From: Johannes Berg <johannes.berg@xxxxxxxxx>
Currently, only page_ref_inc() is needed, so backport only that.
Change-Id: I7b4d7eb4ccccf61d0921ef28a40b6628e8f2c1f8
Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
---
backport/backport-include/linux/mm.h | 1 +
backport/backport-include/linux/page_ref.h | 13 +++++++++++++
2 files changed, 14 insertions(+)
create mode 100644 backport/backport-include/linux/page_ref.h
diff --git a/backport/backport-include/linux/mm.h b/backport/backport-include/linux/mm.h
index bac230364139..5b3cca6afb63 100644
--- a/backport/backport-include/linux/mm.h
+++ b/backport/backport-include/linux/mm.h
@@ -1,6 +1,7 @@
#ifndef __BACKPORT_MM_H
#define __BACKPORT_MM_H
#include_next <linux/mm.h>
+#include <linux/page_ref.h>
#ifndef VM_NODUMP
/*
diff --git a/backport/backport-include/linux/page_ref.h b/backport/backport-include/linux/page_ref.h
new file mode 100644
index 000000000000..0b890e9be415
--- /dev/null
+++ b/backport/backport-include/linux/page_ref.h
@@ -0,0 +1,13 @@
+#ifndef __BP_PAGE_REF_H
+#define __BP_PAGE_REF_H
+#include <linux/version.h>
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,6,0)
+#include_next <linux/page_ref.h>
+#else
+static inline void page_ref_inc(struct page *page)
+{
+ atomic_inc(&page->_count);
+}
+#endif
+
+#endif /* __BP_PAGE_REF_H */
--
2.8.0.rc3
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