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Date: Mon, 16 Dec 2013 00:27:09 -0500 (EST) From: David Miller <davem@...emloft.net> To: hkchu@...gle.com Cc: hannes@...essinduktion.org, netdev@...r.kernel.org Subject: Re: [PATCH net-next] net-ipv6: Fix alleged compiler warning in ipv6_exthdrs_len() From: "H.K. Jerry Chu" <hkchu@...gle.com> Date: Sun, 15 Dec 2013 18:48:07 -0800 > From: Jerry Chu <hkchu@...gle.com> > > It was reported that Commit 299603e8370a93dd5d8e8d800f0dff1ce2c53d36 > ("net-gro: Prepare GRO stack for the upcoming tunneling support") > triggered a compiler warning in ipv6_exthdrs_len(): > > net/ipv6/ip6_offload.c: In function ‘ipv6_gro_complete’: > net/ipv6/ip6_offload.c:178:24: warning: ‘optlen’ may be used uninitialized in this function [-Wmaybe-u > opth = (void *)opth + optlen; > ^ > net/ipv6/ip6_offload.c:164:22: note: ‘optlen’ was declared here > int len = 0, proto, optlen; > ^ > Note that there was no real bug here - optlen was never uninitialized > before use. (Was the version of gcc I used smarter to not complain?) > > Reported-by: Hannes Frederic Sowa <hannes@...essinduktion.org> > Signed-off-by: H.K. Jerry Chu <hkchu@...gle.com> Applied, thank you.
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