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-rw-r--r--lib/prefix.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/prefix.h b/lib/prefix.h
index eb3ae3dafb..786c2bf7ea 100644
--- a/lib/prefix.h
+++ b/lib/prefix.h
@@ -244,6 +244,8 @@ union prefixconstptr
/* Count prefix size from mask length */
#define PSIZE(a) (((a) + 7) / (8))
+#define BSIZE(a) ((a) * (8))
+
/* Prefix's family member. */
#define PREFIX_FAMILY(p) ((p)->family)