Merge branch 'for-3.7/core' of git://git.kernel.dk/linux-block

[can-eth-gw-linux.git] / lib / scatterlist.c

diff --git a/lib/scatterlist.c b/lib/scatterlist.c
index e76d85cf31755c6de5b9ca5898756254e0525845..3675452b23ca175b612489e362aa7274b75d96a5 100644 (file)
--- a/lib/scatterlist.c
+++ b/lib/scatterlist.c
@@ -38,6 +38,25 @@ struct scatterlist *sg_next(struct scatterlist *sg)
 }
 EXPORT_SYMBOL(sg_next);
 
+/**
+ * sg_nents - return total count of entries in scatterlist
+ * @sg:                The scatterlist
+ *
+ * Description:
+ * Allows to know how many entries are in sg, taking into acount
+ * chaining as well
+ *
+ **/
+int sg_nents(struct scatterlist *sg)
+{
+       int nents;
+       for (nents = 0; sg; sg = sg_next(sg))
+               nents++;
+       return nents;
+}
+EXPORT_SYMBOL(sg_nents);
+
+
 /**
  * sg_last - return the last scatterlist entry in a list
  * @sgl:       First entry in the scatterlist