linux-kernel - [PATCH] dma/coherent: remove unused dma_get_device

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Date:   Tue, 17 Sep 2019 09:00:42 -0400
From:   Qian Cai <cai@....pw>
To:     hch@....de
Cc:     m.szyprowski@...sung.com, robin.murphy@....com,
        vladimir.murzin@....com, iommu@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org, Qian Cai <cai@....pw>
Subject: [PATCH] dma/coherent: remove unused dma_get_device_base()

dma_get_device_base() was first introduced in the commit c41f9ea998f3
("drivers: dma-coherent: Account dma_pfn_offset when used with device
tree"). Later, it was removed by the commit 43fc509c3efb ("dma-coherent:
introduce interface for default DMA pool")

Found by the -Wunused-function compilation warning.

Signed-off-by: Qian Cai <cai@....pw>
---
 kernel/dma/coherent.c | 9 ---------
 1 file changed, 9 deletions(-)

diff --git a/kernel/dma/coherent.c b/kernel/dma/coherent.c
index 29fd6590dc1e..909b38e1c29b 100644
--- a/kernel/dma/coherent.c
+++ b/kernel/dma/coherent.c
@@ -28,15 +28,6 @@ static inline struct dma_coherent_mem *dev_get_coherent_memory(struct device *de
 	return NULL;
 }
 
-static inline dma_addr_t dma_get_device_base(struct device *dev,
-					     struct dma_coherent_mem * mem)
-{
-	if (mem->use_dev_dma_pfn_offset)
-		return (mem->pfn_base - dev->dma_pfn_offset) << PAGE_SHIFT;
-	else
-		return mem->device_base;
-}
-
 static int dma_init_coherent_memory(phys_addr_t phys_addr,
 		dma_addr_t device_addr, size_t size,
 		struct dma_coherent_mem **mem)
-- 
1.8.3.1