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List: linux-backports
Subject: [PATCH 20/21] header: add dma_wmb()
From: Hauke Mehrtens <hauke () hauke-m ! de>
Date: 2017-08-21 22:28:16
Message-ID: 20170821222817.17376-21-hauke () hauke-m ! de
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This is used by the qtnfmac driver.
This was added in commit 1077fa36f23e259 ("arch: Add lightweight memory
barriers dma_rmb() and dma_wmb()")
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
---
backport/backport-include/asm/barrier.h | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/backport/backport-include/asm/barrier.h b/backport/backport-include/asm/barrier.h
index 9147fb05..9e1e1f11 100644
--- a/backport/backport-include/asm/barrier.h
+++ b/backport/backport-include/asm/barrier.h
@@ -11,6 +11,10 @@
#define dma_rmb() rmb()
#endif
+#ifndef dma_wmb
+#define dma_wmb() wmb()
+#endif
+
#ifndef smp_mb__after_atomic
#define smp_mb__after_atomic smp_mb__after_clear_bit
#endif
--
2.11.0
--
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