From 87d308708712ff6075c4dd54b0519b47fdad8816 Mon Sep 17 00:00:00 2001
From: Oleksandr Suvorov <oleksandr.suvorov@toradex.com>
Date: Thu, 26 Mar 2020 12:44:27 +0200
Subject: Backports v5.4.27

Backports generated by toradex backports f6e8852f1ef28e6d3c9bae8400eb6a87a6b0c3e7
against mainline kernel tag v5.4.27

Signed-off-by: Oleksandr Suvorov <oleksandr.suvorov@toradex.com>
---
 backport-include/linux/list.h | 91 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 91 insertions(+)
 create mode 100644 backport-include/linux/list.h

(limited to 'backport-include/linux/list.h')

diff --git a/backport-include/linux/list.h b/backport-include/linux/list.h
new file mode 100644
index 0000000..13ab976
--- /dev/null
+++ b/backport-include/linux/list.h
@@ -0,0 +1,91 @@
+#ifndef __BACKPORT_LIST_H
+#define __BACKPORT_LIST_H
+#include_next <linux/list.h>
+#include <linux/version.h>
+
+#if LINUX_VERSION_IS_LESS(3,9,0)
+/**
+ * backport:
+ *
+ * commit 0bbacca7c3911451cea923b0ad6389d58e3d9ce9
+ * Author: Sasha Levin <sasha.levin@oracle.com>
+ * Date:   Thu Feb 7 12:32:18 2013 +1100
+ *
+ *     hlist: drop the node parameter from iterators
+ */
+#include <backport/magic.h>
+
+#undef hlist_entry_safe
+#define hlist_entry_safe(ptr, type, member) \
+	({ typeof(ptr) ____ptr = (ptr); \
+	   ____ptr ? hlist_entry(____ptr, type, member) : NULL; \
+	})
+
+#define hlist_for_each_entry4(tpos, pos, head, member)			\
+	for (pos = (head)->first;					\
+	     pos &&							\
+		({ tpos = hlist_entry(pos, typeof(*tpos), member); 1;});\
+	     pos = pos->next)
+
+#define hlist_for_each_entry_safe5(tpos, pos, n, head, member)		\
+	for (pos = (head)->first;					\
+	     pos && ({ n = pos->next; 1; }) &&				\
+		({ tpos = hlist_entry(pos, typeof(*tpos), member); 1;});\
+	     pos = n)
+
+#define hlist_for_each_entry3(pos, head, member)				\
+	for (pos = hlist_entry_safe((head)->first, typeof(*(pos)), member);	\
+	     pos;								\
+	     pos = hlist_entry_safe((pos)->member.next, typeof(*(pos)), member))
+
+#define hlist_for_each_entry_safe4(pos, n, head, member) 			\
+	for (pos = hlist_entry_safe((head)->first, typeof(*pos), member);	\
+	     pos && ({ n = pos->member.next; 1; });				\
+	     pos = hlist_entry_safe(n, typeof(*pos), member))
+
+#undef hlist_for_each_entry
+#define hlist_for_each_entry(...) \
+	macro_dispatcher(hlist_for_each_entry, __VA_ARGS__)(__VA_ARGS__)
+#undef hlist_for_each_entry_safe
+#define hlist_for_each_entry_safe(...) \
+	macro_dispatcher(hlist_for_each_entry_safe, __VA_ARGS__)(__VA_ARGS__)
+
+#endif
+
+#ifndef list_first_entry_or_null
+/**
+ * list_first_entry_or_null - get the first element from a list
+ * @ptr:	the list head to take the element from.
+ * @type:	the type of the struct this is embedded in.
+ * @member:	the name of the list_struct within the struct.
+ *
+ * Note that if the list is empty, it returns NULL.
+ */
+#define list_first_entry_or_null(ptr, type, member) \
+	(!list_empty(ptr) ? list_first_entry(ptr, type, member) : NULL)
+#endif /* list_first_entry_or_null */
+
+#ifndef list_next_entry
+/**
+ * list_next_entry - get the next element in list
+ * @pos:	the type * to cursor
+ * @member:	the name of the list_struct within the struct.
+ */
+#define list_next_entry(pos, member) \
+	list_entry((pos)->member.next, typeof(*(pos)), member)
+#endif /* list_next_entry */
+
+#ifndef list_last_entry
+/**
+ * list_last_entry - get the last element from a list
+ * @ptr:	the list head to take the element from.
+ * @type:	the type of the struct this is embedded in.
+ * @member:	the name of the list_struct within the struct.
+ *
+ * Note, that list is expected to be not empty.
+ */
+#define list_last_entry(ptr, type, member) \
+	list_entry((ptr)->prev, type, member)
+#endif
+
+#endif /* __BACKPORT_LIST_H */
-- 
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