sparc32: Add cmpxchg64().
This fixes the build with i40e driver enabled.
Reported-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/arch/sparc/lib/atomic32.c b/arch/sparc/lib/atomic32.c
index 2c37332..ddacb5a 100644
--- a/arch/sparc/lib/atomic32.c
+++ b/arch/sparc/lib/atomic32.c
@@ -172,6 +172,20 @@ unsigned long __cmpxchg_u32(volatile u32 *ptr, u32 old, u32 new)
}
EXPORT_SYMBOL(__cmpxchg_u32);
+u64 __cmpxchg_u64(u64 *ptr, u64 old, u64 new)
+{
+ unsigned long flags;
+ u64 prev;
+
+ spin_lock_irqsave(ATOMIC_HASH(ptr), flags);
+ if ((prev = *ptr) == old)
+ *ptr = new;
+ spin_unlock_irqrestore(ATOMIC_HASH(ptr), flags);
+
+ return prev;
+}
+EXPORT_SYMBOL(__cmpxchg_u64);
+
unsigned long __xchg_u32(volatile u32 *ptr, u32 new)
{
unsigned long flags;