From: Felix Fietkau <nbd@nbd.name>
To: backports@vger.kernel.org
Cc: john@phrozen.org
Subject: [PATCH] backports: backport sg_init_marker()
Date: Thu, 6 Sep 2018 13:30:02 +0200 [thread overview]
Message-ID: <20180906113002.59425-1-nbd@nbd.name> (raw)
It is used by new mt76 changes
Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
backport/backport-include/linux/scatterlist.h | 23 +++++++++++++++++++
1 file changed, 23 insertions(+)
diff --git a/backport/backport-include/linux/scatterlist.h b/backport/backport-include/linux/scatterlist.h
index bfc74494..06934b6b 100644
--- a/backport/backport-include/linux/scatterlist.h
+++ b/backport/backport-include/linux/scatterlist.h
@@ -102,4 +102,27 @@ size_t sg_pcopy_from_buffer(struct scatterlist *sgl, unsigned int nents,
#endif /* LINUX_VERSION_IS_LESS(3, 11, 0) */
+#if LINUX_VERSION_IS_LESS(4, 17, 0)
+
+#define sg_init_marker LINUX_BACKPORT(sg_init_marker)
+/**
+ * sg_init_marker - Initialize markers in sg table
+ * @sgl: The SG table
+ * @nents: Number of entries in table
+ *
+ **/
+static inline void sg_init_marker(struct scatterlist *sgl,
+ unsigned int nents)
+{
+#ifdef CONFIG_DEBUG_SG
+ unsigned int i;
+
+ for (i = 0; i < nents; i++)
+ sgl[i].sg_magic = SG_MAGIC;
+#endif
+ sg_mark_end(&sgl[nents - 1]);
+}
+
+#endif /* LINUX_VERSION_IS_LESS(4, 17, 0) */
+
#endif /* __BACKPORT_SCATTERLIST_H */
--
2.17.0
--
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