patches-3.10.17-rt12.tar.xzv3.10.17-rt12

md5sum:
d387c7b152a5a76215b4e3bd6b2af1ad  patches-3.10.17-rt12.tar.xz

Announce:
 -----------------
 Dear RT folks!

 I'm pleased to announce the v3.10.17-rt12 patch set.

 This is only a stable update (which fixed the livelock in sem_lock()).

 Known issues:

       - SLAB support not working

       - The cpsw network driver shows some issues.

       - bcache is disabled.

       - an ancient race (since we got sleeping spinlocks) where the
         TASK_TRACED state is temporary replaced while waiting on a rw
         lock and the task can't be traced.

 The RT patch against 3.10.17 can be found here:

    https://www.kernel.org/pub/linux/kernel/projects/rt/3.10/patch-3.10.17-rt12.patch.xz

 The split quilt queue is available at:

    https://www.kernel.org/pub/linux/kernel/projects/rt/3.10/patches-3.10.17-rt12.tar.xz

 Sebastian
 -----------------

http://marc.info/?l=linux-rt-users&m=138299989520258&w=2

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>

6 files changed, 40 insertions, 64 deletions

diff --git a/patches/ipc-sem-rework-semaphore-wakeups.patch b/patches/ipc-sem-rework-semaphore-wakeups.patch
index fc51db1..1312838 100644
--- a/patches/ipc-sem-rework-semaphore-wakeups.patch
+++ b/patches/ipc-sem-rework-semaphore-wakeups.patch
@@ -33,16 +33,7 @@ Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
 
 --- a/ipc/sem.c
 +++ b/ipc/sem.c
-@@ -155,7 +155,7 @@ static int sysvipc_sem_proc_show(struct
-  *	sem_array.sem_pending{,last},
-  *	sem_array.sem_undo: sem_lock() for read/write
-  *	sem_undo.proc_next: only "current" is allowed to read/write that field.
-- *	
-+ *
-  */
- 
- #define sc_semmsl	sem_ctls[0]
-@@ -498,7 +498,7 @@ static int try_atomic_semop (struct sem_
+@@ -607,7 +607,7 @@ static int perform_atomic_semop(struct s
  		curr = sma->sem_base + sop->sem_num;
  		sem_op = sop->sem_op;
  		result = curr->semval;
@@ -51,7 +42,7 @@ Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
  		if (!sem_op && result)
  			goto would_block;
  
-@@ -525,7 +525,7 @@ static int try_atomic_semop (struct sem_
+@@ -634,7 +634,7 @@ static int perform_atomic_semop(struct s
  			un->semadj[sop->sem_num] -= sop->sem_op;
  		sop--;
  	}
@@ -60,7 +51,7 @@ Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
  	return 0;
  
  out_of_range:
-@@ -557,6 +557,13 @@ undo:
+@@ -666,6 +666,13 @@ undo:
  static void wake_up_sem_queue_prepare(struct list_head *pt,
  				struct sem_queue *q, int error)
  {
@@ -74,7 +65,7 @@ Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
  	if (list_empty(pt)) {
  		/*
  		 * Hold preempt off so that we don't get preempted and have the
-@@ -568,6 +575,7 @@ static void wake_up_sem_queue_prepare(st
+@@ -677,6 +684,7 @@ static void wake_up_sem_queue_prepare(st
  	q->pid = error;
  
  	list_add_tail(&q->list, pt);
@@ -82,7 +73,7 @@ Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
  }
  
  /**
-@@ -581,6 +589,7 @@ static void wake_up_sem_queue_prepare(st
+@@ -690,6 +698,7 @@ static void wake_up_sem_queue_prepare(st
   */
  static void wake_up_sem_queue_do(struct list_head *pt)
  {
@@ -90,7 +81,7 @@ Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
  	struct sem_queue *q, *t;
  	int did_something;
  
-@@ -593,6 +602,7 @@ static void wake_up_sem_queue_do(struct
+@@ -702,6 +711,7 @@ static void wake_up_sem_queue_do(struct
  	}
  	if (did_something)
  		preempt_enable();
@@ -98,7 +89,7 @@ Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
  }
  
