* sysdeps/powerpc/powerpc32/dl-trampoline.S (_dl_runtime_resolve):

	Don't clobber caller's LRSAVE.
	(_dl_prof_resolve): Likewise.

23 files changed, 1235 insertions, 37 deletions

diff --git a/nptl/ChangeLog b/nptl/ChangeLog
index 8e156c5299..4b5b094091 100644
--- a/nptl/ChangeLog
+++ b/nptl/ChangeLog
@@ -1,3 +1,42 @@
+2006-08-14  Jakub Jelinek  <jakub@redhat.com>
+
+	* sysdeps/unix/sysv/linux/bits/posix_opt.h
+	(_POSIX_THREAD_PRIO_PROTECT): Define to 200112L.
+	* descr.h (struct priority_protection_data): New type.
+	(struct pthread): Add tpp field.
+	* pthreadP.h (PTHREAD_MUTEX_PP_NORMAL_NP,
+	PTHREAD_MUTEX_PP_RECURSIVE_NP, PTHREAD_MUTEX_PP_ERRORCHECK_NP,
+	PTHREAD_MUTEX_PP_ADAPTIVE_NP): New enum values.
+	* pthread_mutex_init.c (__pthread_mutex_init): Handle non-robust
+	TPP mutexes.
+	* pthread_mutex_lock.c (__pthread_mutex_lock): Handle TPP mutexes.
+	* pthread_mutex_trylock.c (__pthread_mutex_trylock): Likewise.
+	* pthread_mutex_timedlock.c (pthread_mutex_timedlock): Likewise.
+	* pthread_mutex_unlock.c (__pthread_mutex_unlock_usercnt): Likewise.
+	* tpp.c: New file.
+	* pthread_setschedparam.c (__pthread_setschedparam): Handle priority
+	boosted by TPP.
+	* pthread_setschedprio.c (pthread_setschedprio): Likewise.
+	* pthread_mutexattr_getprioceiling.c
+	(pthread_mutexattr_getprioceiling): If ceiling is 0, ensure it is
+	in the SCHED_FIFO priority range.
+	* pthread_mutexattr_setprioceiling.c
+	(pthread_mutexattr_setprioceiling): Fix prioceiling validation.
+	* pthread_mutex_getprioceiling.c (pthread_mutex_getprioceiling): Fail
+	if mutex is not TPP.  Ceiling is now in __data.__lock.
+	* pthread_mutex_setprioceiling.c: Include stdbool.h.
+	(pthread_mutex_setprioceiling): Fix prioceiling validation.  Ceiling
+	is now in __data.__lock.  Add locking.
+	* pthread_create.c (__free_tcb): Free pd->tpp structure.
+	* Makefile (libpthread-routines): Add tpp.
+	(xtests): Add tst-mutexpp1, tst-mutexpp6 and tst-mutexpp10.
+	* tst-tpp.h: New file.
+	* tst-mutexpp1.c: New file.
+	* tst-mutexpp6.c: New file.
+	* tst-mutexpp10.c: New file.
+	* tst-mutex1.c (TEST_FUNCTION): Don't redefine if already defined.
+	* tst-mutex6.c (TEST_FUNCTION): Likewise.
+
 2006-08-12  Ulrich Drepper  <drepper@redhat.com>
 
 	[BZ #2843]
diff --git a/nptl/descr.h b/nptl/descr.h
index 607aa9fcdb..7acd2f4f22 100644
--- a/nptl/descr.h
+++ b/nptl/descr.h
@@ -111,6 +111,14 @@ struct robust_list_head
 };
 
 
+/* Data strcture used to handle thread priority protection.  */
+struct priority_protection_data
+{
+  int priomax;
+  unsigned int priomap[];
+};
+
+
 /* Thread descriptor data structure.  */
 struct pthread
 {
@@ -343,6 +351,9 @@ struct pthread
   /* This is what the user specified and what we will report.  */
   size_t reported_guardsize;
 
+  /* Thread Priority Protection data.  */
+  struct priority_protection_data *tpp;
+
   /* Resolver state.  */
   struct __res_state res;
 
diff --git a/nptl/pthreadP.h b/nptl/pthreadP.h
index dc98bb19c0..503e99b2b4 100644
--- a/nptl/pthreadP.h
+++ b/nptl/pthreadP.h
@@ -86,17 +86,31 @@ enum
   = PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_ROBUST_ERRORCHECK_NP,
   PTHREAD_MUTEX_PI_ROBUST_ADAPTIVE_NP
   = PTHREAD_MUTEX_PRIO_INHERIT_NP | PTHREAD_MUTEX_ROBUST_ADAPTIVE_NP,
-  PTHREAD_MUTEX_PRIO_PROTECT_NP = 64
+  PTHREAD_MUTEX_PRIO_PROTECT_NP = 64,
+  PTHREAD_MUTEX_PP_NORMAL_NP
+  = PTHREAD_MUTEX_PRIO_PROTECT_NP | PTHREAD_MUTEX_NORMAL,
+  PTHREAD_MUTEX_PP_RECURSIVE_NP
+  = PTHREAD_MUTEX_PRIO_PROTECT_NP | PTHREAD_MUTEX_RECURSIVE_NP,
+  PTHREAD_MUTEX_PP_ERRORCHECK_NP
+  = PTHREAD_MUTEX_PRIO_PROTECT_NP | PTHREAD_MUTEX_ERRORCHECK_NP,
+  PTHREAD_MUTEX_PP_ADAPTIVE_NP
+  = PTHREAD_MUTEX_PRIO_PROTECT_NP | PTHREAD_MUTEX_ADAPTIVE_NP
 };
-#define PTHREAD_MUTEX_PRIO_CEILING_SHIFT	16
-#define PTHREAD_MUTEX_PRIO_CEILING_MASK		0x00ff0000
+
+/* Ceiling in __data.__lock.  __data.__lock is signed, so don't
+   use the MSB bit in there, but in the mask also include that bit,
+   so that the compiler can optimize & PTHREAD_MUTEX_PRIO_CEILING_MASK
+   masking if the value is then shifted down by
+   PTHREAD_MUTEX_PRIO_CEILING_SHIFT.  */
+#define PTHREAD_MUTEX_PRIO_CEILING_SHIFT	19
+#define PTHREAD_MUTEX_PRIO_CEILING_MASK		0xfff80000
 
 
 /* Flags in mutex attr.  */
 #define PTHREAD_MUTEXATTR_PROTOCOL_SHIFT	28
 #define PTHREAD_MUTEXATTR_PROTOCOL_MASK		0x30000000
-#define PTHREAD_MUTEXATTR_PRIO_CEILING_SHIFT	16
-#define PTHREAD_MUTEXATTR_PRIO_CEILING_MASK	0x00ff0000
+#define PTHREAD_MUTEXATTR_PRIO_CEILING_SHIFT	12
+#define PTHREAD_MUTEXATTR_PRIO_CEILING_MASK	0x00fff000
 #define PTHREAD_MUTEXATTR_FLAG_ROBUST		0x40000000
 #define PTHREAD_MUTEXATTR_FLAG_PSHARED		0x80000000
 #define PTHREAD_MUTEXATTR_FLAG_BITS \
@@ -151,6 +165,14 @@ extern unsigned int __nptl_nthreads attribute_hidden;
 extern int __set_robust_list_avail attribute_hidden;
 #endif
 
