[RFC][PATCH 08/24] ia64: Provide atomic_{or,xor,and}

Peter Zijlstra
2015-07-09T18:03:32Z

[-- Attachment #1: peterz-ia64-atomic_logic_ops.patch --]
[-- Type: text/plain, Size: 1733 bytes --]

Implement atomic logic ops -- atomic_{or,xor,and}.

These will replace the atomic_{set,clear}_mask functions that are
available on some archs.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---
arch/ia64/include/asm/atomic.h | 24 ++++++++++++++++++++----
1 file changed, 20 insertions(+), 4 deletions(-)

--- a/arch/ia64/include/asm/atomic.h
+++ b/arch/ia64/include/asm/atomic.h
@@ -45,8 +45,6 @@ ia64_atomic_##op (int i, atomic_t *v)
ATOMIC_OP(add, +)
ATOMIC_OP(sub, -)

-#undef ATOMIC_OP
-
#define atomic_add_return(i,v) \
({ \
int __ia64_aar_i = (i); \
@@ -71,6 +69,16 @@ ATOMIC_OP(sub, -)
: ia64_atomic_sub(__ia64_asr_i, v); \
})

+ATOMIC_OP(and, &)
+ATOMIC_OP(or, |)
+ATOMIC_OP(xor, ^)
+
+#define atomic_and(i,v) (void)ia64_atomic_and(i,v)
+#define atomic_or(i,v) (void)ia64_atomic_or(i,v)
+#define atomic_xor(i,v) (void)ia64_atomic_xor(i,v)
+
+#undef ATOMIC_OP
+
#define ATOMIC64_OP(op, c_op) \
static __inline__ long \
ia64_atomic64_##op (__s64 i, atomic64_t *v) \
@@ -89,8 +97,6 @@ ia64_atomic64_##op (__s64 i, atomic64_t
ATOMIC64_OP(add, +)
ATOMIC64_OP(sub, -)

-#undef ATOMIC64_OP
-
#define atomic64_add_return(i,v) \
({ \
long __ia64_aar_i = (i); \
@@ -115,6 +121,16 @@ ATOMIC64_OP(sub, -)
: ia64_atomic64_sub(__ia64_asr_i, v); \
})

+ATOMIC64_OP(and, &)
+ATOMIC64_OP(or, |)
+ATOMIC64_OP(xor, ^)
+
+#define atomic64_and(i,v) (void)ia64_atomic64_and(i,v)
+#define atomic64_or(i,v) (void)ia64_atomic64_or(i,v)
+#define atomic64_xor(i,v) (void)ia64_atomic64_xor(i,v)
+
+#undef ATOMIC64_OP
+
#define atomic_cmpxchg(v, old, new) (cmpxchg(&((v)->counter), old, new))
#define atomic_xchg(v, new) (xchg(&((v)->counter), new))