5 files changed, 45 insertions, 0 deletions
diff --git a/backport-include/linux/kernel.h b/backport-include/linux/kernel.h
index 3ddeb13..4b2f153 100644
--- a/backport-include/linux/kernel.h
+++ b/backport-include/linux/kernel.h
@@ -206,6 +206,10 @@ int __must_check kstrtobool_from_user(const char __user *s, size_t count, bool *
 
 #endif
 
+#if LINUX_VERSION_IS_LESS(4,5,0)
+const char *kvasprintf_const(gfp_t gfp, const char *fmt, va_list args);
+#endif /* < 4.4 */
+
 #if LINUX_VERSION_IS_LESS(3,14,0)
 static inline u32 reciprocal_scale(u32 val, u32 ep_ro)
 {
diff --git a/backport-include/linux/kref.h b/backport-include/linux/kref.h
new file mode 100644
index 0000000..631488f
--- /dev/null
+++ b/backport-include/linux/kref.h
@@ -0,0 +1,13 @@
+#ifndef __BACKPORT_LINUX_KREF_H
+#define __BACKPORT_LINUX_KREF_H
+#include_next <linux/kref.h>
+
+#if LINUX_VERSION_IS_LESS(4,11,0)
+#include <linux/refcount.h>
+static inline unsigned int kref_read(const struct kref *kref)
+{
+        return refcount_read((const refcount_t *)&kref->refcount);
+}
+#endif /* < 4.11 */
+
+#endif /* __BACKPORT_LINUX_KREF_H */
diff --git a/backport-include/linux/skbuff.h b/backport-include/linux/skbuff.h
index 034206b..af40b8d 100644
--- a/backport-include/linux/skbuff.h
+++ b/backport-include/linux/skbuff.h
@@ -371,6 +371,23 @@ static inline void skb_put_u8(struct sk_buff *skb, u8 val)
 {
 	*(u8 *)skb_put(skb, 1) = val;
 }
+
+static inline void *__skb_put_zero(struct sk_buff *skb, unsigned int len)
+{
+	void *tmp = __skb_put(skb, len);
+
+	memset(tmp, 0, len);
+	return tmp;
+}
+
+static inline void *__skb_put_data(struct sk_buff *skb, const void *data,
+				   unsigned int len)
+{
+	void *tmp = __skb_put(skb, len);
+
+	memcpy(tmp, data, len);
+	return tmp;
+}
 #endif
 
 #endif /* __BACKPORT_SKBUFF_H */
diff --git a/backport-include/linux/string.h b/backport-include/linux/string.h
index b85d9c7..b1d26d1 100644
--- a/backport-include/linux/string.h
+++ b/backport-include/linux/string.h
@@ -29,4 +29,8 @@ void memzero_explicit(void *s, size_t count);
 ssize_t strscpy(char *dest, const char *src, size_t count);
 #endif
 
+#if LINUX_VERSION_IS_LESS(4,0,0)
+extern void kfree_const(const void *x);
+extern const char *kstrdup_const(const char *s, gfp_t gfp);
+#endif
 #endif /* __BACKPORT_LINUX_STRING_H */
diff --git a/backport-include/linux/uio.h b/backport-include/linux/uio.h
new file mode 100644
index 0000000..fe27e68
--- /dev/null
+++ b/backport-include/linux/uio.h
@@ -0,0 +1,7 @@
+#ifndef _BP_LINUX_UIO_H
+#define _BP_LINUX_UIO_H
+#include_next <linux/uio.h>
+
+bool _copy_from_iter_full(void *addr, size_t bytes, struct iov_iter *i);
+
+#endif /* _BP_LINUX_UIO_H */