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Diffstat (limited to 'arch/ia64/include/asm/atomic.h')
-rw-r--r--arch/ia64/include/asm/atomic.h192
1 files changed, 88 insertions, 104 deletions
diff --git a/arch/ia64/include/asm/atomic.h b/arch/ia64/include/asm/atomic.h
index 0f8bf48dadf3..0bf03501fe5c 100644
--- a/arch/ia64/include/asm/atomic.h
+++ b/arch/ia64/include/asm/atomic.h
@@ -21,68 +21,100 @@
#define ATOMIC_INIT(i) { (i) }
#define ATOMIC64_INIT(i) { (i) }
-#define atomic_read(v) (*(volatile int *)&(v)->counter)
-#define atomic64_read(v) (*(volatile long *)&(v)->counter)
+#define atomic_read(v) ACCESS_ONCE((v)->counter)
+#define atomic64_read(v) ACCESS_ONCE((v)->counter)
#define atomic_set(v,i) (((v)->counter) = (i))
#define atomic64_set(v,i) (((v)->counter) = (i))
-static __inline__ int
-ia64_atomic_add (int i, atomic_t *v)
-{
- __s32 old, new;
- CMPXCHG_BUGCHECK_DECL
-
- do {
- CMPXCHG_BUGCHECK(v);
- old = atomic_read(v);
- new = old + i;
- } while (ia64_cmpxchg(acq, v, old, new, sizeof(atomic_t)) != old);
- return new;
+#define ATOMIC_OP(op, c_op) \
+static __inline__ int \
+ia64_atomic_##op (int i, atomic_t *v) \
+{ \
+ __s32 old, new; \
+ CMPXCHG_BUGCHECK_DECL \
+ \
+ do { \
+ CMPXCHG_BUGCHECK(v); \
+ old = atomic_read(v); \
+ new = old c_op i; \
+ } while (ia64_cmpxchg(acq, v, old, new, sizeof(atomic_t)) != old); \
+ return new; \
}
-static __inline__ long
-ia64_atomic64_add (__s64 i, atomic64_t *v)
-{
- __s64 old, new;
- CMPXCHG_BUGCHECK_DECL
-
- do {
- CMPXCHG_BUGCHECK(v);
- old = atomic64_read(v);
- new = old + i;
- } while (ia64_cmpxchg(acq, v, old, new, sizeof(atomic64_t)) != old);
- return new;
-}
+ATOMIC_OP(add, +)
+ATOMIC_OP(sub, -)
-static __inline__ int
-ia64_atomic_sub (int i, atomic_t *v)
-{
- __s32 old, new;
- CMPXCHG_BUGCHECK_DECL
-
- do {
- CMPXCHG_BUGCHECK(v);
- old = atomic_read(v);
- new = old - i;
- } while (ia64_cmpxchg(acq, v, old, new, sizeof(atomic_t)) != old);
- return new;
-}
+#undef ATOMIC_OP
-static __inline__ long
-ia64_atomic64_sub (__s64 i, atomic64_t *v)
-{
- __s64 old, new;
- CMPXCHG_BUGCHECK_DECL
-
- do {
- CMPXCHG_BUGCHECK(v);
- old = atomic64_read(v);
- new = old - i;
- } while (ia64_cmpxchg(acq, v, old, new, sizeof(atomic64_t)) != old);
- return new;
+#define atomic_add_return(i,v) \
+({ \
+ int __ia64_aar_i = (i); \
+ (__builtin_constant_p(i) \
+ && ( (__ia64_aar_i == 1) || (__ia64_aar_i == 4) \
+ || (__ia64_aar_i == 8) || (__ia64_aar_i == 16) \
+ || (__ia64_aar_i == -1) || (__ia64_aar_i == -4) \
+ || (__ia64_aar_i == -8) || (__ia64_aar_i == -16))) \
+ ? ia64_fetch_and_add(__ia64_aar_i, &(v)->counter) \
+ : ia64_atomic_add(__ia64_aar_i, v); \
+})
+
+#define atomic_sub_return(i,v) \
+({ \
+ int __ia64_asr_i = (i); \
+ (__builtin_constant_p(i) \
+ && ( (__ia64_asr_i == 1) || (__ia64_asr_i == 4) \
+ || (__ia64_asr_i == 8) || (__ia64_asr_i == 16) \
+ || (__ia64_asr_i == -1) || (__ia64_asr_i == -4) \
+ || (__ia64_asr_i == -8) || (__ia64_asr_i == -16))) \
+ ? ia64_fetch_and_add(-__ia64_asr_i, &(v)->counter) \
+ : ia64_atomic_sub(__ia64_asr_i, v); \
+})
+
+#define ATOMIC64_OP(op, c_op) \
+static __inline__ long \
+ia64_atomic64_##op (__s64 i, atomic64_t *v) \
+{ \
+ __s64 old, new; \
+ CMPXCHG_BUGCHECK_DECL \
+ \
+ do { \
+ CMPXCHG_BUGCHECK(v); \
+ old = atomic64_read(v); \
+ new = old c_op i; \
+ } while (ia64_cmpxchg(acq, v, old, new, sizeof(atomic64_t)) != old); \
+ return new; \
}
+ATOMIC64_OP(add, +)
+ATOMIC64_OP(sub, -)
+
+#undef ATOMIC64_OP
+
+#define atomic64_add_return(i,v) \
+({ \
+ long __ia64_aar_i = (i); \
+ (__builtin_constant_p(i) \
+ && ( (__ia64_aar_i == 1) || (__ia64_aar_i == 4) \
+ || (__ia64_aar_i == 8) || (__ia64_aar_i == 16) \
+ || (__ia64_aar_i == -1) || (__ia64_aar_i == -4) \
