[ovs-dev] [PATCH 2/4] bitmap: New macro BITMAP_N_LONGS for use in constant expressions.
Ben Pfaff
blp at nicira.com
Sat Nov 9 23:55:05 UTC 2013
An upcoming commit will declare a bitmap on the stack, rather than heap
allocating it, which means that it is not possible to use a function call
in the declaration.
Signed-off-by: Ben Pfaff <blp at nicira.com>
---
lib/bitmap.h | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/lib/bitmap.h b/lib/bitmap.h
index 8980496..645f15f 100644
--- a/lib/bitmap.h
+++ b/lib/bitmap.h
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2008, 2009, 2010, 2011, 2012 Nicira, Inc.
+ * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013 Nicira, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -35,10 +35,12 @@ bitmap_bit__(size_t offset)
return 1UL << (offset % BITMAP_ULONG_BITS);
}
+#define BITMAP_N_LONGS(N_BITS) DIV_ROUND_UP(N_BITS, BITMAP_ULONG_BITS)
+
static inline size_t
bitmap_n_longs(size_t n_bits)
{
- return DIV_ROUND_UP(n_bits, BITMAP_ULONG_BITS);
+ return BITMAP_N_LONGS(n_bits);
}
static inline size_t
--
1.7.10.4
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