Use BITS_TO_LONGS() macro to avoid calculation of reminder
(bits % BITS_PER_LONG) On ARM64 it saves 5 instruction for function -
16 before and 11 after.

Signed-off-by: Yury Norov <yno...@caviumnetworks.com>
---
 lib/bitmap.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/lib/bitmap.c b/lib/bitmap.c
index c82c61b66e16..7adc10074cff 100644
--- a/lib/bitmap.c
+++ b/lib/bitmap.c
@@ -62,12 +62,9 @@ EXPORT_SYMBOL(__bitmap_equal);
 
 void __bitmap_complement(unsigned long *dst, const unsigned long *src, 
unsigned int bits)
 {
-       unsigned int k, lim = bits/BITS_PER_LONG;
+       unsigned int k, lim = BITS_TO_LONGS(bits);
        for (k = 0; k < lim; ++k)
                dst[k] = ~src[k];
-
-       if (bits % BITS_PER_LONG)
-               dst[k] = ~src[k];
 }
 EXPORT_SYMBOL(__bitmap_complement);
 
-- 
2.14.1

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