From 0aec51c86986f61de26dd04913667af544a8b8eb Mon Sep 17 00:00:00 2001 From: Gerrit Renker Date: Tue, 20 Mar 2007 12:45:59 -0300 Subject: [PATCH] [DCCP]: Make dccp_delta_seqno return signed numbers Problem: --- net/dccp/dccp.h | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/net/dccp/dccp.h b/net/dccp/dccp.h index a2c20a265b25..afb313ff216e 100644 --- a/net/dccp/dccp.h +++ b/net/dccp/dccp.h @@ -113,9 +113,12 @@ static inline void dccp_inc_seqno(u64 *seqno) *seqno = ADD48(*seqno, 1); } -static inline u64 dccp_delta_seqno(u64 seqno1, u64 seqno2) +/* signed mod-2^48 distance: pos. if seqno1 < seqno2, neg. if seqno1 > seqno2 */ +static inline s64 dccp_delta_seqno(const u64 seqno1, const u64 seqno2) { - return ((seqno2 << 16) - (seqno1 << 16)) >> 16; + u64 delta = SUB48(seqno2, seqno1); + + return TO_SIGNED48(delta); } /* is seq1 < seq2 ? */