This was added in kernel 3.17 in commit efd342fb0031a1 ("of: Provide a
function to request and map memory")
Signed-off-by: Hauke Mehrtens <hauke@xxxxxxxxxx>
---
backport/backport-include/linux/io.h | 9 +++++++++
1 file changed, 9 insertions(+)
create mode 100644 backport/backport-include/linux/io.h
diff --git a/backport/backport-include/linux/io.h b/backport/backport-include/linux/io.h
new file mode 100644
index 00000000..78ae4650
--- /dev/null
+++ b/backport/backport-include/linux/io.h
@@ -0,0 +1,9 @@
+#ifndef __BP_LINUX_IO_H
+#define __BP_LINUX_IO_H
+#include_next <linux/io.h>
+
+#ifndef IOMEM_ERR_PTR
+#define IOMEM_ERR_PTR(err) (__force void __iomem *)ERR_PTR(err)
+#endif
+
+#endif /* __BP_LINUX_IO_H */
--
2.11.0
--
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