dma-direct: avoid a forward declaration for phys_to_dma

Move dma_capable down a bit so that we don't need a forward declaration
for phys_to_dma.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>

include/linux/dma-direct.h

@@ -6,8 +6,6 @@
 #include <linux/memblock.h> /* for min_low_pfn */
 #include <linux/mem_encrypt.h>
 
-static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr);
-
 #ifdef CONFIG_ARCH_HAS_PHYS_TO_DMA
 #include <asm/dma-direct.h>
 #else
@@ -26,20 +24,6 @@ static inline phys_addr_t __dma_to_phys(struct device *dev, dma_addr_t dev_addr)
 }
 #endif /* !CONFIG_ARCH_HAS_PHYS_TO_DMA */
 
-static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
-{
-	dma_addr_t end = addr + size - 1;
-
-	if (!dev->dma_mask)
-		return false;
-
-	if (!IS_ENABLED(CONFIG_ARCH_DMA_ADDR_T_64BIT) &&
-	    min(addr, end) < phys_to_dma(dev, PFN_PHYS(min_low_pfn)))
-		return false;
-
-	return end <= min_not_zero(*dev->dma_mask, dev->bus_dma_mask);
-}
-
 #ifdef CONFIG_ARCH_HAS_FORCE_DMA_UNENCRYPTED
 bool force_dma_unencrypted(struct device *dev);
 #else
@@ -65,6 +49,20 @@ static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr)
 	return __sme_clr(__dma_to_phys(dev, daddr));
 }
 
+static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
+{
+	dma_addr_t end = addr + size - 1;
+
+	if (!dev->dma_mask)
+		return false;
+
+	if (!IS_ENABLED(CONFIG_ARCH_DMA_ADDR_T_64BIT) &&
+	    min(addr, end) < phys_to_dma(dev, PFN_PHYS(min_low_pfn)))
+		return false;
+
+	return end <= min_not_zero(*dev->dma_mask, dev->bus_dma_mask);
+}
+
 u64 dma_direct_get_required_mask(struct device *dev);
 void *dma_direct_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle,
 		gfp_t gfp, unsigned long attrs);