+/* Thread Priority Protection.  */
+extern int __sched_fifo_min_prio attribute_hidden;
+extern int __sched_fifo_max_prio attribute_hidden;
+extern void __init_sched_fifo_prio (void) attribute_hidden;
+extern int __pthread_tpp_change_priority (int prev_prio, int new_prio)
+     attribute_hidden;
+extern int __pthread_current_priority (void) attribute_hidden;
+
 /* The library can run in debugging mode where it performs a lot more
    tests.  */
 extern int __pthread_debug attribute_hidden;
diff --git a/nptl/pthread_create.c b/nptl/pthread_create.c
index c1ac199bb9..315722643b 100644
--- a/nptl/pthread_create.c
+++ b/nptl/pthread_create.c
@@ -206,6 +206,15 @@ __free_tcb (struct pthread *pd)
 	   running thread is gone.  */
 	abort ();
 
+      /* Free TPP data.  */
+      if (__builtin_expect (pd->tpp != NULL, 0))
+	{
+	  struct priority_protection_data *tpp = pd->tpp;
+
+	  pd->tpp = NULL;
+	  free (tpp);
+	}
+
       /* Queue the stack memory block for reuse and exit the process.  The
 	 kernel will signal via writing to the address returned by
 	 QUEUE-STACK when the stack is available.  */
diff --git a/nptl/pthread_mutex_getprioceiling.c b/nptl/pthread_mutex_getprioceiling.c
index 4d1bc28431..1ce5eaebef 100644
--- a/nptl/pthread_mutex_getprioceiling.c
+++ b/nptl/pthread_mutex_getprioceiling.c
@@ -18,6 +18,7 @@
    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
    02111-1307 USA.  */
 
+#include <errno.h>
 #include <pthreadP.h>
 
 
@@ -26,7 +27,11 @@ pthread_mutex_getprioceiling (mutex, prioceiling)
      const pthread_mutex_t *mutex;
      int *prioceiling;
 {
-  *prioceiling = (mutex->__data.__kind & PTHREAD_MUTEX_PRIO_CEILING_MASK)
+  if (__builtin_expect ((mutex->__data.__kind
+			 & PTHREAD_MUTEX_PRIO_PROTECT_NP) == 0, 0))
+    return EINVAL;
+
+  *prioceiling = (mutex->__data.__lock & PTHREAD_MUTEX_PRIO_CEILING_MASK)
 		 >> PTHREAD_MUTEX_PRIO_CEILING_SHIFT;
 
   return 0;
diff --git a/nptl/pthread_mutex_init.c b/nptl/pthread_mutex_init.c
index 6ceca86052..96f1fb00f8 100644
--- a/nptl/pthread_mutex_init.c
+++ b/nptl/pthread_mutex_init.c
@@ -46,7 +46,6 @@ __pthread_mutex_init (mutex, mutexattr)
   imutexattr = (const struct pthread_mutexattr *) mutexattr ?: &default_attr;
 
   /* Sanity checks.  */
-  // XXX For now we don't support priority protected mutexes.
   switch (__builtin_expect (imutexattr->mutexkind
 			    & PTHREAD_MUTEXATTR_PROTOCOL_MASK,
 			    PTHREAD_PRIO_NONE
@@ -72,7 +71,10 @@ __pthread_mutex_init (mutex, mutexattr)
       break;
 
     default:
-      return ENOTSUP;
+      /* XXX: For now we don't support robust priority protected mutexes.  */
+      if (imutexattr->mutexkind & PTHREAD_MUTEXATTR_FLAG_ROBUST)
+	return ENOTSUP;
+      break;
     }
 
   /* Clear the whole variable.  */
@@ -100,15 +102,18 @@ __pthread_mutex_init (mutex, mutexattr)
 
     case PTHREAD_PRIO_PROTECT << PTHREAD_MUTEXATTR_PROTOCOL_SHIFT:
       mutex->__data.__kind |= PTHREAD_MUTEX_PRIO_PROTECT_NP;
-      if (PTHREAD_MUTEX_PRIO_CEILING_MASK
-	  == PTHREAD_MUTEXATTR_PRIO_CEILING_MASK)
-	mutex->__data.__kind |= (imutexattr->mutexkind
-				 & PTHREAD_MUTEXATTR_PRIO_CEILING_MASK);
-      else
-	mutex->__data.__kind |= ((imutexattr->mutexkind
-				  & PTHREAD_MUTEXATTR_PRIO_CEILING_MASK)
-				 >> PTHREAD_MUTEXATTR_PRIO_CEILING_SHIFT)
-				<< PTHREAD_MUTEX_PRIO_CEILING_SHIFT;
+
+      int ceiling = (imutexattr->mutexkind
+		     & PTHREAD_MUTEXATTR_PRIO_CEILING_MASK)
+		    >> PTHREAD_MUTEXATTR_PRIO_CEILING_SHIFT;
+      if (! ceiling)
+	{
+	  if (__sched_fifo_min_prio == -1)
+	    __init_sched_fifo_prio ();
+	  if (ceiling < __sched_fifo_min_prio)
+	    ceiling = __sched_fifo_min_prio;
+	}
+      mutex->__data.__lock = ceiling << PTHREAD_MUTEX_PRIO_CEILING_SHIFT;
       break;
 
     default:
diff --git a/nptl/pthread_mutex_lock.c b/nptl/pthread_mutex_lock.c
index a19c907695..52cc47f4cc 100644
--- a/nptl/pthread_mutex_lock.c
+++ b/nptl/pthread_mutex_lock.c
@@ -335,6 +335,90 @@ __pthread_mutex_lock (mutex)
       }
       break;
 
