[PATCH] mm: fill arch atomic64 gaps

alpha, sparc64, x86_64 are each missing some primitives from their atomic64
support: fill in the gaps I've noticed by extrapolating asm, follow the
groupings in each file. But powerpc and parisc still lack atomic64.

Signed-off-by: Hugh Dickins <[e-mail]>
Cc: Richard Henderson <[e-mail]>
Cc: Ivan Kokshaysky <[e-mail]>
Cc: "David S. Miller" <[e-mail]>
Cc: Andi Kleen <[e-mail]>
Cc: Nick Piggin <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

include/asm-alpha/atomic.h

···
 	return result;
 }
 
-#define atomic_add_negative(a, v)	(atomic_add_return((a), (v)) < 0)
-
 static __inline__ long atomic64_add_return(long i, atomic64_t * v)
 {
 	long temp, result;
···
 })
 #define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0)
 
+#define atomic_add_negative(a, v) (atomic_add_return((a), (v)) < 0)
+#define atomic64_add_negative(a, v) (atomic64_add_return((a), (v)) < 0)
+
 #define atomic_dec_return(v) atomic_sub_return(1,(v))
 #define atomic64_dec_return(v) atomic64_sub_return(1,(v))
 
···
 #define atomic64_sub_and_test(i,v) (atomic64_sub_return((i), (v)) == 0)
 
 #define atomic_inc_and_test(v) (atomic_add_return(1, (v)) == 0)
+#define atomic64_inc_and_test(v) (atomic64_add_return(1, (v)) == 0)
+
 #define atomic_dec_and_test(v) (atomic_sub_return(1, (v)) == 0)
 #define atomic64_dec_and_test(v) (atomic64_sub_return(1, (v)) == 0)
 

include/asm-sparc64/atomic.h

···
  * other cases.
  */
 #define atomic_inc_and_test(v) (atomic_inc_return(v) == 0)
+#define atomic64_inc_and_test(v) (atomic64_inc_return(v) == 0)
 
 #define atomic_sub_and_test(i, v) (atomic_sub_ret(i, v) == 0)
 #define atomic64_sub_and_test(i, v) (atomic64_sub_ret(i, v) == 0)

include/asm-x86_64/atomic.h

···
 
 /**
  * atomic_add_negative - add and test if negative
- * @v: pointer of type atomic_t
  * @i: integer value to add
+ * @v: pointer of type atomic_t
  * 
  * Atomically adds @i to @v and returns true
  * if the result is negative, or false when
···
 		:"ir" (i), "m" (v->counter) : "memory");
 	return c;
 }
+
+/**
+ * atomic_add_return - add and return
+ * @i: integer value to add
+ * @v: pointer of type atomic_t
+ *
+ * Atomically adds @i to @v and returns @i + @v
+ */
+static __inline__ int atomic_add_return(int i, atomic_t *v)
+{
+	int __i = i;
+	__asm__ __volatile__(
+		LOCK "xaddl %0, %1;"
+		:"=r"(i)
+		:"m"(v->counter), "0"(i));
+	return i + __i;
+}
+
+static __inline__ int atomic_sub_return(int i, atomic_t *v)
+{
+	return atomic_add_return(-i,v);
+}
+
+#define atomic_inc_return(v)  (atomic_add_return(1,v))
+#define atomic_dec_return(v)  (atomic_sub_return(1,v))
 
 /* An 64bit atomic type */
 
···
 
 /**
  * atomic64_add_negative - add and test if negative
- * @v: pointer to atomic64_t
  * @i: integer value to add
+ * @v: pointer to type atomic64_t
  *
  * Atomically adds @i to @v and returns true
  * if the result is negative, or false when
  * result is greater than or equal to zero.
  */
-static __inline__ long atomic64_add_negative(long i, atomic64_t *v)
+static __inline__ int atomic64_add_negative(long i, atomic64_t *v)
 {
 	unsigned char c;
 
···
 }
 
 /**
- * atomic_add_return - add and return
- * @v: pointer of type atomic_t
+ * atomic64_add_return - add and return
  * @i: integer value to add
+ * @v: pointer to type atomic64_t
  *
  * Atomically adds @i to @v and returns @i + @v
  */
-static __inline__ int atomic_add_return(int i, atomic_t *v)
+static __inline__ long atomic64_add_return(long i, atomic64_t *v)
 {
-	int __i = i;
+	long __i = i;
 	__asm__ __volatile__(
-		LOCK "xaddl %0, %1;"
+		LOCK "xaddq %0, %1;"
 		:"=r"(i)
 		:"m"(v->counter), "0"(i));
 	return i + __i;
 }
 
-static __inline__ int atomic_sub_return(int i, atomic_t *v)
+static __inline__ long atomic64_sub_return(long i, atomic64_t *v)
 {
-	return atomic_add_return(-i,v);
+	return atomic64_add_return(-i,v);
 }
+
+#define atomic64_inc_return(v)  (atomic64_add_return(1,v))
+#define atomic64_dec_return(v)  (atomic64_sub_return(1,v))
 
 #define atomic_cmpxchg(v, old, new) ((int)cmpxchg(&((v)->counter), old, new))
 
···
 	c != (u);						\
 })
 #define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0)
-
-#define atomic_inc_return(v)  (atomic_add_return(1,v))
-#define atomic_dec_return(v)  (atomic_sub_return(1,v))
 
 /* These are x86-specific, used by some header files */
 #define atomic_clear_mask(mask, addr) \