These functions are needed in UBI/UBIFS on ZynqMP platform (ARM64).
---
arch/arm/include/asm/atomic.h | 66 +++++++++++++++++++++++++++++++++++++++++++
1 file changed, 66 insertions(+)
diff --git a/arch/arm/include/asm/atomic.h b/arch/arm/include/asm/atomic.h
index 9b79506..57914fd 100644
--- a/arch/arm/include/asm/atomic.h
+++ b/arch/arm/include/asm/atomic.h
@@ -21,6 +21,11 @@
#endif
typedef struct { volatile int counter; } atomic_t;
+#if BITS_PER_LONG == 32
+typedef struct { volatile long long counter; } atomic64_t;
+#else /* BIT_PER_LONG == 32 */
+typedef struct { volatile long counter; } atomic64_t;
+#endif
#define ATOMIC_INIT(i) { (i) }
@@ -29,6 +34,8 @@ typedef struct { volatile int counter; } atomic_t;
#define atomic_read(v) ((v)->counter)
#define atomic_set(v,i) (((v)->counter) = (i))
+#define atomic64_read(v) atomic_read(v)
+#define atomic64_set(v,i) atomic_set(v,i)
static inline void atomic_add(int i, volatile atomic_t *v)
{
@@ -101,6 +108,65 @@ static inline void atomic_clear_mask(unsigned long mask,
unsigned long *addr)
local_irq_restore(flags);
}
+#if BITS_PER_LONG == 32
+
+static inline void atomic64_add(long long i, volatile atomic64_t *v)
+{
+ unsigned long flags = 0;
+
+ local_irq_save(flags);
+ v->counter += i;
+ local_irq_restore(flags);
+}
+
+static inline void atomic64_sub(long long i, volatile atomic64_t *v)
+{
+ unsigned long flags = 0;
+
+ local_irq_save(flags);
+ v->counter -= i;
+ local_irq_restore(flags);
+}
+
+#else /* BIT_PER_LONG == 32 */
+
+static inline void atomic64_add(long i, volatile atomic64_t *v)
+{
+ unsigned long flags = 0;
+
+ local_irq_save(flags);
+ v->counter += i;
+ local_irq_restore(flags);
+}
+
+static inline void atomic64_sub(long i, volatile atomic64_t *v)
+{
+ unsigned long flags = 0;
+
+ local_irq_save(flags);
+ v->counter -= i;
+ local_irq_restore(flags);
+}
+#endif
+
+static inline void atomic64_inc(volatile atomic64_t *v)
+{
+ unsigned long flags = 0;
+
+ local_irq_save(flags);
+ v->counter += 1;
+ local_irq_restore(flags);
+}
+
+static inline void atomic64_dec(volatile atomic64_t *v)
+{
+ unsigned long flags = 0;
+
+ local_irq_save(flags);
+ v->counter -= 1;
+ local_irq_restore(flags);
+}
+
/* Atomic operations are already serializing on ARM */
#define smp_mb__before_atomic_dec() barrier()
#define smp_mb__after_atomic_dec() barrier()
--
2.6.2
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