[RFC][PATCH 02/24] arc: Provide atomic_{or,xor,and}

Peter Zijlstra
2015-07-09T17:56:44Z

[-- Attachment #1: peterz-arc-atomic_logic_ops.patch --]
[-- Type: text/plain, Size: 1033 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/arc/include/asm/atomic.h | 14 ++++++++++++--
1 file changed, 12 insertions(+), 2 deletions(-)

--- a/arch/arc/include/asm/atomic.h
+++ b/arch/arc/include/asm/atomic.h
@@ -125,13 +125,23 @@ static inline int atomic_##op##_return(i
ATOMIC_OPS(add, +=, add)
ATOMIC_OPS(sub, -=, sub)
ATOMIC_OP(and, &=, and)
-
-#define atomic_clear_mask(mask, v) atomic_and(~(mask), (v))
+ATOMIC_OP(or, |=, or)
+ATOMIC_OP(xor, ^=, xor)

#undef ATOMIC_OPS
#undef ATOMIC_OP_RETURN
#undef ATOMIC_OP

+static inline __deprecated void atomic_clear_mask(unsigned int mask, atomic_t *v)
+{
+ atomic_and(~mask, v);
+}
+
+static inline __deprecated void atomic_set_mask(unsigned int mask, atomic_t *v)
+{
+ atomic_or(mask, v);
+}
+
/**
* __atomic_add_unless - add unless the number is a given value
* @v: pointer of type atomic_t