linux-kernel - [PATCH 01/31] scatterlist: add sg_pfn and sg_has

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Date:	Wed, 12 Aug 2015 09:05:20 +0200
From:	Christoph Hellwig <hch@....de>
To:	torvalds@...ux-foundation.org, axboe@...nel.dk
Cc:	dan.j.williams@...el.com, vgupta@...opsys.com,
	hskinnemoen@...il.com, egtvedt@...fundet.no, realmz6@...il.com,
	dhowells@...hat.com, monstr@...str.eu, x86@...nel.org,
	dwmw2@...radead.org, alex.williamson@...hat.com,
	grundler@...isc-linux.org, linux-kernel@...r.kernel.org,
	linux-arch@...r.kernel.org, linux-alpha@...r.kernel.org,
	linux-ia64@...r.kernel.org, linux-metag@...r.kernel.org,
	linux-mips@...ux-mips.org, linux-parisc@...r.kernel.org,
	linuxppc-dev@...ts.ozlabs.org, linux-s390@...r.kernel.org,
	sparclinux@...r.kernel.org, linux-xtensa@...ux-xtensa.org,
	linux-nvdimm@...1.01.org, linux-media@...r.kernel.org
Subject: [PATCH 01/31] scatterlist: add sg_pfn and sg_has_page helpers

Signed-off-by: Christoph Hellwig <hch@....de>
---
 include/linux/scatterlist.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

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
-- 
1.9.1

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