+    case PTHREAD_MUTEX_PP_RECURSIVE_NP:
+    case PTHREAD_MUTEX_PP_ERRORCHECK_NP:
+    case PTHREAD_MUTEX_PP_NORMAL_NP:
+    case PTHREAD_MUTEX_PP_ADAPTIVE_NP:
+      {
+	int kind = mutex->__data.__kind & PTHREAD_MUTEX_KIND_MASK_NP;
+
+	oldval = mutex->__data.__lock;
+
+	/* Check whether we already hold the mutex.  */
+	if (mutex->__data.__owner == id)
+	  {
+	    if (kind == PTHREAD_MUTEX_ERRORCHECK_NP)
+	      return EDEADLK;
+
+	    if (kind == PTHREAD_MUTEX_RECURSIVE_NP)
+	      {
+		/* Just bump the counter.  */
+		if (__builtin_expect (mutex->__data.__count + 1 == 0, 0))
+		  /* Overflow of the counter.  */
+		  return EAGAIN;
+
+		++mutex->__data.__count;
+
+		return 0;
+	      }
+	  }
+
+	int oldprio = -1, ceilval;
+	do
+	  {
+	    int ceiling = (oldval & PTHREAD_MUTEX_PRIO_CEILING_MASK)
+			  >> PTHREAD_MUTEX_PRIO_CEILING_SHIFT;
+
+	    if (__pthread_current_priority () > ceiling)
+	      {
+		if (oldprio != -1)
+		  __pthread_tpp_change_priority (oldprio, -1);
+		return EINVAL;
+	      }
+
+	    retval = __pthread_tpp_change_priority (oldprio, ceiling);
+	    if (retval)
+	      return retval;
+
+	    ceilval = ceiling << PTHREAD_MUTEX_PRIO_CEILING_SHIFT;
+	    oldprio = ceiling;
+
+	    oldval
+	      = atomic_compare_and_exchange_val_acq (&mutex->__data.__lock,
+#ifdef NO_INCR
+						     ceilval | 2,
+#else
+						     ceilval | 1,
+#endif
+						     ceilval);
+
+	    if (oldval == ceilval)
+	      break;
+
+	    do
+	      {
+		oldval
+		  = atomic_compare_and_exchange_val_acq (&mutex->__data.__lock,
+							 ceilval | 2,
+							 ceilval | 1);
+
+		if ((oldval & PTHREAD_MUTEX_PRIO_CEILING_MASK) != ceilval)
+		  break;
+
+		if (oldval != ceilval)
+		  lll_futex_wait (&mutex->__data.__lock, ceilval | 2);
+	      }
+	    while (atomic_compare_and_exchange_val_acq (&mutex->__data.__lock,
+							ceilval | 2, ceilval)
+		   != ceilval);
+	  }
+	while ((oldval & PTHREAD_MUTEX_PRIO_CEILING_MASK) != ceilval);
+
+	assert (mutex->__data.__owner == 0);
+	mutex->__data.__count = 1;
+      }
+      break;
+
     default:
       /* Correct code cannot set any other type.  */
       return EINVAL;
diff --git a/nptl/pthread_mutex_setprioceiling.c b/nptl/pthread_mutex_setprioceiling.c
index 3271f8833a..cd13d1c14c 100644
--- a/nptl/pthread_mutex_setprioceiling.c
+++ b/nptl/pthread_mutex_setprioceiling.c
@@ -18,6 +18,7 @@
    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
    02111-1307 USA.  */
 
+#include <stdbool.h>
 #include <errno.h>
 #include <pthreadP.h>
 
@@ -33,23 +34,83 @@ pthread_mutex_setprioceiling (mutex, prioceiling, old_ceiling)
   if ((mutex->__data.__kind & PTHREAD_MUTEX_PRIO_PROTECT_NP) == 0)
     return EINVAL;
 
-  if (prioceiling < 0 || __builtin_expect (prioceiling > 255, 0))
+  if (__sched_fifo_min_prio == -1)
+    __init_sched_fifo_prio ();
+
+  if (__builtin_expect (prioceiling < __sched_fifo_min_prio, 0)
+      || __builtin_expect (prioceiling > __sched_fifo_max_prio, 0)
+      || __builtin_expect ((prioceiling
+			    & (PTHREAD_MUTEXATTR_PRIO_CEILING_MASK
+			       >> PTHREAD_MUTEXATTR_PRIO_CEILING_SHIFT))
+			   != prioceiling, 0))
     return EINVAL;
 
-  /* XXX This needs to lock with TID, but shouldn't obey priority protect
-     protocol.  */
-  /* lll_xxx_mutex_lock (mutex->__data.__lock); */
+  /* Check whether we already hold the mutex.  */
+  bool locked = false;
+  if (mutex->__data.__owner == THREAD_GETMEM (THREAD_SELF, tid))
+    {
+      if (mutex->__data.__kind == PTHREAD_MUTEX_PP_ERRORCHECK_NP)
+	return EDEADLK;
+
+      if (mutex->__data.__kind == PTHREAD_MUTEX_PP_RECURSIVE_NP)
+	locked = true;
+    }
+
+  int oldval = mutex->__data.__lock;
+  if (! locked)
+    do
+      {
+	/* Need to lock the mutex, but without obeying the priority
+	   protect protocol.  */
+	int ceilval = (oldval & PTHREAD_MUTEX_PRIO_CEILING_MASK);
+
+	oldval = atomic_compare_and_exchange_val_acq (&mutex->__data.__lock,
+						      ceilval | 1, ceilval);
+	if (oldval == ceilval)
+	  break;
+
+	do
+	  {
+	    oldval
+	      = atomic_compare_and_exchange_val_acq (&mutex->__data.__lock,
+						     ceilval | 2,
+						     ceilval | 1);
+
+	    if ((oldval & PTHREAD_MUTEX_PRIO_CEILING_MASK) != ceilval)
+	      break;
+
+	    if (oldval != ceilval)
+	      lll_futex_wait (&mutex->__data.__lock, ceilval | 2);
+	  }
+	while (atomic_compare_and_exchange_val_acq (&mutex->__data.__lock,
+						    ceilval | 2, ceilval)
+	       != ceilval);
+
+	if ((oldval & PTHREAD_MUTEX_PRIO_CEILING_MASK) != ceilval)
+	  continue;
+      }
+    while (0);
+
+  int oldprio = (oldval & PTHREAD_MUTEX_PRIO_CEILING_MASK)
+		>> PTHREAD_MUTEX_PRIO_CEILING_SHIFT;
+  if (locked)
+    {
+      int ret = __pthread_tpp_change_priority (oldprio, prioceiling);
+      if (ret)
+	return ret;
+    }
 
   if (old_ceiling != NULL)
-    *old_ceiling = (mutex->__data.__kind & PTHREAD_MUTEX_PRIO_CEILING_MASK)
-		   >> PTHREAD_MUTEX_PRIO_CEILING_SHIFT;
+    *old_ceiling = oldprio;
 
-  int newkind = (mutex->__data.__kind & ~PTHREAD_MUTEX_PRIO_CEILING_MASK);
-  mutex->__data.__kind = newkind
+  int newlock = 0;
+  if (locked)
+    newlock = (mutex->__data.__lock & ~PTHREAD_MUTEX_PRIO_CEILING_MASK);
+  mutex->__data.__lock = newlock
 			 | (prioceiling << PTHREAD_MUTEX_PRIO_CEILING_SHIFT);
+  atomic_full_barrier ();
 
-  /* XXX This needs to unlock the above special kind of lock.  */
-  /* lll_xxx_mutex_unlock (mutex->__data.__lock); */
+  lll_futex_wake (&mutex->__data.__lock, INT_MAX);
 
   return 0;
 }
diff --git a/nptl/pthread_mutex_timedlock.c b/nptl/pthread_mutex_timedlock.c
index dcff4f81a8..c8e6b8507a 100644
--- a/nptl/pthread_mutex_timedlock.c
+++ b/nptl/pthread_mutex_timedlock.c
@@ -340,6 +340,119 @@ pthread_mutex_timedlock (mutex, abstime)
 	}
       break;
 
