* Since "a" is usually an address, use one spinlock per cacheline.
  */
 #  define ATOMIC_HASH_SIZE 4
-#  define ATOMIC_HASH(a) (&(__atomic_hash[ (((unsigned long) a)/L1_CACHE_BYTES) & (ATOMIC_HASH_SIZE-1) ]))
+#  define ATOMIC_HASH(a) (&(__atomic_hash[ (((unsigned long) (a))/L1_CACHE_BYTES) & (ATOMIC_HASH_SIZE-1) ]))
 
 extern raw_spinlock_t __atomic_hash[ATOMIC_HASH_SIZE] __lock_aligned;
 
 
 #define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0)
 
-#define atomic_add(i,v)        ((void)(__atomic_add_return( ((int)i),(v))))
-#define atomic_sub(i,v)        ((void)(__atomic_add_return(-((int)i),(v))))
+#define atomic_add(i,v)        ((void)(__atomic_add_return( ((int)(i)),(v))))
+#define atomic_sub(i,v)        ((void)(__atomic_add_return(-((int)(i)),(v))))
 #define atomic_inc(v)  ((void)(__atomic_add_return(   1,(v))))
 #define atomic_dec(v)  ((void)(__atomic_add_return(  -1,(v))))
 
-#define atomic_add_return(i,v) (__atomic_add_return( ((int)i),(v)))
-#define atomic_sub_return(i,v) (__atomic_add_return(-((int)i),(v)))
+#define atomic_add_return(i,v) (__atomic_add_return( ((int)(i)),(v)))
+#define atomic_sub_return(i,v) (__atomic_add_return(-((int)(i)),(v)))
 #define atomic_inc_return(v)   (__atomic_add_return(   1,(v)))
 #define atomic_dec_return(v)   (__atomic_add_return(  -1,(v)))
 
        return v->counter;
 }
 
-#define atomic64_add(i,v)      ((void)(__atomic64_add_return( ((s64)i),(v))))
-#define atomic64_sub(i,v)      ((void)(__atomic64_add_return(-((s64)i),(v))))
+#define atomic64_add(i,v)      ((void)(__atomic64_add_return( ((s64)(i)),(v))))
+#define atomic64_sub(i,v)      ((void)(__atomic64_add_return(-((s64)(i)),(v))))
 #define atomic64_inc(v)                ((void)(__atomic64_add_return(   1,(v))))
 #define atomic64_dec(v)                ((void)(__atomic64_add_return(  -1,(v))))
 
-#define atomic64_add_return(i,v)       (__atomic64_add_return( ((s64)i),(v)))
-#define atomic64_sub_return(i,v)       (__atomic64_add_return(-((s64)i),(v)))
+#define atomic64_add_return(i,v)       (__atomic64_add_return( ((s64)(i)),(v)))
+#define atomic64_sub_return(i,v)       (__atomic64_add_return(-((s64)(i)),(v)))
 #define atomic64_inc_return(v)         (__atomic64_add_return(   1,(v)))
 #define atomic64_dec_return(v)         (__atomic64_add_return(  -1,(v)))