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Date: Wed, 3 Oct 2012 09:20:02 +0100 From: "David Laight" <David.Laight@...LAB.COM> To: "Stephen Hemminger" <shemminger@...tta.com>, "Julian Anastasov" <ja@....bg> Cc: "Eric Dumazet" <eric.dumazet@...il.com>, <netdev@...r.kernel.org> Subject: RE: [PATCH v2] iproute2: add support for tcp_metrics > > fprintf(fp, "%lluus", > > ((__u64) val * 1000) >> 2); ... > Remember u64 is not always same as unsigned long long. > One safe way of handling this is: ... > fprintf(fp, "%"PRIu64"us", > ((__u64) val * 1000) >> 3); Or convert the constant. fprintf(fp, "%lluus", (val * 1000ull) >> 2); which may well generate better code on 32bit systems. David -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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