  static void unlink_queue(struct sem_array *sma, struct sem_queue *q)
-@@ -947,7 +957,7 @@ static int semctl_nolock(struct ipc_name
+@@ -1161,7 +1171,7 @@ static int semctl_nolock(struct ipc_name
  		err = security_sem_semctl(NULL, cmd);
  		if (err)
  			return err;
@@ -107,16 +98,7 @@ Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
  		memset(&seminfo,0,sizeof(seminfo));
  		seminfo.semmni = ns->sc_semmni;
  		seminfo.semmns = ns->sc_semmns;
-@@ -967,7 +977,7 @@ static int semctl_nolock(struct ipc_name
- 		}
- 		max_id = ipc_get_maxid(&sem_ids(ns));
- 		up_read(&sem_ids(ns).rw_mutex);
--		if (copy_to_user(p, &seminfo, sizeof(struct seminfo))) 
-+		if (copy_to_user(p, &seminfo, sizeof(struct seminfo)))
- 			return -EFAULT;
- 		return (max_id < 0) ? 0: max_id;
- 	}
-@@ -1642,7 +1652,7 @@ SYSCALL_DEFINE4(semtimedop, int, semid,
+@@ -1865,7 +1875,7 @@ SYSCALL_DEFINE4(semtimedop, int, semid,
  	/* We need to sleep on this operation, so we put the current
  	 * task into the pending queue and go to sleep.
  	 */
@@ -125,7 +107,7 @@ Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
  	queue.sops = sops;
  	queue.nsops = nsops;
  	queue.undo = un;
-@@ -1765,7 +1775,7 @@ int copy_semundo(unsigned long clone_fla
+@@ -2000,7 +2010,7 @@ int copy_semundo(unsigned long clone_fla
  			return error;
  		atomic_inc(&undo_list->refcnt);
  		tsk->sysvsem.undo_list = undo_list;
diff --git a/patches/localversion.patch b/patches/localversion.patch
index 4e59cb4..6e5d965 100644
--- a/patches/localversion.patch
+++ b/patches/localversion.patch
@@ -12,4 +12,4 @@ Link: http://lkml.kernel.org/n/tip-8vdw4bfcsds27cvox6rpb334@git.kernel.org
 --- /dev/null
 +++ b/localversion-rt
 @@ -0,0 +1 @@
-+-rt11
++-rt12
diff --git a/patches/posix-timers-thread-posix-cpu-timers-on-rt.patch b/patches/posix-timers-thread-posix-cpu-timers-on-rt.patch
index 77f29e9..9aeedb3 100644
--- a/patches/posix-timers-thread-posix-cpu-timers-on-rt.patch
+++ b/patches/posix-timers-thread-posix-cpu-timers-on-rt.patch
@@ -43,7 +43,7 @@ Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
  		[PIDTYPE_PGID] = INIT_PID_LINK(PIDTYPE_PGID),		\
 --- a/include/linux/sched.h
 +++ b/include/linux/sched.h
-@@ -1186,6 +1186,9 @@ struct task_struct {
+@@ -1185,6 +1185,9 @@ struct task_struct {
  
  	struct task_cputime cputime_expires;
  	struct list_head cpu_timers[3];
@@ -55,19 +55,10 @@ Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
  	const struct cred __rcu *real_cred; /* objective and real subjective task
 --- a/init/main.c
 +++ b/init/main.c
-@@ -6,7 +6,7 @@
-  *  GK 2/5/95  -  Changed to support mounting root fs via NFS
-  *  Added initrd & change_root: Werner Almesberger & Hans Lermen, Feb '96
-  *  Moan early if gcc is old, avoiding bogus kernels - Paul Gortmaker, May '96
-- *  Simplified starting of init:  Michael A. Griffith <grif@acm.org> 
-+ *  Simplified starting of init:  Michael A. Griffith <grif@acm.org>
-  */
- 
- #define DEBUG		/* Enable initcall_debug */
-@@ -74,6 +74,7 @@
- #include <linux/ptrace.h>
+@@ -75,6 +75,7 @@
  #include <linux/blkdev.h>
  #include <linux/elevator.h>
+ #include <linux/random.h>
 +#include <linux/posix-timers.h>
  
  #include <asm/io.h>
diff --git a/patches/series b/patches/series
index 801eb95..e00c7e4 100644
--- a/patches/series
+++ b/patches/series
@@ -6,7 +6,6 @@
 # UPSTREAM changes queued
 ############################################################
 hpsa-fix-warning-with-smp_processor_id-in-preemptibl.patch
-sparc64-Remove-RWSEM-export-leftovers.patch
 genirq-Set-irq-thread-to-RT-priority-on-creation.patch
 
 ############################################################
diff --git a/patches/softirq-local-lock.patch b/patches/softirq-local-lock.patch
index 5c496a8..3ae98c1 100644
--- a/patches/softirq-local-lock.patch
+++ b/patches/softirq-local-lock.patch
@@ -84,7 +84,7 @@ Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
   *
 --- a/include/linux/sched.h
 +++ b/include/linux/sched.h
-@@ -1448,6 +1448,7 @@ struct task_struct {
+@@ -1447,6 +1447,7 @@ struct task_struct {
  #endif
  #ifdef CONFIG_PREEMPT_RT_BASE
  	struct rcu_head put_rcu;
@@ -94,7 +94,7 @@ Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
  
 --- a/init/main.c
 +++ b/init/main.c
-@@ -496,6 +496,7 @@ asmlinkage void __init start_kernel(void
+@@ -497,6 +497,7 @@ asmlinkage void __init start_kernel(void
   * Interrupts are still disabled. Do necessary setups, then
   * enable them
   */
@@ -295,15 +295,18 @@ Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
  	}
  
