1 files changed, 12 insertions, 0 deletions

diff --git a/include/asm-m68k/atomic.h b/include/asm-m68k/atomic.h
index 38f3043e7fe1..e3c962eeabf3 100644
--- a/include/asm-m68k/atomic.h
+++ b/include/asm-m68k/atomic.h
@@ -139,6 +139,18 @@ static inline void atomic_set_mask(unsigned long mask, unsigned long *v)
         __asm__ __volatile__("orl %1,%0" : "+m" (*v) : "id" (mask));
 }
 
+#define atomic_cmpxchg(v, o, n) ((int)cmpxchg(&((v)->counter), (o), (n)))
+
+#define atomic_add_unless(v, a, u)                              \
+({                                                              \
+        int c, old;                                             \
+        c = atomic_read(v);                                     \
+        while (c != (u) && (old = atomic_cmpxchg((v), c, c + (a))) != c) \
+                c = old;                                        \
+        c != (u);                                               \
+})
+#define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0)
+
 /* Atomic operations are already serializing */
 #define smp_mb__before_atomic_dec()     barrier()
 #define smp_mb__after_atomic_dec()      barrier()