[PATCH] m32r: Update syscall macros for MMU-less targets

[~andy/linux] / include / asm-m68k / atomic.h

diff --git a/include/asm-m68k/atomic.h b/include/asm-m68k/atomic.h
index 38f3043e7fe1acfb9be1b8c8286eb4f488c1672b..b8a4e75d679d810cd2948a71932851d8b09ee195 100644 (file)
--- a/include/asm-m68k/atomic.h
+++ b/include/asm-m68k/atomic.h
@@ -139,10 +139,23 @@ 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()
 #define smp_mb__before_atomic_inc()    barrier()
 #define smp_mb__after_atomic_inc()     barrier()
 
+#include <asm-generic/atomic.h>
 #endif /* __ARCH_M68K_ATOMIC __ */