+ || (__ia64_aar_i == -8) || (__ia64_aar_i == -16))) \
+ ? ia64_fetch_and_add(__ia64_aar_i, &(v)->counter) \
+ : ia64_atomic64_add(__ia64_aar_i, v); \
+})
+
+#define atomic64_sub_return(i,v) \
+({ \
+ long __ia64_asr_i = (i); \
+ (__builtin_constant_p(i) \
+ && ( (__ia64_asr_i == 1) || (__ia64_asr_i == 4) \
+ || (__ia64_asr_i == 8) || (__ia64_asr_i == 16) \
+ || (__ia64_asr_i == -1) || (__ia64_asr_i == -4) \
+ || (__ia64_asr_i == -8) || (__ia64_asr_i == -16))) \
+ ? ia64_fetch_and_add(-__ia64_asr_i, &(v)->counter) \
+ : ia64_atomic64_sub(__ia64_asr_i, v); \
+})
+
#define atomic_cmpxchg(v, old, new) (cmpxchg(&((v)->counter), old, new))
#define atomic_xchg(v, new) (xchg(&((v)->counter), new))
@@ -123,30 +155,6 @@ static __inline__ long atomic64_add_unless(atomic64_t *v, long a, long u)
#define atomic64_inc_not_zero(v) atomic64_add_unless((v), 1, 0)
-#define atomic_add_return(i,v) \
-({ \
- int __ia64_aar_i = (i); \
- (__builtin_constant_p(i) \
- && ( (__ia64_aar_i == 1) || (__ia64_aar_i == 4) \
- || (__ia64_aar_i == 8) || (__ia64_aar_i == 16) \
- || (__ia64_aar_i == -1) || (__ia64_aar_i == -4) \
- || (__ia64_aar_i == -8) || (__ia64_aar_i == -16))) \
- ? ia64_fetch_and_add(__ia64_aar_i, &(v)->counter) \
- : ia64_atomic_add(__ia64_aar_i, v); \
-})
-
-#define atomic64_add_return(i,v) \
-({ \
- long __ia64_aar_i = (i); \
- (__builtin_constant_p(i) \
- && ( (__ia64_aar_i == 1) || (__ia64_aar_i == 4) \
- || (__ia64_aar_i == 8) || (__ia64_aar_i == 16) \
- || (__ia64_aar_i == -1) || (__ia64_aar_i == -4) \
- || (__ia64_aar_i == -8) || (__ia64_aar_i == -16))) \
- ? ia64_fetch_and_add(__ia64_aar_i, &(v)->counter) \
- : ia64_atomic64_add(__ia64_aar_i, v); \
-})
-
/*
* Atomically add I to V and return TRUE if the resulting value is
* negative.
@@ -163,30 +171,6 @@ atomic64_add_negative (__s64 i, atomic64_t *v)
return atomic64_add_return(i, v) < 0;
}
-#define atomic_sub_return(i,v) \
-({ \
- int __ia64_asr_i = (i); \
- (__builtin_constant_p(i) \
- && ( (__ia64_asr_i == 1) || (__ia64_asr_i == 4) \
- || (__ia64_asr_i == 8) || (__ia64_asr_i == 16) \
- || (__ia64_asr_i == -1) || (__ia64_asr_i == -4) \
- || (__ia64_asr_i == -8) || (__ia64_asr_i == -16))) \
- ? ia64_fetch_and_add(-__ia64_asr_i, &(v)->counter) \
- : ia64_atomic_sub(__ia64_asr_i, v); \
-})
-
-#define atomic64_sub_return(i,v) \
-({ \
- long __ia64_asr_i = (i); \
- (__builtin_constant_p(i) \
- && ( (__ia64_asr_i == 1) || (__ia64_asr_i == 4) \
- || (__ia64_asr_i == 8) || (__ia64_asr_i == 16) \
- || (__ia64_asr_i == -1) || (__ia64_asr_i == -4) \
- || (__ia64_asr_i == -8) || (__ia64_asr_i == -16))) \
- ? ia64_fetch_and_add(-__ia64_asr_i, &(v)->counter) \
- : ia64_atomic64_sub(__ia64_asr_i, v); \
-})
-
#define atomic_dec_return(v) atomic_sub_return(1, (v))
#define atomic_inc_return(v) atomic_add_return(1, (v))
#define atomic64_dec_return(v) atomic64_sub_return(1, (v))
@@ -199,13 +183,13 @@ atomic64_add_negative (__s64 i, atomic64_t *v)
#define atomic64_dec_and_test(v) (atomic64_sub_return(1, (v)) == 0)
#define atomic64_inc_and_test(v) (atomic64_add_return(1, (v)) == 0)
-#define atomic_add(i,v) atomic_add_return((i), (v))
-#define atomic_sub(i,v) atomic_sub_return((i), (v))
+#define atomic_add(i,v) (void)atomic_add_return((i), (v))
+#define atomic_sub(i,v) (void)atomic_sub_return((i), (v))
#define atomic_inc(v) atomic_add(1, (v))
#define atomic_dec(v) atomic_sub(1, (v))
-#define atomic64_add(i,v) atomic64_add_return((i), (v))
-#define atomic64_sub(i,v) atomic64_sub_return((i), (v))
+#define atomic64_add(i,v) (void)atomic64_add_return((i), (v))
+#define atomic64_sub(i,v) (void)atomic64_sub_return((i), (v))
#define atomic64_inc(v) atomic64_add(1, (v))
#define atomic64_dec(v) atomic64_sub(1, (v))
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