linux-kernel - [ANNOUNCE] 3.8.13-rt14

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Date:	Thu, 11 Jul 2013 09:38:58 +0200
From:	Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:	linux-rt-users <linux-rt-users@...r.kernel.org>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>, rostedt@...dmis.org,
	John Kacur <jkacur@...hat.com>
Subject: [ANNOUNCE] 3.8.13-rt14

Dear RT Folks,

I'm pleased to announce the 3.8.13-rt14 release.

changes since v3.8.13-rt13:
- added a patch from Uwe Kleine-König to fix the UP breakage introduced by
  the recent s/sbin spinlocks/raw_spin_lock/ change.
- added a fix for a livelock of workqueue vs ata-piix. Found by Carsten
  Emde, patch proposed by Thomas Gleixner.

The delta patch against v3.8.13-rt13 is appended below and can be found here:

  https://www.kernel.org/pub/linux/kernel/projects/rt/3.8/incr/patch-3.8.13-rt13-rt14.patch.xz

The RT patch against 3.8.13 can be found here:

  https://www.kernel.org/pub/linux/kernel/projects/rt/3.8/patch-3.8.13-rt14.patch.xz

The split quilt queue is available at:

  https://www.kernel.org/pub/linux/kernel/projects/rt/3.8/patches-3.8.13-rt14.tar.xz

Sebastian

diff --git a/include/linux/list_bl.h b/include/linux/list_bl.h
index ddfd46a..becd7a6 100644
--- a/include/linux/list_bl.h
+++ b/include/linux/list_bl.h
@@ -131,8 +131,10 @@ static inline void hlist_bl_lock(struct hlist_bl_head *b)
 	bit_spin_lock(0, (unsigned long *)b);
 #else
 	raw_spin_lock(&b->lock);
+#if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_SPINLOCK)
 	__set_bit(0, (unsigned long *)b);
 #endif
+#endif
 }
 
 static inline void hlist_bl_unlock(struct hlist_bl_head *b)
@@ -140,7 +142,9 @@ static inline void hlist_bl_unlock(struct hlist_bl_head *b)
 #ifndef CONFIG_PREEMPT_RT_BASE
 	__bit_spin_unlock(0, (unsigned long *)b);
 #else
+#if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_SPINLOCK)
 	__clear_bit(0, (unsigned long *)b);
+#endif
 	raw_spin_unlock(&b->lock);
 #endif
 }
diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 0d49ddf..99855b3 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -42,6 +42,7 @@
 #include <linux/lockdep.h>
 #include <linux/idr.h>
 #include <linux/locallock.h>
+#include <linux/delay.h>
 
 #include "workqueue_sched.h"
 
@@ -1157,7 +1158,7 @@ static int try_to_grab_pending(struct work_struct *work, bool is_dwork,
 	local_unlock_irqrestore(pendingb_lock, *flags);
 	if (work_is_canceling(work))
 		return -ENOENT;
-	cpu_relax();
+	cpu_chill();
 	return -EAGAIN;
 }
 
diff --git a/localversion-rt b/localversion-rt
index 9f7d0bd..08b3e75 100644
--- a/localversion-rt
+++ b/localversion-rt
@@ -1 +1 @@
--rt13
+-rt14
--
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