+    case PTHREAD_MUTEX_PP_RECURSIVE_NP:
+    case PTHREAD_MUTEX_PP_ERRORCHECK_NP:
+    case PTHREAD_MUTEX_PP_NORMAL_NP:
+    case PTHREAD_MUTEX_PP_ADAPTIVE_NP:
+      {
+	int kind = mutex->__data.__kind & PTHREAD_MUTEX_KIND_MASK_NP;
+
+	oldval = mutex->__data.__lock;
+
+	/* Check whether we already hold the mutex.  */
+	if (mutex->__data.__owner == id)
+	  {
+	    if (kind == PTHREAD_MUTEX_ERRORCHECK_NP)
+	      return EDEADLK;
+
+	    if (kind == PTHREAD_MUTEX_RECURSIVE_NP)
+	      {
+		/* Just bump the counter.  */
+		if (__builtin_expect (mutex->__data.__count + 1 == 0, 0))
+		  /* Overflow of the counter.  */
+		  return EAGAIN;
+
+		++mutex->__data.__count;
+
+		return 0;
+	      }
+	  }
+
+	int oldprio = -1, ceilval;
+	do
+	  {
+	    int ceiling = (oldval & PTHREAD_MUTEX_PRIO_CEILING_MASK)
+			  >> PTHREAD_MUTEX_PRIO_CEILING_SHIFT;
+
+	    if (__pthread_current_priority () > ceiling)
+	      {
+		result = EINVAL;
+	      failpp:
+		if (oldprio != -1)
+		  __pthread_tpp_change_priority (oldprio, -1);
+		return result;
+	      }
+
+	    result = __pthread_tpp_change_priority (oldprio, ceiling);
+	    if (result)
+	      return result;
+
+	    ceilval = ceiling << PTHREAD_MUTEX_PRIO_CEILING_SHIFT;
+	    oldprio = ceiling;
+
+	    oldval
+	      = atomic_compare_and_exchange_val_acq (&mutex->__data.__lock,
+						     ceilval | 1, ceilval);
+
+	    if (oldval == ceilval)
+	      break;
+
+	    do
+	      {
+		oldval
+		  = atomic_compare_and_exchange_val_acq (&mutex->__data.__lock,
+							 ceilval | 2,
+							 ceilval | 1);
+
+		if ((oldval & PTHREAD_MUTEX_PRIO_CEILING_MASK) != ceilval)
+		  break;
+
+		if (oldval != ceilval)
+		  {
+		    /* Reject invalid timeouts.  */
+		    if (abstime->tv_nsec < 0 || abstime->tv_nsec >= 1000000000)
+		      {
+			result = EINVAL;
+			goto failpp;
+		      }
+
+		    struct timeval tv;
+		    struct timespec rt;
+
+		    /* Get the current time.  */
+		    (void) __gettimeofday (&tv, NULL);
+
+		    /* Compute relative timeout.  */
+		    rt.tv_sec = abstime->tv_sec - tv.tv_sec;
+		    rt.tv_nsec = abstime->tv_nsec - tv.tv_usec * 1000;
+		    if (rt.tv_nsec < 0)
+		      {
+			rt.tv_nsec += 1000000000;
+			--rt.tv_sec;
+		      }
+
+		    /* Already timed out?  */
+		    if (rt.tv_sec < 0)
+		      {
+			result = ETIMEDOUT;
+			goto failpp;
+		      }
+
+		    lll_futex_timed_wait (&mutex->__data.__lock,
+					  ceilval | 2, &rt);
+		  }
+	      }
+	    while (atomic_compare_and_exchange_val_acq (&mutex->__data.__lock,
+							ceilval | 2, ceilval)
+		   != ceilval);
+	  }
+	while ((oldval & PTHREAD_MUTEX_PRIO_CEILING_MASK) != ceilval);
+
+	assert (mutex->__data.__owner == 0);
+	mutex->__data.__count = 1;
+      }
+      break;
+
     default:
       /* Correct code cannot set any other type.  */
       return EINVAL;
diff --git a/nptl/pthread_mutex_trylock.c b/nptl/pthread_mutex_trylock.c
index f3a18569a1..94d519233b 100644
--- a/nptl/pthread_mutex_trylock.c
+++ b/nptl/pthread_mutex_trylock.c
@@ -297,6 +297,79 @@ __pthread_mutex_trylock (mutex)
 	return 0;
       }
 
+    case PTHREAD_MUTEX_PP_RECURSIVE_NP:
+    case PTHREAD_MUTEX_PP_ERRORCHECK_NP:
+    case PTHREAD_MUTEX_PP_NORMAL_NP:
+    case PTHREAD_MUTEX_PP_ADAPTIVE_NP:
+      {
+	int kind = mutex->__data.__kind & PTHREAD_MUTEX_KIND_MASK_NP;
+
+	oldval = mutex->__data.__lock;
+
+	/* Check whether we already hold the mutex.  */
+	if (mutex->__data.__owner == id)
+	  {
+	    if (kind == PTHREAD_MUTEX_ERRORCHECK_NP)
+	      return EDEADLK;
+
+	    if (kind == PTHREAD_MUTEX_RECURSIVE_NP)
+	      {
+		/* Just bump the counter.  */
+		if (__builtin_expect (mutex->__data.__count + 1 == 0, 0))
+		  /* Overflow of the counter.  */
+		  return EAGAIN;
+
+		++mutex->__data.__count;
+
+		return 0;
+	      }
+	  }
+
+	int oldprio = -1, ceilval;
+	do
+	  {
+	    int ceiling = (oldval & PTHREAD_MUTEX_PRIO_CEILING_MASK)
+			  >> PTHREAD_MUTEX_PRIO_CEILING_SHIFT;
+
+	    if (__pthread_current_priority () > ceiling)
+	      {
+		if (oldprio != -1)
+		  __pthread_tpp_change_priority (oldprio, -1);
+		return EINVAL;
+	      }
+
+	    int retval = __pthread_tpp_change_priority (oldprio, ceiling);
+	    if (retval)
+	      return retval;
+
+	    ceilval = ceiling << PTHREAD_MUTEX_PRIO_CEILING_SHIFT;
+	    oldprio = ceiling;
+
+	    oldval
+	      = atomic_compare_and_exchange_val_acq (&mutex->__data.__lock,
+						     ceilval | 1, ceilval);
+
+	    if (oldval == ceilval)
+	      break;
+	  }
+	while ((oldval & PTHREAD_MUTEX_PRIO_CEILING_MASK) != ceilval);
+
+	if (oldval != ceilval)
+	  {
+	    __pthread_tpp_change_priority (oldprio, -1);
+	    break;
+	  }
+
+	assert (mutex->__data.__owner == 0);
+	/* Record the ownership.  */
+	mutex->__data.__owner = id;
+	++mutex->__data.__nusers;
+	mutex->__data.__count = 1;
+
+	return 0;
+      }
+      break;
+
     default:
       /* Correct code cannot set any other type.  */
       return EINVAL;
diff --git a/nptl/pthread_mutex_unlock.c b/nptl/pthread_mutex_unlock.c
index 2b5064fbac..33919d60af 100644
--- a/nptl/pthread_mutex_unlock.c
+++ b/nptl/pthread_mutex_unlock.c
@@ -202,6 +202,49 @@ __pthread_mutex_unlock_usercnt (mutex, decr)
       THREAD_SETMEM (THREAD_SELF, robust_head.list_op_pending, NULL);
       break;
 
