[PATCH 2/2] dma-mapping: remove dma_max_pfn

[Christoph Hellwig]

These days the DMA mapping code must bounce buffer for any not supported
address, and if they driver needs to optimize for natively supported
ranged it should use dma_get_required_mask.

Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
 arch/arm/include/asm/dma-mapping.h | 7 -------
 include/linux/dma-mapping.h        | 7 -------
 2 files changed, 14 deletions(-)

diff --git a/arch/arm/include/asm/dma-mapping.h b/arch/arm/include/asm/dma-mapping.h
index 03ba90ffc0f8..7e0486ad1318 100644
--- a/arch/arm/include/asm/dma-mapping.h
+++ b/arch/arm/include/asm/dma-mapping.h
@@ -89,13 +89,6 @@ static inline dma_addr_t virt_to_dma(struct device *dev, void *addr)
 }
 #endif
 
-/* The ARM override for dma_max_pfn() */
-static inline unsigned long dma_max_pfn(struct device *dev)
-{
-	return dma_to_pfn(dev, *dev->dma_mask);
-}
-#define dma_max_pfn(dev) dma_max_pfn(dev)
-
 /* do not use this function in a driver */
 static inline bool is_device_dma_coherent(struct device *dev)
 {
diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h
index 6309a721394b..8d13e28a8e07 100644
--- a/include/linux/dma-mapping.h
+++ b/include/linux/dma-mapping.h
@@ -729,13 +729,6 @@ static inline int dma_set_seg_boundary(struct device *dev, unsigned long mask)
 	return -EIO;
 }
 
-#ifndef dma_max_pfn
-static inline unsigned long dma_max_pfn(struct device *dev)
-{
-	return (*dev->dma_mask >> PAGE_SHIFT) + dev->dma_pfn_offset;
-}
-#endif
-
 static inline int dma_get_cache_alignment(void)
 {
 #ifdef ARCH_DMA_MINALIGN
-- 
2.20.1