1 files changed, 29 insertions, 31 deletions

diff --git a/include/linux/scatterlist.h b/include/linux/scatterlist.h
index 32326c293d7b..259735044148 100644
--- a/include/linux/scatterlist.h
+++ b/include/linux/scatterlist.h
@@ -188,43 +188,23 @@ static inline void sg_chain(struct scatterlist *prv, unsigned int prv_nents,
 
 /**
  * sg_mark_end - Mark the end of the scatterlist
- * @sgl:        Scatterlist
- * @nents:      Number of entries in sgl
+ * @sg:          SG entryScatterlist
  *
  * Description:
- *   Marks the last entry as the termination point for sg_next()
+ *   Marks the passed in sg entry as the termination point for the sg
+ *   table. A call to sg_next() on this entry will return NULL.
  *
  **/
-static inline void sg_mark_end(struct scatterlist *sgl, unsigned int nents)
+static inline void sg_mark_end(struct scatterlist *sg)
 {
-        sgl[nents - 1].page_link = 0x02;
-}
-
-static inline void __sg_mark_end(struct scatterlist *sg)
-{
-        sg->page_link |= 0x02;
-}
-
-/**
- * sg_init_one - Initialize a single entry sg list
- * @sg:          SG entry
- * @buf:         Virtual address for IO
- * @buflen:      IO length
- *
- * Notes:
- *   This should not be used on a single entry that is part of a larger
- *   table. Use sg_init_table() for that.
- *
- **/
-static inline void sg_init_one(struct scatterlist *sg, const void *buf,
-                               unsigned int buflen)
-{
-        memset(sg, 0, sizeof(*sg));
 #ifdef CONFIG_DEBUG_SG
-        sg->sg_magic = SG_MAGIC;
+        BUG_ON(sg->sg_magic != SG_MAGIC);
 #endif
-        sg_mark_end(sg, 1);
-        sg_set_buf(sg, buf, buflen);
+        /*
+         * Set termination bit, clear potential chain bit
+         */
+        sg->page_link |= 0x02;
+        sg->page_link &= ~0x01;
 }
 
 /**
@@ -240,7 +220,6 @@ static inline void sg_init_one(struct scatterlist *sg, const void *buf,
 static inline void sg_init_table(struct scatterlist *sgl, unsigned int nents)
 {
         memset(sgl, 0, sizeof(*sgl) * nents);
-        sg_mark_end(sgl, nents);
 #ifdef CONFIG_DEBUG_SG
         {
                 unsigned int i;
@@ -248,6 +227,25 @@ static inline void sg_init_table(struct scatterlist *sgl, unsigned int nents)
                         sgl[i].sg_magic = SG_MAGIC;
         }
 #endif
+        sg_mark_end(&sgl[nents - 1]);
+}
+
+/**
+ * sg_init_one - Initialize a single entry sg list
+ * @sg:          SG entry
+ * @buf:         Virtual address for IO
+ * @buflen:      IO length
+ *
+ * Notes:
+ *   This should not be used on a single entry that is part of a larger
+ *   table. Use sg_init_table() for that.
+ *
+ **/
+static inline void sg_init_one(struct scatterlist *sg, const void *buf,
+                               unsigned int buflen)
+{
+        sg_init_table(sg, 1);
+        sg_set_buf(sg, buf, buflen);
 }
 
 /**