+    case PTHREAD_MUTEX_PP_RECURSIVE_NP:
+      /* Recursive mutex.  */
+      if (mutex->__data.__owner != THREAD_GETMEM (THREAD_SELF, tid))
+	return EPERM;
+
+      if (--mutex->__data.__count != 0)
+	/* We still hold the mutex.  */
+	return 0;
+      goto pp;
+
+    case PTHREAD_MUTEX_PP_ERRORCHECK_NP:
+      /* Error checking mutex.  */
+      if (mutex->__data.__owner != THREAD_GETMEM (THREAD_SELF, tid)
+	  || (mutex->__data.__lock & ~ PTHREAD_MUTEX_PRIO_CEILING_MASK) == 0)
+	return EPERM;
+      /* FALLTHROUGH */
+
+    case PTHREAD_MUTEX_PP_NORMAL_NP:
+    case PTHREAD_MUTEX_PP_ADAPTIVE_NP:
+      /* Always reset the owner field.  */
+    pp:
+      mutex->__data.__owner = 0;
+
+      if (decr)
+	/* One less user.  */
+	--mutex->__data.__nusers;
+
+      /* Unlock.  */
+      int newval, oldval;
+      do
+	{
+	  oldval = mutex->__data.__lock;
+	  newval = oldval & PTHREAD_MUTEX_PRIO_CEILING_MASK;
+	}
+      while (atomic_compare_and_exchange_bool_acq (&mutex->__data.__lock,
+						   newval, oldval));
+
+      if ((oldval & ~PTHREAD_MUTEX_PRIO_CEILING_MASK) > 1)
+	lll_futex_wake (&mutex->__data.__lock, 1);
+
+      int oldprio = newval >> PTHREAD_MUTEX_PRIO_CEILING_SHIFT;
+      return __pthread_tpp_change_priority (oldprio, -1);
+
     default:
       /* Correct code cannot set any other type.  */
       return EINVAL;
diff --git a/nptl/pthread_mutexattr_getprioceiling.c b/nptl/pthread_mutexattr_getprioceiling.c
index da1beabf46..792e9a43d6 100644
--- a/nptl/pthread_mutexattr_getprioceiling.c
+++ b/nptl/pthread_mutexattr_getprioceiling.c
@@ -27,11 +27,22 @@ pthread_mutexattr_getprioceiling (attr, prioceiling)
      int *prioceiling;
 {
   const struct pthread_mutexattr *iattr;
+  int ceiling;
 
   iattr = (const struct pthread_mutexattr *) attr;
 
-  *prioceiling = ((iattr->mutexkind & PTHREAD_MUTEXATTR_PRIO_CEILING_MASK)
-		  >> PTHREAD_MUTEXATTR_PRIO_CEILING_SHIFT);
+  ceiling = ((iattr->mutexkind & PTHREAD_MUTEXATTR_PRIO_CEILING_MASK)
+	     >> PTHREAD_MUTEXATTR_PRIO_CEILING_SHIFT);
+
+  if (! ceiling)
+    {
+      if (__sched_fifo_min_prio == -1)
+	__init_sched_fifo_prio ();
+      if (ceiling < __sched_fifo_min_prio)
+	ceiling = __sched_fifo_min_prio;
+    }
+
+  *prioceiling = ceiling;
 
   return 0;
 }
diff --git a/nptl/pthread_mutexattr_setprioceiling.c b/nptl/pthread_mutexattr_setprioceiling.c
index 6c15b46833..9b7874f739 100644
--- a/nptl/pthread_mutexattr_setprioceiling.c
+++ b/nptl/pthread_mutexattr_setprioceiling.c
@@ -27,7 +27,15 @@ pthread_mutexattr_setprioceiling (attr, prioceiling)
      pthread_mutexattr_t *attr;
      int prioceiling;
 {
-  if (prioceiling < 0 || __builtin_expect (prioceiling > 255, 0))
+  if (__sched_fifo_min_prio == -1)
+    __init_sched_fifo_prio ();
+
+  if (__builtin_expect (prioceiling < __sched_fifo_min_prio, 0)
+      || __builtin_expect (prioceiling > __sched_fifo_max_prio, 0)
+      || __builtin_expect ((prioceiling
+			    & (PTHREAD_MUTEXATTR_PRIO_CEILING_MASK
+			       >> PTHREAD_MUTEXATTR_PRIO_CEILING_SHIFT))
+			   != prioceiling, 0))
     return EINVAL;
 
   struct pthread_mutexattr *iattr = (struct pthread_mutexattr *) attr;
diff --git a/nptl/pthread_setschedparam.c b/nptl/pthread_setschedparam.c
index 5889cc98a9..30ac6b3e89 100644
--- a/nptl/pthread_setschedparam.c
+++ b/nptl/pthread_setschedparam.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
+/* Copyright (C) 2002, 2003, 2004, 2006 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
 
@@ -45,6 +45,19 @@ __pthread_setschedparam (threadid, policy, param)
 
   lll_lock (pd->lock);
 
+  struct sched_param p;
+  const struct sched_param *orig_param = param;
+
+  /* If the thread should have higher priority because of some
+     PTHREAD_PRIO_PROTECT mutexes it holds, adjust the priority.  */
+  if (__builtin_expect (pd->tpp != NULL, 0)
+      && pd->tpp->priomax > param->sched_priority)
+    {
+      p = *param;
+      p.sched_priority = pd->tpp->priomax;
+      param = &p;
+    }
+
   /* Try to set the scheduler information.  */
   if (__builtin_expect (__sched_setscheduler (pd->tid, policy,
 					      param) == -1, 0))
@@ -54,7 +67,7 @@ __pthread_setschedparam (threadid, policy, param)
       /* We succeeded changing the kernel information.  Reflect this
 	 change in the thread descriptor.  */
       pd->schedpolicy = policy;
-      memcpy (&pd->schedparam, param, sizeof (struct sched_param));
+      memcpy (&pd->schedparam, orig_param, sizeof (struct sched_param));
       pd->flags |= ATTR_FLAG_SCHED_SET | ATTR_FLAG_POLICY_SET;
     }
 
diff --git a/nptl/pthread_setschedprio.c b/nptl/pthread_setschedprio.c
index 063f5232f5..4a71f6c7b3 100644
--- a/nptl/pthread_setschedprio.c
+++ b/nptl/pthread_setschedprio.c
@@ -47,6 +47,11 @@ pthread_setschedprio (threadid, prio)
 
   lll_lock (pd->lock);
 
+  /* If the thread should have higher priority because of some
+     PTHREAD_PRIO_PROTECT mutexes it holds, adjust the priority.  */
+  if (__builtin_expect (pd->tpp != NULL, 0) && pd->tpp->priomax > prio)
+    param.sched_priority = pd->tpp->priomax;
+
   /* Try to set the scheduler information.  */
   if (__builtin_expect (sched_setparam (pd->tid, &param) == -1, 0))
     result = errno;
@@ -54,6 +59,7 @@ pthread_setschedprio (threadid, prio)
     {
       /* We succeeded changing the kernel information.  Reflect this
 	 change in the thread descriptor.  */
+      param.sched_priority = prio;
       memcpy (&pd->schedparam, &param, sizeof (struct sched_param));
       pd->flags |= ATTR_FLAG_SCHED_SET;
     }
diff --git a/nptl/sysdeps/unix/sysv/linux/bits/posix_opt.h b/nptl/sysdeps/unix/sysv/linux/bits/posix_opt.h
index d8eced1f22..40160c54de 100644
--- a/nptl/sysdeps/unix/sysv/linux/bits/posix_opt.h
+++ b/nptl/sysdeps/unix/sysv/linux/bits/posix_opt.h
@@ -82,6 +82,10 @@
 /* We support priority inheritence.  */
 #define _POSIX_THREAD_PRIO_INHERIT	200112L
 
