1 files changed, 11 insertions, 1 deletions

diff --git a/arch/powerpc/include/asm/spinlock.h b/arch/powerpc/include/asm/spinlock.h
index 5f54a744dcc5..35aa339410bd 100644
--- a/arch/powerpc/include/asm/spinlock.h
+++ b/arch/powerpc/include/asm/spinlock.h
@@ -28,7 +28,7 @@
 #include <asm/synch.h>
 #include <asm/ppc-opcode.h>
 
-#define arch_spin_is_locked(x)          ((x)->slock != 0)
+#define smp_mb__after_unlock_lock()     smp_mb()  /* Full ordering for lock. */
 
 #ifdef CONFIG_PPC64
 /* use 0x800000yy when locked, where yy == CPU number */
@@ -54,6 +54,16 @@
 #define SYNC_IO
 #endif
 
+static __always_inline int arch_spin_value_unlocked(arch_spinlock_t lock)
+{
+        return lock.slock == 0;
+}
+
+static inline int arch_spin_is_locked(arch_spinlock_t *lock)
+{
+        return !arch_spin_value_unlocked(*lock);
+}
+
 /*
  * This returns the old value in the lock, so we succeeded
  * in getting the lock if the return value is 0.