locking: Convert raw_spinlock to arch_spinlock

The raw_spin* namespace was taken by lockdep for the architecture
specific implementations. raw_spin_* would be the ideal name space for
the spinlocks which are not converted to sleeping locks in preempt-rt.

Linus suggested to convert the raw_ to arch_ locks and cleanup the
name space instead of using an artifical name like core_spin,
atomic_spin or whatever

No functional change.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: Ingo Molnar <mingo@elte.hu>
Cc: linux-arch@vger.kernel.org

kernel/trace/trace_clock.c

@@ -71,10 +71,10 @@ u64 notrace trace_clock(void)
 /* keep prev_time and lock in the same cacheline. */
 static struct {
 	u64 prev_time;
-	raw_spinlock_t lock;
+	arch_spinlock_t lock;
 } trace_clock_struct ____cacheline_aligned_in_smp =
 	{
-		.lock = (raw_spinlock_t)__RAW_SPIN_LOCK_UNLOCKED,
+		.lock = (arch_spinlock_t)__RAW_SPIN_LOCK_UNLOCKED,
 	};
 
 u64 notrace trace_clock_global(void)