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-rw-r--r--include/linux/io.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/io.h b/include/linux/io.h
index 986f2bf..04cce4d 100644
--- a/include/linux/io.h
+++ b/include/linux/io.h
@@ -111,6 +111,13 @@ static inline void arch_phys_wc_del(int handle)
}
#define arch_phys_wc_add arch_phys_wc_add
+#ifndef arch_phys_wc_index
+static inline int arch_phys_wc_index(int handle)
+{
+ return -1;
+}
+#define arch_phys_wc_index arch_phys_wc_index
+#endif
#endif
#endif /* _LINUX_IO_H */
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