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sparc: Provide atomic_{or,xor,and} 

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>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Peter Zijlstra 2014-04-23 19:40:25 +02:00 committed by Thomas Gleixner
parent 658aa51459
commit 304a0d699a
5 changed files with 38 additions and 3 deletions
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4
arch/sparc/include/asm/atomic_32.h
View File

@ -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);

6
arch/sparc/include/asm/atomic_64.h
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@ -33,6 +33,12 @@ long atomic64_##op##_return(long, atomic64_t *);
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

22
arch/sparc/lib/atomic32.c
View File

@ -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)

6
arch/sparc/lib/atomic_64.S
View File

@ -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

3
arch/sparc/lib/ksyms.c
View File

@ -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
#undef ATOMIC_OP_RETURN