+/* We support priority protection, though only for non-robust
+   mutexes.  */
+#define _POSIX_THREAD_PRIO_PROTECT	200112L
+
 /* We support POSIX.1b semaphores.  */
 #define _POSIX_SEMAPHORES	200112L
 
@@ -174,7 +178,4 @@
 /* Typed memory objects are not available.  */
 #define _POSIX_TYPED_MEMORY_OBJECTS	-1
 
-/* No support for priority protection so far.  */
-#define _POSIX_THREAD_PRIO_PROTECT	-1
-
 #endif /* posix_opt.h */
diff --git a/nptl/tpp.c b/nptl/tpp.c
new file mode 100644
index 0000000000..367dd8162a
--- /dev/null
+++ b/nptl/tpp.c
@@ -0,0 +1,172 @@
+/* Thread Priority Protect helpers.
+   Copyright (C) 2006 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Jakub Jelinek <jakub@redhat.com>, 2006.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <assert.h>
+#include <atomic.h>
+#include <errno.h>
+#include <pthreadP.h>
+#include <sched.h>
+#include <stdlib.h>
+
+
+int __sched_fifo_min_prio = -1;
+int __sched_fifo_max_prio = -1;
+
+void
+__init_sched_fifo_prio (void)
+{
+  __sched_fifo_max_prio = sched_get_priority_max (SCHED_FIFO);
+  atomic_write_barrier ();
+  __sched_fifo_min_prio = sched_get_priority_min (SCHED_FIFO);
+}
+
+int
+__pthread_tpp_change_priority (int previous_prio, int new_prio)
+{
+  struct pthread *self = THREAD_SELF;
+  struct priority_protection_data *tpp = THREAD_GETMEM (self, tpp);
+
+  if (tpp == NULL)
+    {
+      if (__sched_fifo_min_prio == -1)
+	__init_sched_fifo_prio ();
+
+      size_t size = sizeof *tpp;
+      size += (__sched_fifo_max_prio - __sched_fifo_min_prio + 1)
+	      * sizeof (tpp->priomap[0]);
+      tpp = calloc (size, 1);
+      if (tpp == NULL)
+	return ENOMEM;
+      tpp->priomax = __sched_fifo_min_prio - 1;
+      THREAD_SETMEM (self, tpp, tpp);
+    }
+
+  assert (new_prio == -1
+	  || (new_prio >= __sched_fifo_min_prio
+	      && new_prio <= __sched_fifo_max_prio));
+  assert (previous_prio == -1
+	  || (previous_prio >= __sched_fifo_min_prio
+	      && previous_prio <= __sched_fifo_max_prio));
+
+  int priomax = tpp->priomax;
+  int newpriomax = priomax;
+  if (new_prio != -1)
+    {
+      if (tpp->priomap[new_prio - __sched_fifo_min_prio] + 1 == 0)
+	return EAGAIN;
+      ++tpp->priomap[new_prio - __sched_fifo_min_prio];
+      if (new_prio > priomax)
+	newpriomax = new_prio;
+    }
+
+  if (previous_prio != -1)
+    {
+      if (--tpp->priomap[previous_prio - __sched_fifo_min_prio] == 0
+	  && priomax == previous_prio
+	  && previous_prio > new_prio)
+	{
+	  int i;
+	  for (i = previous_prio - 1; i >= __sched_fifo_min_prio; --i)
+	    if (tpp->priomap[i - __sched_fifo_min_prio])
+	      break;
+	  newpriomax = i;
+	}
+    }
+
+  if (priomax == newpriomax)
+    return 0;
+
+  lll_lock (self->lock);
+
+  tpp->priomax = newpriomax;
+
+  int result = 0;
+
+  if ((self->flags & ATTR_FLAG_SCHED_SET) == 0)
+    {
+      if (__sched_getparam (self->tid, &self->schedparam) != 0)
+	result = errno;
+      else
+	self->flags |= ATTR_FLAG_SCHED_SET;
+    }
+
+  if ((self->flags & ATTR_FLAG_POLICY_SET) == 0)
+    {
+      self->schedpolicy = __sched_getscheduler (self->tid);
+      if (self->schedpolicy == -1)
+	result = errno;
+      else
+	self->flags |= ATTR_FLAG_POLICY_SET;
+    }
+
+  if (result == 0)
+    {
+      struct sched_param sp = self->schedparam;
+      if (sp.sched_priority < newpriomax || sp.sched_priority < priomax)
+	{
+	  if (sp.sched_priority < newpriomax)
+	    sp.sched_priority = newpriomax;
+
+	  if (__sched_setscheduler (self->tid, self->schedpolicy, &sp) < 0)
+	    result = errno;
+	}
+    }
+
+  lll_unlock (self->lock);
+
+  return result;
+}
+
+int
+__pthread_current_priority (void)
+{
+  struct pthread *self = THREAD_SELF;
+  if ((self->flags & (ATTR_FLAG_POLICY_SET | ATTR_FLAG_SCHED_SET))
+      == (ATTR_FLAG_POLICY_SET | ATTR_FLAG_SCHED_SET))
+    return self->schedparam.sched_priority;
+
+  int result = 0;
+
+  lll_lock (self->lock);
+
+  if ((self->flags & ATTR_FLAG_SCHED_SET) == 0)
+    {
+      if (__sched_getparam (self->tid, &self->schedparam) != 0)
+	result = -1;
+      else
+	self->flags |= ATTR_FLAG_SCHED_SET;
+    }
+
+  if ((self->flags & ATTR_FLAG_POLICY_SET) == 0)
+    {
+      self->schedpolicy = __sched_getscheduler (self->tid);
+      if (self->schedpolicy == -1)
+	result = -1;
+      else
+	self->flags |= ATTR_FLAG_POLICY_SET;
+    }
+
+  if (result != -1)
+    result = self->schedparam.sched_priority;
+
+  lll_unlock (self->lock);
+
+  return result;
+}
diff --git a/nptl/tst-mutex1.c b/nptl/tst-mutex1.c
index c3ef5b2b51..9453f04918 100644
--- a/nptl/tst-mutex1.c
+++ b/nptl/tst-mutex1.c
@@ -71,5 +71,7 @@ do_test (void)
   return 0;
 }
 
-#define TEST_FUNCTION do_test ()
+#ifndef TEST_FUNCTION
+# define TEST_FUNCTION do_test ()
+#endif
 #include "../test-skeleton.c"
diff --git a/nptl/tst-mutex6.c b/nptl/tst-mutex6.c
index e5698c3eb0..de64bdb435 100644
--- a/nptl/tst-mutex6.c
+++ b/nptl/tst-mutex6.c
@@ -69,5 +69,7 @@ do_test (void)
 }
 
