[RFC][PATCH 03/24] arm: Provide atomic_{or,xor,and}

Peter Zijlstra
2015-07-09T17:57:53Z

[-- Attachment #1: peterz-arm-atomic_logic_ops.patch --]
[-- Type: text/plain, Size: 852 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/arm/include/asm/atomic.h | 6 ++++++
1 file changed, 6 insertions(+)

--- a/arch/arm/include/asm/atomic.h
+++ b/arch/arm/include/asm/atomic.h
@@ -193,6 +193,9 @@ static inline int __atomic_add_unless(at

ATOMIC_OPS(add, +=, add)
ATOMIC_OPS(sub, -=, sub)
+ATOMIC_OP(and, &=, and)
+ATOMIC_OP(or, |=, orr)
+ATOMIC_OP(xor, ^=, eor)

#undef ATOMIC_OPS
#undef ATOMIC_OP_RETURN
@@ -320,6 +323,9 @@ static inline long long atomic64_##op##_

ATOMIC64_OPS(add, adds, adc)
ATOMIC64_OPS(sub, subs, sbc)
+ATOMIC64_OP(and, and, and)
+ATOMIC64_OP(or, or, or)
+ATOMIC64_OP(xor, eor, eor)

#undef ATOMIC64_OPS
#undef ATOMIC64_OP_RETURN