  	__irq_enter();
-@@ -391,10 +549,14 @@ void irq_enter(void)
+@@ -391,6 +549,7 @@ void irq_enter(void)
  
  static inline void invoke_softirq(void)
  {
 +#ifndef CONFIG_PREEMPT_RT_FULL
- 	if (!force_irqthreads)
- 		__do_softirq();
- 	else
+ 	if (!force_irqthreads) {
+ 		/*
+ 		 * We can safely execute softirq on the current stack if
+@@ -404,6 +563,9 @@ static inline void invoke_softirq(void)
+ 	} else {
  		wakeup_softirqd();
+ 	}
 +#else
 +		wakeup_softirqd();
 +#endif
diff --git a/patches/softirq-split-locks.patch b/patches/softirq-split-locks.patch
index db7ede3..250cd67 100644
--- a/patches/softirq-split-locks.patch
+++ b/patches/softirq-split-locks.patch
@@ -30,7 +30,7 @@ Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
 
 --- a/include/linux/sched.h
 +++ b/include/linux/sched.h
-@@ -1450,6 +1450,7 @@ struct task_struct {
+@@ -1449,6 +1449,7 @@ struct task_struct {
  #ifdef CONFIG_PREEMPT_RT_BASE
  	struct rcu_head put_rcu;
  	int softirq_nestcnt;
@@ -116,17 +116,17 @@ Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
   */
 -static DEFINE_LOCAL_IRQ_LOCK(local_softirq_lock);
 +static DEFINE_PER_CPU(struct local_irq_lock [NR_SOFTIRQS], local_softirq_locks);
- 
--static void __do_softirq_common(int need_rcu_bh_qs);
++
 +void __init softirq_early_init(void)
 +{
 +	int i;
  
--void __do_softirq(void)
+-static void __do_softirq_common(int need_rcu_bh_qs);
 +	for (i = 0; i < NR_SOFTIRQS; i++)
 +		local_irq_lock_init(local_softirq_locks[i]);
 +}
-+
+ 
+-void __do_softirq(void)
 +static void lock_softirq(int which)
  {
 -	__do_softirq_common(0);
@@ -135,13 +135,13 @@ Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
  
 -void __init softirq_early_init(void)
 +static void unlock_softirq(int which)
- {
--	local_irq_lock_init(local_softirq_lock);
++{
 +	__local_unlock(&__get_cpu_var(local_softirq_locks[which]));
 +}
 +
 +static void do_single_softirq(int which, int need_rcu_bh_qs)
-+{
+ {
+-	local_irq_lock_init(local_softirq_lock);
 +	unsigned long old_flags = current->flags;
 +
 +	current->flags &= ~PF_MEMALLOC;
@@ -261,7 +261,7 @@ Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
 + * disabled. So the cpu can't go away under us.
 + */
 +void thread_do_softirq(void)
-+{
+ {
 +	if (!in_serving_softirq() && current->softirqs_raised) {
 +		current->softirq_nestcnt++;
 +		do_current_softirqs(0);
@@ -270,7 +270,7 @@ Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
 +}
 +
 +void __raise_softirq_irqoff(unsigned int nr)
- {
++{
 +	trace_softirq_raise(nr);
 +	or_softirq_pending(1UL << nr);
 +
@@ -371,23 +371,24 @@ Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
  }
  
  static inline void ksoftirqd_clr_sched_params(unsigned int cpu, bool online)
-@@ -574,8 +670,14 @@ static inline void invoke_softirq(void)
- 		__do_softirq();
- 	else
+@@ -583,8 +679,15 @@ static inline void invoke_softirq(void)
+ 	} else {
  		wakeup_softirqd();
+ 	}
 -#else
 +#else /* PREEMPT_RT_FULL */
 +	unsigned long flags;
 +
 +	local_irq_save(flags);
 +	if (__this_cpu_read(ksoftirqd) &&
-+	    __this_cpu_read(ksoftirqd)->softirqs_raised)
++			__this_cpu_read(ksoftirqd)->softirqs_raised)
++
  		wakeup_softirqd();
 +	local_irq_restore(flags);
  #endif
  }
  
-@@ -613,26 +715,6 @@ void irq_exit(void)
+@@ -622,26 +725,6 @@ void irq_exit(void)
  	rcu_irq_exit();
  }
  
@@ -414,7 +415,7 @@ Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
  void raise_softirq(unsigned int nr)
  {
  	unsigned long flags;
-@@ -642,12 +724,6 @@ void raise_softirq(unsigned int nr)
+@@ -651,12 +734,6 @@ void raise_softirq(unsigned int nr)
  	local_irq_restore(flags);
  }
  
@@ -427,7 +428,7 @@ Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
  void open_softirq(int nr, void (*action)(struct softirq_action *))
  {
  	softirq_vec[nr].action = action;
-@@ -1091,20 +1167,7 @@ EXPORT_SYMBOL(tasklet_unlock_wait);
+@@ -1100,20 +1177,7 @@ EXPORT_SYMBOL(tasklet_unlock_wait);
  
  static int ksoftirqd_should_run(unsigned int cpu)
  {