[01/31] scatterlist: add sg_pfn and sg_has_page helpers

Commit Message

Christoph Hellwig Aug. 12, 2015, 7:05 a.m. UTC

Signed-off-by: Christoph Hellwig <[e-mail]>
---
 include/linux/scatterlist.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

Patch

diff --git a/include/linux/scatterlist.h b/include/linux/scatterlist.h
index 9b1ef0c..b1056bf 100644
--- a/include/linux/scatterlist.h
+++ b/include/linux/scatterlist.h
@@ -230,6 +230,16 @@  static inline dma_addr_t sg_phys(struct scatterlist *sg)
 	return page_to_phys(sg_page(sg)) + sg->offset;
 }
 
+static inline unsigned long sg_pfn(struct scatterlist *sg)
+{
+	return page_to_pfn(sg_page(sg));
+}
+
+static inline bool sg_has_page(struct scatterlist *sg)
+{
+	return true;
+}
+
 /**
  * sg_virt - Return virtual address of an sg entry
  * @sg:      SG entry