From: Johannes Berg <johannes.berg@xxxxxxxxx>
Some of the new fetch atomics are now required, add them by
using the _return ones and changing the value accordingly.
Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
---
backport/backport-include/linux/atomic.h | 32 ++++++++++++++++++++++++
1 file changed, 32 insertions(+)
diff --git a/backport/backport-include/linux/atomic.h b/backport/backport-include/linux/atomic.h
index 9ceb586e864a..6669831ca8a9 100644
--- a/backport/backport-include/linux/atomic.h
+++ b/backport/backport-include/linux/atomic.h
@@ -60,4 +60,36 @@ static inline int atomic_fetch_add_unless(atomic_t *v, int a, int u)
#endif
#endif
+#ifndef __atomic_pre_full_fence
+#define __atomic_pre_full_fence smp_mb__before_atomic
+#endif
+
+#ifndef __atomic_post_full_fence
+#define __atomic_post_full_fence smp_mb__after_atomic
+#endif
+
+#if LINUX_VERSION_IS_LESS(4,8,0)
+static inline int
+atomic_fetch_add(int i, atomic_t *v)
+{
+ return atomic_add_return(i, v) - i;
+}
+
+static inline int
+atomic_fetch_sub(int i, atomic_t *v)
+{
+ return atomic_sub_return(i, v) + i;
+}
+#endif
+
+#ifndef atomic_fetch_add_relaxed
+#define atomic_fetch_add_relaxed atomic_fetch_add
+#endif
+
+#ifndef atomic_fetch_sub_relaxed
+#define atomic_fetch_sub_acquire atomic_fetch_sub
+#define atomic_fetch_sub_release atomic_fetch_sub
+#define atomic_fetch_sub_relaxed atomic_fetch_sub
+#endif
+
#endif /* __BP_ATOMIC_H */
--
2.24.1
--
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