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, 4 insertions, 4 deletions

diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c
index c0b440b1f6ee..02e5097bf319 100644
--- a/kernel/hrtimer.c
+++ b/kernel/hrtimer.c
@@ -1052,9 +1052,9 @@ void hrtimer_pull(void)
         struct hrtimer_start_on_info *info;
         struct list_head *pos, *safe, list;
 
-        spin_lock(&base->lock);
+        raw_spin_lock(&base->lock);
         list_replace_init(&base->to_pull, &list);
-        spin_unlock(&base->lock);
+        raw_spin_unlock(&base->lock);
 
         list_for_each_safe(pos, safe, &list) {
                 info = list_entry(pos, struct hrtimer_start_on_info, list);
@@ -1108,10 +1108,10 @@ int hrtimer_start_on(int cpu, struct hrtimer_start_on_info* info,
                 } else {
                         TRACE("hrtimer_start_on: pulling to remote CPU\n");
                         base = &per_cpu(hrtimer_bases, cpu);
-                        spin_lock_irqsave(&base->lock, flags);
+                        raw_spin_lock_irqsave(&base->lock, flags);
                         was_empty = list_empty(&base->to_pull);
                         list_add(&info->list, &base->to_pull);
-                        spin_unlock_irqrestore(&base->lock, flags);
+                        raw_spin_unlock_irqrestore(&base->lock, flags);
                         if (was_empty)
                                 /* only send IPI if other no else
                                  * has done so already