[PATCH 18/28] sparc: Provide atomic_{or,xor,and}

Peter Zijlstra
2015-07-16T17:32:37Z

[-- Attachment #1: peterz-sparc-atomic_logic_ops.patch --]
[-- Type: text/plain, Size: 3198 bytes --]

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

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

Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---
arch/sparc/include/asm/atomic_32.h | 4 ++++
arch/sparc/include/asm/atomic_64.h | 6 ++++++
arch/sparc/lib/atomic32.c | 22 +++++++++++++++++++---
arch/sparc/lib/atomic_64.S | 6 ++++++
arch/sparc/lib/ksyms.c | 3 +++
5 files changed, 38 insertions(+), 3 deletions(-)

--- a/arch/sparc/include/asm/atomic_32.h
+++ b/arch/sparc/include/asm/atomic_32.h
@@ -17,10 +17,14 @@
#include <asm/barrier.h>
#include <asm-generic/atomic64.h>

+#define CONFIG_ARCH_HAS_ATOMIC_OR

#define ATOMIC_INIT(i) { (i) }

int atomic_add_return(int, atomic_t *);
+void atomic_and(int, atomic_t *);
+void atomic_or(int, atomic_t *);
+void atomic_xor(int, atomic_t *);
int atomic_cmpxchg(atomic_t *, int, int);
int atomic_xchg(atomic_t *, int);
int __atomic_add_unless(atomic_t *, int, int);
--- a/arch/sparc/include/asm/atomic_64.h
+++ b/arch/sparc/include/asm/atomic_64.h
@@ -33,6 +33,12 @@ long atomic64_##op##_return(long, atomic
ATOMIC_OPS(add)
ATOMIC_OPS(sub)

+#define CONFIG_ARCH_HAS_ATOMIC_OR
+
+ATOMIC_OP(and)
+ATOMIC_OP(or)
+ATOMIC_OP(xor)
+
#undef ATOMIC_OPS
#undef ATOMIC_OP_RETURN
#undef ATOMIC_OP
--- a/arch/sparc/lib/atomic32.c
+++ b/arch/sparc/lib/atomic32.c
@@ -27,22 +27,38 @@ static DEFINE_SPINLOCK(dummy);

#endif /* SMP */

-#define ATOMIC_OP(op, cop) \
+#define ATOMIC_OP_RETURN(op, c_op) \
int atomic_##op##_return(int i, atomic_t *v) \
{ \
int ret; \
unsigned long flags; \
spin_lock_irqsave(ATOMIC_HASH(v), flags); \
\
- ret = (v->counter cop i); \
+ ret = (v->counter c_op i); \
\
spin_unlock_irqrestore(ATOMIC_HASH(v), flags); \
return ret; \
} \
EXPORT_SYMBOL(atomic_##op##_return);

-ATOMIC_OP(add, +=)
+#define ATOMIC_OP(op, c_op) \
+void atomic_##op(int i, atomic_t *v) \
+{ \
+ unsigned long flags; \
+ spin_lock_irqsave(ATOMIC_HASH(v), flags); \
+ \
+ v->counter c_op i; \
+ \
+ spin_unlock_irqrestore(ATOMIC_HASH(v), flags); \
+} \
+EXPORT_SYMBOL(atomic_##op);
+
+ATOMIC_OP_RETURN(add, +=)
+ATOMIC_OP(and, &=)
+ATOMIC_OP(or, |=)
+ATOMIC_OP(xor, ^=)

+#undef ATOMIC_OP_RETURN
#undef ATOMIC_OP

int atomic_xchg(atomic_t *v, int new)
--- a/arch/sparc/lib/atomic_64.S
+++ b/arch/sparc/lib/atomic_64.S
@@ -47,6 +47,9 @@ ENDPROC(atomic_##op##_return);

ATOMIC_OPS(add)
ATOMIC_OPS(sub)
+ATOMIC_OP(and)
+ATOMIC_OP(or)
+ATOMIC_OP(xor)

#undef ATOMIC_OPS
#undef ATOMIC_OP_RETURN
@@ -84,6 +87,9 @@ ENDPROC(atomic64_##op##_return);

ATOMIC64_OPS(add)
ATOMIC64_OPS(sub)
+ATOMIC64_OP(and)
+ATOMIC64_OP(or)
+ATOMIC64_OP(xor)

#undef ATOMIC64_OPS
#undef ATOMIC64_OP_RETURN
--- a/arch/sparc/lib/ksyms.c
+++ b/arch/sparc/lib/ksyms.c
@@ -111,6 +111,9 @@ EXPORT_SYMBOL(atomic64_##op##_return);

ATOMIC_OPS(add)
ATOMIC_OPS(sub)
+ATOMIC_OP(and)
+ATOMIC_OP(or)
+ATOMIC_OP(xor)

#undef ATOMIC_OPS