sctp: use bitmap_weight

Use bitmap_weight to count the total number of bits set in bitmap.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Vlad Yasevich <vyasevich@gmail.com>
Cc: Sridhar Samudrala <sri@us.ibm.com>
Cc: linux-sctp@vger.kernel.org
Cc: netdev@vger.kernel.org
Acked-by: Vlad Yasevich <vyasevich@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 6 deletions

diff --git a/net/sctp/tsnmap.c b/net/sctp/tsnmap.c
index b5fb7c409023..5f25e0c92c31 100644
--- a/net/sctp/tsnmap.c
+++ b/net/sctp/tsnmap.c
@@ -272,7 +272,7 @@ __u16 sctp_tsnmap_pending(struct sctp_tsnmap *map)
         __u32 max_tsn = map->max_tsn_seen;
         __u32 base_tsn = map->base_tsn;
         __u16 pending_data;
-        u32 gap, i;
+        u32 gap;
 
         pending_data = max_tsn - cum_tsn;
         gap = max_tsn - base_tsn;
@@ -280,11 +280,7 @@ __u16 sctp_tsnmap_pending(struct sctp_tsnmap *map)
         if (gap == 0 || gap >= map->len)
                 goto out;
 
-        for (i = 0; i < gap+1; i++) {
-                if (test_bit(i, map->tsn_map))
-                        pending_data--;
-        }
-
+        pending_data -= bitmap_weight(map->tsn_map, gap + 1);
 out:
         return pending_data;
 }