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-rw-r--r--includes/Cmm.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/includes/Cmm.h b/includes/Cmm.h
index 69b5acc5fc..ff91146745 100644
--- a/includes/Cmm.h
+++ b/includes/Cmm.h
@@ -463,6 +463,9 @@
#define StgFunInfoExtra_bitmap(i) StgFunInfoExtraFwd_bitmap(i)
#endif
+#define mutArrPtrsCardWords(n) \
+ ROUNDUP_BYTES_TO_WDS(((n) + (1 << MUT_ARR_PTRS_CARD_BITS) - 1) >> MUT_ARR_PTRS_CARD_BITS)
+
/* -----------------------------------------------------------------------------
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