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-rw-r--r--include/xen/xen.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/xen/xen.h b/include/xen/xen.h
index 0e2156786ad2..19d032373de5 100644
--- a/include/xen/xen.h
+++ b/include/xen/xen.h
@@ -46,4 +46,8 @@ struct bio_vec;
bool xen_biovec_phys_mergeable(const struct bio_vec *vec1,
const struct bio_vec *vec2);
+#if defined(CONFIG_MEMORY_HOTPLUG) && defined(CONFIG_XEN_BALLOON)
+extern u64 xen_saved_max_mem_size;
+#endif
+
#endif /* _XEN_XEN_H */