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-rw-r--r--include/linux/mmzone.h9
1 files changed, 9 insertions, 0 deletions
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 936dc0b6c226..aed44e9b5d89 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -1047,6 +1047,15 @@ static inline int is_highmem_idx(enum zone_type idx)
#endif
}
+#ifdef CONFIG_ZONE_DMA
+bool has_managed_dma(void);
+#else
+static inline bool has_managed_dma(void)
+{
+ return false;
+}
+#endif
+
/**
* is_highmem - helper function to quickly check if a struct zone is a
* highmem zone or not. This is an attempt to keep references