Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mattst88/alpha

Pull alpha update from Matt Turner:
 "A single patch for alpha, one that enables ARCH_USE_CMPXCHG_LOCKREF
  and offers around an 8% performance improvement on a little benchmark
  that you wrote"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mattst88/alpha:
  alpha: select CONFIG_ARCH_USE_CMPXCHG_LOCKREF.

arch/alpha/Kconfig

@@ -3,6 +3,7 @@ config ALPHA
 	default y
 	select ARCH_MIGHT_HAVE_PC_PARPORT
 	select ARCH_MIGHT_HAVE_PC_SERIO
+	select ARCH_USE_CMPXCHG_LOCKREF
 	select HAVE_AOUT
 	select HAVE_IDE
 	select HAVE_OPROFILE

arch/alpha/include/asm/spinlock.h

@@ -16,6 +16,11 @@
 #define arch_spin_unlock_wait(x) \
 		do { cpu_relax(); } while ((x)->lock)
 
+static inline int arch_spin_value_unlocked(arch_spinlock_t lock)
+{
+        return lock.lock == 0;
+}
+
 static inline void arch_spin_unlock(arch_spinlock_t * lock)
 {
 	mb();