dma-mapping: use offset_in_page macro

Use offset_in_page macro instead of (addr & ~PAGE_MASK). Signed-off-by: Geliang Tang <[email protected]> Acked-by: Will Deacon <[email protected]> Cc: Christian Borntraeger <[email protected]> Cc: Joerg Roedel <[email protected]> Cc: Sebastian Ott <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
chewitt · Jan 21, 2016 · 8e99469 · 8e99469
1 parent 20d666e
commit 8e99469
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h
@@ -129,10 +129,10 @@ static inline dma_addr_t dma_map_single_attrs(struct device *dev, void *ptr,
 	kmemcheck_mark_initialized(ptr, size);
 	BUG_ON(!valid_dma_direction(dir));
 	addr = ops->map_page(dev, virt_to_page(ptr),
-			     (unsigned long)ptr & ~PAGE_MASK, size,
+			     offset_in_page(ptr), size,
 			     dir, attrs);
 	debug_dma_map_page(dev, virt_to_page(ptr),
-			   (unsigned long)ptr & ~PAGE_MASK, size,
+			   offset_in_page(ptr), size,
 			   dir, addr, true);
 	return addr;
 }