linux-kernel - [PATCH 2/4] dma-mapping: Add wrapper function to set dma

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Message-Id: <1647533563-2170-3-git-send-email-mikelley@microsoft.com>
Date:   Thu, 17 Mar 2022 09:12:41 -0700
From:   Michael Kelley <mikelley@...rosoft.com>
To:     sthemmin@...rosoft.com, kys@...rosoft.com, haiyangz@...rosoft.com,
        wei.liu@...nel.org, decui@...rosoft.com, rafael@...nel.org,
        lenb@...nel.org, lorenzo.pieralisi@....com, robh@...nel.org,
        kw@...ux.com, bhelgass@...gle.com, hch@....de,
        m.szyprowski@...sung.com, robin.murphy@....com,
        linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-hyperv@...r.kernel.org, linux-pci@...r.kernel.org,
        iommu@...ts.linux-foundation.org
Cc:     mikelley@...rosoft.com
Subject: [PATCH 2/4] dma-mapping: Add wrapper function to set dma_coherent

Add a wrapper function to set dma_coherent, avoiding the need for
complex #ifdef's when setting it in architecture independent code.

Signed-off-by: Michael Kelley <mikelley@...rosoft.com>
---
 include/linux/dma-map-ops.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/include/linux/dma-map-ops.h b/include/linux/dma-map-ops.h
index 0d5b06b..3350e7a 100644
--- a/include/linux/dma-map-ops.h
+++ b/include/linux/dma-map-ops.h
@@ -254,11 +254,20 @@ static inline bool dev_is_dma_coherent(struct device *dev)
 {
 	return dev->dma_coherent;
 }
+static inline void dev_set_dma_coherent(struct device *dev,
+		bool coherent)
+{
+	dev->dma_coherent = coherent;
+}
 #else
 static inline bool dev_is_dma_coherent(struct device *dev)
 {
 	return true;
 }
+static inline void dev_set_dma_coherent(struct device *dev,
+		bool coherent)
+{
+}
 #endif /* CONFIG_ARCH_HAS_DMA_COHERENCE_H */
 
 void *arch_dma_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle,
-- 
1.8.3.1