 #define EXPECTED_SIGNAL SIGALRM
-#define TEST_FUNCTION do_test ()
+#ifndef TEST_FUNCTION
+# define TEST_FUNCTION do_test ()
+#endif
 #include "../test-skeleton.c"
diff --git a/nptl/tst-mutexpp1.c b/nptl/tst-mutexpp1.c
new file mode 100644
index 0000000000..9b7d7fe263
--- /dev/null
+++ b/nptl/tst-mutexpp1.c
@@ -0,0 +1,45 @@
+#include <pthread.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "tst-tpp.h"
+
+static pthread_mutexattr_t a;
+
+static void
+prepare (void)
+{
+  init_tpp_test ();
+
+  if (pthread_mutexattr_init (&a) != 0)
+    {
+      puts ("mutexattr_init failed");
+      exit (1);
+    }
+
+  if (pthread_mutexattr_setprotocol (&a, PTHREAD_PRIO_PROTECT) != 0)
+    {
+      puts ("mutexattr_setprotocol failed");
+      exit (1);
+    }
+
+  if (pthread_mutexattr_setprioceiling (&a, 6) != 0)
+    {
+      puts ("mutexattr_setprioceiling failed");
+      exit (1);
+    }
+}
+#define PREPARE(argc, argv) prepare ()
+
+static int do_test (void);
+
+static int
+do_test_wrapper (void)
+{
+  init_tpp_test ();
+  return do_test ();
+}
+#define TEST_FUNCTION do_test_wrapper ()
+
+#define ATTR &a
+#include "tst-mutex1.c"
diff --git a/nptl/tst-mutexpp10.c b/nptl/tst-mutexpp10.c
new file mode 100644
index 0000000000..78281a4d3b
--- /dev/null
+++ b/nptl/tst-mutexpp10.c
@@ -0,0 +1,334 @@
+/* Copyright (C) 2006 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Jakub Jelinek <jakub@redhat.com>, 2006.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <errno.h>
+#include <limits.h>
+#include <pthread.h>
+#include <sched.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "tst-tpp.h"
+
+static int
+do_test (void)
+{
+  int ret = 0;
+
+  init_tpp_test ();
+
+  pthread_mutexattr_t ma;
+  if (pthread_mutexattr_init (&ma))
+    {
+      puts ("mutexattr_init failed");
+      return 1;
+    }
+  if (pthread_mutexattr_setprotocol (&ma, PTHREAD_PRIO_PROTECT))
+    {
+      puts ("mutexattr_setprotocol failed");
+      return 1;
+    }
+
+  int prioceiling;
+  if (pthread_mutexattr_getprioceiling (&ma, &prioceiling))
+    {
+      puts ("mutexattr_getprioceiling failed");
+      return 1;
+    }
+
+  if (prioceiling < fifo_min || prioceiling > fifo_max)
+    {
+      printf ("prioceiling %d not in %d..%d range\n",
+	      prioceiling, fifo_min, fifo_max);
+      return 1;
+    }
+
+  if (fifo_max < INT_MAX
+      && pthread_mutexattr_setprioceiling (&ma, fifo_max + 1) != EINVAL)
+    {
+      printf ("mutexattr_setprioceiling %d did not fail with EINVAL\n",
+	      fifo_max + 1);
+      return 1;
+    }
+  
+  if (fifo_min > 0
+      && pthread_mutexattr_setprioceiling (&ma, fifo_min - 1) != EINVAL)
+    {
+      printf ("mutexattr_setprioceiling %d did not fail with EINVAL\n",
+	      fifo_min - 1);
+      return 1;
+    }
+
+  if (pthread_mutexattr_setprioceiling (&ma, fifo_min))
+    {
+      puts ("mutexattr_setprioceiling failed");
+      return 1;
+    }
+
+  if (pthread_mutexattr_setprioceiling (&ma, fifo_max))
+    {
+      puts ("mutexattr_setprioceiling failed");
+      return 1;
+    }
+
+  if (pthread_mutexattr_setprioceiling (&ma, 6))
+    {
+      puts ("mutexattr_setprioceiling failed");
+      return 1;
+    }
+
+  if (pthread_mutexattr_getprioceiling (&ma, &prioceiling))
+    {
+      puts ("mutexattr_getprioceiling failed");
+      return 1;
+    }
+
+  if (prioceiling != 6)
+    {
+      printf ("mutexattr_getprioceiling returned %d != 6\n",
+	      prioceiling);
+      return 1;
+    }
+
+  pthread_mutex_t m1, m2, m3;
+  int e = pthread_mutex_init (&m1, &ma);
+  if (e == ENOTSUP)
+    {
+      puts ("cannot support selected type of mutexes");
+      return 0;
+    }
+  else if (e != 0)
+    {
+      puts ("mutex_init failed");
+      return 1;
+    }
+
+  if (pthread_mutexattr_setprioceiling (&ma, 8))
+    {
+      puts ("mutexattr_setprioceiling failed");
+      return 1;
+    }
+
+  if (pthread_mutex_init (&m2, &ma))
+    {
+      puts ("mutex_init failed");
+      return 1;
+    }
+
+  if (pthread_mutexattr_setprioceiling (&ma, 5))
+    {
+      puts ("mutexattr_setprioceiling failed");
+      return 1;
+    }
+
+  if (pthread_mutex_init (&m3, &ma))
+    {
+      puts ("mutex_init failed");
+      return 1;
+    }
+
+  CHECK_TPP_PRIORITY (4, 4);
+
+  if (pthread_mutex_lock (&m1) != 0)
+    {
+      puts ("mutex_lock failed");
+      return 1;
+    }
+
+  CHECK_TPP_PRIORITY (4, 6);
+
+  if (pthread_mutex_trylock (&m2) != 0)
+    {
+      puts ("mutex_lock failed");
+      return 1;
+    }
+
+  CHECK_TPP_PRIORITY (4, 8);
+
+  if (pthread_mutex_lock (&m3) != 0)
+    {
+      puts ("mutex_lock failed");
+      return 1;
+    }
+
+  CHECK_TPP_PRIORITY (4, 8);
+
+  if (pthread_mutex_unlock (&m2) != 0)
+    {
+      puts ("mutex_unlock failed");
+      return 1;
+    }
+
+  CHECK_TPP_PRIORITY (4, 6);
+
+  if (pthread_mutex_unlock (&m1) != 0)
+    {
+      puts ("mutex_unlock failed");
+      return 1;
+    }
+
+  CHECK_TPP_PRIORITY (4, 5);
+
+  if (pthread_mutex_lock (&m2) != 0)
+    {
+      puts ("mutex_lock failed");
+      return 1;
+    }
+
+  CHECK_TPP_PRIORITY (4, 8);
+
+  if (pthread_mutex_unlock (&m2) != 0)
+    {
+      puts ("mutex_unlock failed");
+      return 1;
+    }
+
+  CHECK_TPP_PRIORITY (4, 5);
+
+  if (pthread_mutex_getprioceiling (&m1, &prioceiling))
+    {
+      puts ("mutex_getprioceiling m1 failed");
+      return 1;
+    }
+  else if (prioceiling != 6)
+    {
+      printf ("unexpected m1 prioceiling %d != 6\n", prioceiling);
+      return 1;
+    }
+
+  if (pthread_mutex_getprioceiling (&m2, &prioceiling))
+    {
