iop3xx: surface the iop3xx DMA and AAU units to the iop-adma driver

[linux-2.6-omap-h63xx.git] / include / asm-x86_64 / atomic.h

diff --git a/include/asm-x86_64/atomic.h b/include/asm-x86_64/atomic.h
index 007e88d6d43f9ee32e73121c8ff17d3d47047bd1..f2e64634fa48c59a04d70a6d3b2e8e0f55b573cb 100644 (file)
--- a/include/asm-x86_64/atomic.h
+++ b/include/asm-x86_64/atomic.h
@@ -2,6 +2,7 @@
 #define __ARCH_X86_64_ATOMIC__
 
 #include <asm/alternative.h>
+#include <asm/cmpxchg.h>
 
 /* atomic_t should be 32 bit signed type */
 
@@ -21,7 +22,7 @@
  * on us. We need to use _exactly_ the address the user gave us,
  * not some alias that contains the same information.
  */
-typedef struct { volatile int counter; } atomic_t;
+typedef struct { int counter; } atomic_t;
 
 #define ATOMIC_INIT(i) { (i) }
 
@@ -189,9 +190,9 @@ static __inline__ int atomic_add_return(int i, atomic_t *v)
 {
        int __i = i;
        __asm__ __volatile__(
-               LOCK_PREFIX "xaddl %0, %1;"
-               :"=r"(i)
-               :"m"(v->counter), "0"(i));
+               LOCK_PREFIX "xaddl %0, %1"
+               :"+r" (i), "+m" (v->counter)
+               : : "memory");
        return i + __i;
 }
 
@@ -375,8 +376,8 @@ static __inline__ long atomic64_add_return(long i, atomic64_t *v)
        long __i = i;
        __asm__ __volatile__(
                LOCK_PREFIX "xaddq %0, %1;"
-               :"=r"(i)
-               :"m"(v->counter), "0"(i));
+               :"+r" (i), "+m" (v->counter)
+               : : "memory");
        return i + __i;
 }
 
@@ -388,7 +389,10 @@ static __inline__ long atomic64_sub_return(long i, atomic64_t *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))
+#define atomic64_cmpxchg(v, old, new) (cmpxchg(&((v)->counter), old, new))
+#define atomic64_xchg(v, new) (xchg(&((v)->counter), new))
+
+#define atomic_cmpxchg(v, old, new) (cmpxchg(&((v)->counter), old, new))
 #define atomic_xchg(v, new) (xchg(&((v)->counter), new))
 
 /**
@@ -400,22 +404,49 @@ static __inline__ long atomic64_sub_return(long i, atomic64_t *v)
  * Atomically adds @a to @v, so long as it was not @u.
  * Returns non-zero if @v was not @u, and zero otherwise.
  */
-#define atomic_add_unless(v, a, u)                             \
-({                                                             \
-       int c, old;                                             \
-       c = atomic_read(v);                                     \
-       for (;;) {                                              \
-               if (unlikely(c == (u)))                         \
-                       break;                                  \
-               old = atomic_cmpxchg((v), c, c + (a));          \
-               if (likely(old == c))                           \
-                       break;                                  \
-               c = old;                                        \
-       }                                                       \
-       c != (u);                                               \
-})
+static __inline__ int atomic_add_unless(atomic_t *v, int a, int u)
+{
+       int c, old;
+       c = atomic_read(v);
+       for (;;) {
+               if (unlikely(c == (u)))
+                       break;
+               old = atomic_cmpxchg((v), c, c + (a));
+               if (likely(old == c))
+                       break;
+               c = old;
+       }
+       return c != (u);
+}
+
 #define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0)
 
+/**
+ * atomic64_add_unless - add unless the number is a given value
+ * @v: pointer of type atomic64_t
+ * @a: the amount to add to v...
+ * @u: ...unless v is equal to u.
+ *
+ * Atomically adds @a to @v, so long as it was not @u.
+ * Returns non-zero if @v was not @u, and zero otherwise.
+ */
+static __inline__ int atomic64_add_unless(atomic64_t *v, long a, long u)
+{
+       long c, old;
+       c = atomic64_read(v);
+       for (;;) {
+               if (unlikely(c == (u)))
+                       break;
+               old = atomic64_cmpxchg((v), c, c + (a));
+               if (likely(old == c))
+                       break;
+               c = old;
+       }
+       return c != (u);
+}
+
+#define atomic64_inc_not_zero(v) atomic64_add_unless((v), 1, 0)
+
 /* These are x86-specific, used by some header files */
 #define atomic_clear_mask(mask, addr) \
 __asm__ __volatile__(LOCK_PREFIX "andl %0,%1" \