Change most LitmusRT spinlock_t in raw_spinlock_t

Adapt to new schema for spinlock:
(tglx 20091217)
spinlock - the weakest one, which might sleep in RT
raw_spinlock - spinlock which always spins even on RT
arch_spinlock - the hardware level architecture dependent implementation

----

Most probably, all the spinlocks changed by this commit will be true
spinning lock (raw_spinlock) in PreemptRT (so hopefully we'll need few
changes when porting Litmmus to PreemptRT).

There are a couple of spinlock that the kernel still defines as
spinlock_t (therefore no changes reported in this commit) that might cause
us troubles:

- wait_queue_t lock is defined as spinlock_t; it is used in:
  * fmlp.c -- sem->wait.lock
  * sync.c -- ts_release.wait.lock

- rwlock_t used in fifo implementation in sched_trace.c
  * this need probably to be changed to something always spinning in RT
    at the expense of increased locking time.

----

This commit also fixes warnings and errors due to the need to include
slab.h when using kmalloc() and friends.

----

This commit does not compile.

1 files changed, 9 insertions, 9 deletions

diff --git a/litmus/rt_domain.c b/litmus/rt_domain.c
index 609ff0f82abb..8d5db6050723 100644
--- a/litmus/rt_domain.c
+++ b/litmus/rt_domain.c
@@ -53,11 +53,11 @@ static enum hrtimer_restart on_release_timer(struct hrtimer *timer)
 
         rh = container_of(timer, struct release_heap, timer);
 
-        spin_lock_irqsave(&rh->dom->release_lock, flags);
+        raw_spin_lock_irqsave(&rh->dom->release_lock, flags);
         TRACE("CB has the release_lock 0x%p\n", &rh->dom->release_lock);
         /* remove from release queue */
         list_del(&rh->list);
-        spin_unlock_irqrestore(&rh->dom->release_lock, flags);
+        raw_spin_unlock_irqrestore(&rh->dom->release_lock, flags);
         TRACE("CB returned release_lock 0x%p\n", &rh->dom->release_lock);
 
         /* call release callback */
@@ -185,20 +185,20 @@ static void arm_release_timer(rt_domain_t *_rt)
                 list_del(pos);
 
                 /* put into release heap while holding release_lock */
-                spin_lock(&rt->release_lock);
+                raw_spin_lock(&rt->release_lock);
                 TRACE_TASK(t, "I have the release_lock 0x%p\n", &rt->release_lock);
 
                 rh = get_release_heap(rt, t, 0);
                 if (!rh) {
                         /* need to use our own, but drop lock first */
-                        spin_unlock(&rt->release_lock);
+                        raw_spin_unlock(&rt->release_lock);
                         TRACE_TASK(t, "Dropped release_lock 0x%p\n",
                                    &rt->release_lock);
 
                         reinit_release_heap(t);
                         TRACE_TASK(t, "release_heap ready\n");
 
-                        spin_lock(&rt->release_lock);
+                        raw_spin_lock(&rt->release_lock);
                         TRACE_TASK(t, "Re-acquired release_lock 0x%p\n",
                                    &rt->release_lock);
 
@@ -207,7 +207,7 @@ static void arm_release_timer(rt_domain_t *_rt)
                 bheap_insert(rt->order, &rh->heap, tsk_rt(t)->heap_node);
                 TRACE_TASK(t, "arm_release_timer(): added to release heap\n");
 
-                spin_unlock(&rt->release_lock);
+                raw_spin_unlock(&rt->release_lock);
                 TRACE_TASK(t, "Returned the release_lock 0x%p\n", &rt->release_lock);
 
                 /* To avoid arming the timer multiple times, we only let the
@@ -258,9 +258,9 @@ void rt_domain_init(rt_domain_t *rt,
         for (i = 0; i < RELEASE_QUEUE_SLOTS; i++)
                 INIT_LIST_HEAD(&rt->release_queue.slot[i]);
 
-        spin_lock_init(&rt->ready_lock);
-        spin_lock_init(&rt->release_lock);
-        spin_lock_init(&rt->tobe_lock);
+        raw_spin_lock_init(&rt->ready_lock);
+        raw_spin_lock_init(&rt->release_lock);
+        raw_spin_lock_init(&rt->tobe_lock);
 
         rt->check_resched       = check;
         rt->release_jobs        = release;