linux-kernel - [PATCH -repost 08/21] kgr: sched.h, introduce kgr_task

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Message-Id: <1403694435-3180-8-git-send-email-jslaby@suse.cz>
Date:	Wed, 25 Jun 2014 13:07:02 +0200
From:	Jiri Slaby <jslaby@...e.cz>
To:	linux-kernel@...r.kernel.org
Cc:	tj@...nel.org, rostedt@...dmis.org, mingo@...hat.com,
	akpm@...ux-foundation.org, andi@...stfloor.org,
	paulmck@...ux.vnet.ibm.com, pavel@....cz, jirislaby@...il.com,
	Vojtech Pavlik <vojtech@...e.cz>, Michael Matz <matz@...e.de>,
	Jiri Kosina <jkosina@...e.cz>, Jiri Slaby <jslaby@...e.cz>,
	Frederic Weisbecker <fweisbec@...il.com>
Subject: [PATCH -repost 08/21] kgr: sched.h, introduce kgr_task_safe helper

To be used from some kthreads.

Signed-off-by: Jiri Slaby <jslaby@...e.cz>
Cc: Steven Rostedt <rostedt@...dmis.org>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Ingo Molnar <mingo@...hat.com>
---
 include/linux/sched.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/include/linux/sched.h b/include/linux/sched.h
index 306f4f0c987a..6bc2d63a59c4 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -2974,6 +2974,15 @@ static inline void mm_init_owner(struct mm_struct *mm, struct task_struct *p)
 }
 #endif /* CONFIG_MEMCG */
 
+#if IS_ENABLED(CONFIG_KGRAFT)
+static inline void kgr_task_safe(struct task_struct *p)
+{
+	clear_bit(0, &task_thread_info(p)->kgr_in_progress);
+}
+#else
+static inline void kgr_task_safe(struct task_struct *p) { }
+#endif /* IS_ENABLED(CONFIG_KGRAFT) */
+
 static inline unsigned long task_rlimit(const struct task_struct *tsk,
 		unsigned int limit)
 {
-- 
2.0.0

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