[PATCH 3/3] backports: empty define for __ro_after_init

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nl80211 now uses section qualifier __ro_after_init. However, this
is not available in kernels before v4.6. Neither is the section
itself hence adding an empty define in backports.

Signed-off-by: Arend van Spriel <arend.vanspriel@xxxxxxxxxxxx>
---
 backport/backport-include/linux/cache.h | 11 +++++++++++
 1 file changed, 11 insertions(+)
 create mode 100644 backport/backport-include/linux/cache.h

diff --git a/backport/backport-include/linux/cache.h b/backport/backport-include/linux/cache.h
new file mode 100644
index 0000000..9ea4a96
--- /dev/null
+++ b/backport/backport-include/linux/cache.h
@@ -0,0 +1,11 @@
+#ifndef _BACKPORT_CACHE_H
+#define _BACKPORT_CACHE_H
+
+#include_next <linux/cache.h>
+#include <linux/version.h>
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(4,6,0))
+#define __ro_after_init
+#endif
+
+#endif /* _BACKPORT_CACHE_H */
-- 
1.9.1

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