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authorPeter Zijlstra <peterz@infradead.org>2015-07-10 12:55:45 +0200
committerThomas Gleixner <tglx@linutronix.de>2015-07-27 14:06:24 +0200
commit73ada3700bbb0a4c7cc06ea8d74e93c689f90cdb (patch)
tree7080670f15d0087e409b3ed4ac0ce24829c0d7e1 /arch/h8300
parentb0d8003ef405c4148b703cdaab1171045c6c3bbd (diff)
downloadop-kernel-dev-73ada3700bbb0a4c7cc06ea8d74e93c689f90cdb.zip
op-kernel-dev-73ada3700bbb0a4c7cc06ea8d74e93c689f90cdb.tar.gz
h8300: 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. Also rework the atomic implementation in terms of CPP macros to avoid the typical repetition -- I seem to have missed this arch the last time around when I did that. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/h8300')
-rw-r--r--arch/h8300/include/asm/atomic.h135
1 files changed, 40 insertions, 95 deletions
diff --git a/arch/h8300/include/asm/atomic.h b/arch/h8300/include/asm/atomic.h
index 7ca73f8..f181f82 100644
--- a/arch/h8300/include/asm/atomic.h
+++ b/arch/h8300/include/asm/atomic.h
@@ -16,83 +16,54 @@
#include <linux/kernel.h>
-static inline int atomic_add_return(int i, atomic_t *v)
-{
- h8300flags flags;
- int ret;
-
- flags = arch_local_irq_save();
- ret = v->counter += i;
- arch_local_irq_restore(flags);
- return ret;
+#define ATOMIC_OP_RETURN(op, c_op) \
+static inline int atomic_##op##_return(int i, atomic_t *v) \
+{ \
+ h8300flags flags; \
+ int ret; \
+ \
+ flags = arch_local_irq_save(); \
+ ret = v->counter c_op i; \
+ arch_local_irq_restore(flags); \
+ return ret; \
}
-#define atomic_add(i, v) atomic_add_return(i, v)
-#define atomic_add_negative(a, v) (atomic_add_return((a), (v)) < 0)
-
-static inline int atomic_sub_return(int i, atomic_t *v)
-{
- h8300flags flags;
- int ret;
-
- flags = arch_local_irq_save();
- ret = v->counter -= i;
- arch_local_irq_restore(flags);
- return ret;
+#define ATOMIC_OP(op, c_op) \
+static inline void atomic_##op(int i, atomic_t *v) \
+{ \
+ h8300flags flags; \
+ \
+ flags = arch_local_irq_save(); \
+ v->counter c_op i; \
+ arch_local_irq_restore(flags); \
}
-#define atomic_sub(i, v) atomic_sub_return(i, v)
-#define atomic_sub_and_test(i, v) (atomic_sub_return(i, v) == 0)
+ATOMIC_OP_RETURN(add, +=)
+ATOMIC_OP_RETURN(sub, -=)
-static inline int atomic_inc_return(atomic_t *v)
-{
- h8300flags flags;
- int ret;
-
- flags = arch_local_irq_save();
- v->counter++;
- ret = v->counter;
- arch_local_irq_restore(flags);
- return ret;
-}
+#define CONFIG_ARCH_HAS_ATOMIC_OR
-#define atomic_inc(v) atomic_inc_return(v)
+ATOMIC_OP(and, &=)
+ATOMIC_OP(or, |=)
+ATOMIC_OP(xor, ^=)
-/*
- * atomic_inc_and_test - increment and test
- * @v: pointer of type atomic_t
- *
- * Atomically increments @v by 1
- * and returns true if the result is zero, or false for all
- * other cases.
- */
-#define atomic_inc_and_test(v) (atomic_inc_return(v) == 0)
+#undef ATOMIC_OP_RETURN
+#undef ATOMIC_OP
-static inline int atomic_dec_return(atomic_t *v)
-{
- h8300flags flags;
- int ret;
+#define atomic_add(i, v) (void)atomic_add_return(i, v)
+#define atomic_add_negative(a, v) (atomic_add_return((a), (v)) < 0)
- flags = arch_local_irq_save();
- --v->counter;
- ret = v->counter;
- arch_local_irq_restore(flags);
- return ret;
-}
+#define atomic_sub(i, v) (void)atomic_sub_return(i, v)
+#define atomic_sub_and_test(i, v) (atomic_sub_return(i, v) == 0)
-#define atomic_dec(v) atomic_dec_return(v)
+#define atomic_inc_return(v) atomic_add_return(1, v)
+#define atomic_dec_return(v) atomic_sub_return(1, v)
-static inline int atomic_dec_and_test(atomic_t *v)
-{
- h8300flags flags;
- int ret;
+#define atomic_inc(v) (void)atomic_inc_return(v)
+#define atomic_inc_and_test(v) (atomic_inc_return(v) == 0)
- flags = arch_local_irq_save();
- --v->counter;
- ret = v->counter;
- arch_local_irq_restore(flags);
- return ret == 0;
-}
+#define atomic_dec(v) (void)atomic_dec_return(v)
+#define atomic_dec_and_test(v) (atomic_dec_return(v) == 0)
static inline int atomic_cmpxchg(atomic_t *v, int old, int new)
{
@@ -120,40 +91,14 @@ static inline int __atomic_add_unless(atomic_t *v, int a, int u)
return ret;
}
-static inline void atomic_clear_mask(unsigned long mask, unsigned long *v)
+static inline __deprecated void atomic_clear_mask(unsigned int mask, atomic_t *v)
{
- unsigned char ccr;
- unsigned long tmp;
-
- __asm__ __volatile__("stc ccr,%w3\n\t"
- "orc #0x80,ccr\n\t"
- "mov.l %0,%1\n\t"
- "and.l %2,%1\n\t"
- "mov.l %1,%0\n\t"
- "ldc %w3,ccr"
- : "=m"(*v), "=r"(tmp)
- : "g"(~(mask)), "r"(ccr));
+ atomic_and(~mask, v);
}
-static inline void atomic_set_mask(unsigned long mask, unsigned long *v)
+static inline __deprecated void atomic_set_mask(unsigned int mask, atomic_t *v)
{
- unsigned char ccr;
- unsigned long tmp;
-
- __asm__ __volatile__("stc ccr,%w3\n\t"
- "orc #0x80,ccr\n\t"
- "mov.l %0,%1\n\t"
- "or.l %2,%1\n\t"
- "mov.l %1,%0\n\t"
- "ldc %w3,ccr"
- : "=m"(*v), "=r"(tmp)
- : "g"(~(mask)), "r"(ccr));
+ atomic_or(mask, v);
}
-/* Atomic operations are already serializing */
-#define smp_mb__before_atomic_dec() barrier()
-#define smp_mb__after_atomic_dec() barrier()
-#define smp_mb__before_atomic_inc() barrier()
-#define smp_mb__after_atomic_inc() barrier()
-
#endif /* __ARCH_H8300_ATOMIC __ */
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