sched.h | 5 5 + 0 - 0 ! kernel/sched.c | 16 16 + 0 - 0 ! 2 files changed, 21 insertions(+) Index: b/include/linux/sched.h =================================================================== --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -1988,8 +1988,13 @@ extern void set_task_comm(struct task_st extern char *get_task_comm(char *to, struct task_struct *tsk); #ifdef CONFIG_SMP +extern int task_is_running(struct task_struct *p); extern unsigned long wait_task_inactive(struct task_struct *, long match_state); #else +static inline int task_is_running(struct task_struct *p) +{ + return p == current; +} static inline unsigned long wait_task_inactive(struct task_struct *p, long match_state) { Index: b/kernel/sched.c =================================================================== --- a/kernel/sched.c +++ b/kernel/sched.c @@ -1933,6 +1933,22 @@ migrate_task(struct task_struct *p, int } /* + * Is the task currently running on any cpu? + */ +int task_is_running(struct task_struct *p) +{ + struct rq *rq; + unsigned long flags; + int running; + + rq = task_rq_lock(p, &flags); + running = task_running(rq, p); + task_rq_unlock(rq, &flags); + + return running; +} + +/* * wait_task_inactive - wait for a thread to unschedule. * * If @match_state is nonzero, it's the @p->state value just checked and -- --===============0929572262== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Disposition: inline --------------------------------------------------------------------- Intel GmbH Dornacher Strasse 1 85622 Feldkirchen/Muenchen Germany Sitz der Gesellschaft: Feldkirchen bei Muenchen Geschaeftsfuehrer: Douglas Lusk, Peter Gleissner, Hannes Schwaderer Registergericht: Muenchen HRB 47456 Ust.-IdNr. VAT Registration No.: DE129385895 Citibank Frankfurt (BLZ 502 109 00) 600119052 This e-mail and any attachments may contain confidential material for the sole use of the intended recipient(s). Any review or distribution by others is strictly prohibited. If you are not the intended recipient, please contact the sender and delete all copies. --===============0929572262==-- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/