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List:       linux-backports
Subject:    [PATCH 3/6] backport: add atomic_fetch_add_unless()
From:       Luca Coelho <luca () coelho ! fi>
Date:       2019-03-15 14:33:15
Message-ID: 20190315143318.4714-4-luca () coelho ! fi
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From: Luca Coelho <luciano.coelho@intel.com>

The iwlwifi driver now needs this function.  Backport it.

Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
---
 backport/backport-include/linux/atomic.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/backport/backport-include/linux/atomic.h b/backport/backport-include/linux/atomic.h
index b4dd2e1d34f0..9ceb586e864a 100644
--- a/backport/backport-include/linux/atomic.h
+++ b/backport/backport-include/linux/atomic.h
@@ -51,4 +51,13 @@
 
 #endif /* atomic_try_cmpxchg_acquire */
 
+#if LINUX_VERSION_IS_LESS(4,19,0)
+#ifndef atomic_fetch_add_unless
+static inline int atomic_fetch_add_unless(atomic_t *v, int a, int u)
+{
+	return __atomic_add_unless(v, a, u);
+}
+#endif
+#endif
+
 #endif /* __BP_ATOMIC_H */
-- 
2.20.1

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