+      puts ("mutex_getprioceiling m2 failed");
+      return 1;
+    }
+  else if (prioceiling != 8)
+    {
+      printf ("unexpected m2 prioceiling %d != 8\n", prioceiling);
+      return 1;
+    }
+
+  if (pthread_mutex_getprioceiling (&m3, &prioceiling))
+    {
+      puts ("mutex_getprioceiling m3 failed");
+      return 1;
+    }
+  else if (prioceiling != 5)
+    {
+      printf ("unexpected m3 prioceiling %d != 5\n", prioceiling);
+      return 1;
+    }
+
+  if (pthread_mutex_setprioceiling (&m1, 7, &prioceiling))
+    {
+      printf ("mutex_setprioceiling failed");
+      return 1;
+    }
+  else if (prioceiling != 6)
+    {
+      printf ("unexpected m1 old prioceiling %d != 6\n", prioceiling);
+      return 1;
+    }
+    
+  if (pthread_mutex_getprioceiling (&m1, &prioceiling))
+    {
+      puts ("mutex_getprioceiling m1 failed");
+      return 1;
+    }
+  else if (prioceiling != 7)
+    {
+      printf ("unexpected m1 prioceiling %d != 7\n", prioceiling);
+      return 1;
+    }
+
+  CHECK_TPP_PRIORITY (4, 5);
+
+  if (pthread_mutex_unlock (&m3) != 0)
+    {
+      puts ("mutex_unlock failed");
+      return 1;
+    }
+
+  CHECK_TPP_PRIORITY (4, 4);
+
+  if (pthread_mutex_trylock (&m1) != 0)
+    {
+      puts ("mutex_lock failed");
+      return 1;
+    }
+
+  CHECK_TPP_PRIORITY (4, 7);
+
+  struct sched_param sp;
+  memset (&sp, 0, sizeof (sp));
+  sp.sched_priority = 8;
+  if (pthread_setschedparam (pthread_self (), SCHED_FIFO, &sp))
+    {
+      puts ("cannot set scheduling params");
+      return 1;
+    }
+
+  CHECK_TPP_PRIORITY (8, 8);
+
+  if (pthread_mutex_unlock (&m1) != 0)
+    {
+      puts ("mutex_unlock failed");
+      return 1;
+    }
+
+  CHECK_TPP_PRIORITY (8, 8);
+
+  if (pthread_mutex_lock (&m3) != EINVAL)
+    {
+      puts ("pthread_mutex_lock didn't fail with EINVAL");
+      return 1;
+    }
+
+  CHECK_TPP_PRIORITY (8, 8);
+
+  if (pthread_mutex_destroy (&m1) != 0)
+    {
+      puts ("mutex_destroy failed");
+      return 1;
+    }
+
+  if (pthread_mutex_destroy (&m2) != 0)
+    {
+      puts ("mutex_destroy failed");
+      return 1;
+    }
+
+  if (pthread_mutex_destroy (&m3) != 0)
+    {
+      puts ("mutex_destroy failed");
+      return 1;
+    }
+
+  if (pthread_mutexattr_destroy (&ma) != 0)
+    {
+      puts ("mutexattr_destroy failed");
+      return 1;
+    }
+
+  return ret;
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"
diff --git a/nptl/tst-mutexpp6.c b/nptl/tst-mutexpp6.c
new file mode 100644
index 0000000000..2ddf6b45c6
--- /dev/null
+++ b/nptl/tst-mutexpp6.c
@@ -0,0 +1,45 @@
+#include <pthread.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "tst-tpp.h"
+
+static pthread_mutexattr_t a;
+
+static void
+prepare (void)
+{
+  init_tpp_test ();
+
+  if (pthread_mutexattr_init (&a) != 0)
+    {
+      puts ("mutexattr_init failed");
+      exit (1);
+    }
+
+  if (pthread_mutexattr_setprotocol (&a, PTHREAD_PRIO_PROTECT) != 0)
+    {
+      puts ("mutexattr_setprotocol failed");
+      exit (1);
+    }
+
+  if (pthread_mutexattr_setprioceiling (&a, 6) != 0)
+    {
+      puts ("mutexattr_setprioceiling failed");
+      exit (1);
+    }
+}
+#define PREPARE(argc, argv) prepare ()
+
+static int do_test (void);
+
+static int
+do_test_wrapper (void)
+{
+  init_tpp_test ();
+  return do_test ();
+}
+#define TEST_FUNCTION do_test_wrapper ()
+
+#define ATTR &a
+#include "tst-mutex6.c"
diff --git a/nptl/tst-tpp.h b/nptl/tst-tpp.h
new file mode 100644
index 0000000000..c5844b26dd
--- /dev/null
+++ b/nptl/tst-tpp.h
@@ -0,0 +1,94 @@
+/* Copyright (C) 2006 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Jakub Jelinek <jakub@redhat.com>, 2006.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <errno.h>
+#include <pthread.h>
+#include <sched.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/syscall.h>
+
+/* This test is Linux specific.  */
+#define CHECK_TPP_PRIORITY(normal, boosted) \
+  do								\
+    {								\
+      pid_t tid = syscall (__NR_gettid);			\
+								\
+      struct sched_param cep_sp;				\
+      int cep_policy;						\
+      if (pthread_getschedparam (pthread_self (), &cep_policy,	\
+				 &cep_sp) != 0)			\
+	{							\
+	  puts ("getschedparam failed");			\
+	  ret = 1;						\
+	}							\
+      else if (cep_sp.sched_priority != (normal))		\
+	{							\
+	  printf ("unexpected priority %d != %d\n",		\
+		  cep_sp.sched_priority, (normal));		\
+	}							\
+      if (syscall (__NR_sched_getparam, tid, &cep_sp) == 0	\
+	  && cep_sp.sched_priority != (boosted))		\
+	{							\
+	  printf ("unexpected boosted priority %d != %d\n",	\
+		  cep_sp.sched_priority, (boosted));		\
+	  ret = 1;						\
+	}							\
+    }								\
+  while (0)
+
+int fifo_min, fifo_max;
+
+void
+init_tpp_test (void)
+{
+  fifo_min = sched_get_priority_min (SCHED_FIFO);
+  if (fifo_min < 0)
+    {
+      printf ("couldn't get min priority for SCHED_FIFO: %m\n");
+      exit (1);
+    }
+
+  fifo_max = sched_get_priority_max (SCHED_FIFO);
+  if (fifo_max < 0)
+    {
+      printf ("couldn't get max priority for SCHED_FIFO: %m\n");
+      exit (1);
+    }
+
+  if (fifo_min > 4 || fifo_max < 10)
+    {
+      printf ("%d..%d SCHED_FIFO priority interval not suitable for this test\n",
+	      fifo_min, fifo_max);
+      exit (0);
+    }
+
+  struct sched_param sp;
+  memset (&sp, 0, sizeof (sp));
+  sp.sched_priority = 4;
+  int e = pthread_setschedparam (pthread_self (), SCHED_FIFO, &sp);
+  if (e != 0)
+    {
+      errno = e;
+      printf ("cannot set scheduling params: %m\n");
+      exit (0);
+    }
+}