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Message-ID: <CANP3RGf-G1+OnBYrNpc1c_bzL1b-X4gzc=XtXs+5qArztxm1ug@mail.gmail.com> Date: Wed, 6 Dec 2023 03:00:00 -0800 From: Maciej Żenczykowski <maze@...gle.com> To: kernel test robot <lkp@...el.com> Cc: oe-kbuild-all@...ts.linux.dev, Linux Network Development Mailing List <netdev@...r.kernel.org>, "David S . Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, Shirley Ma <mashirle@...ibm.com>, David Ahern <dsahern@...nel.org>, Lorenzo Colitti <lorenzo@...gle.com> Subject: Re: [PATCH net] net: ipv6: support reporting otherwise unknown prefix flags in RTM_NEWPREFIX On Tue, Dec 5, 2023 at 11:12 AM kernel test robot <lkp@...el.com> wrote: > > Hi Maciej, > > kernel test robot noticed the following build errors: > > [auto build test ERROR on net/main] > > url: https://github.com/intel-lab-lkp/linux/commits/Maciej-enczykowski/net-ipv6-support-reporting-otherwise-unknown-prefix-flags-in-RTM_NEWPREFIX/20231205-035333 > base: net/main > patch link: https://lore.kernel.org/r/20231204195252.2004515-1-maze%40google.com > patch subject: [PATCH net] net: ipv6: support reporting otherwise unknown prefix flags in RTM_NEWPREFIX > config: arm-rpc_defconfig (https://download.01.org/0day-ci/archive/20231206/202312060307.EaL1FRwu-lkp@intel.com/config) > compiler: arm-linux-gnueabi-gcc (GCC) 13.2.0 > reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231206/202312060307.EaL1FRwu-lkp@intel.com/reproduce) I followed these steps, and it built just fine... maze@...top:~/K$ git log -n2 --oneline 57cde6e635d5 (HEAD) net: ipv6: support reporting otherwise unknown prefix flags in RTM_NEWPREFIX 7037d95a047c (net/main) r8152: add vendor/device ID pair for ASUS USB-C2500 maze@...top:~/K$ file -sL build_dir/vmlinux build_dir/vmlinux: ELF 32-bit LSB executable, ARM, EABI5 version 1 (SYSV), statically linked, BuildID[sha1]=ae5a34fc35b264d707b3f16e920282b96c080508, not stripped > > If you fix the issue in a separate patch/commit (i.e. not just a new version of > the same patch/commit), kindly add following tags > | Reported-by: kernel test robot <lkp@...el.com> > | Closes: https://lore.kernel.org/oe-kbuild-all/202312060307.EaL1FRwu-lkp@intel.com/ > > All errors (new ones prefixed by >>): > > In file included from include/linux/container_of.h:5, > from include/linux/list.h:5, > from include/linux/module.h:12, > from fs/lockd/svc.c:16: > >> include/linux/build_bug.h:78:41: error: static assertion failed: "sizeof(struct prefix_info) == 32" > 78 | #define __static_assert(expr, msg, ...) _Static_assert(expr, msg) > | ^~~~~~~~~~~~~~ > include/linux/build_bug.h:77:34: note: in expansion of macro '__static_assert' > 77 | #define static_assert(expr, ...) __static_assert(expr, ##__VA_ARGS__, #expr) > | ^~~~~~~~~~~~~~~ > include/net/addrconf.h:58:1: note: in expansion of macro 'static_assert' > 58 | static_assert(sizeof(struct prefix_info) == 32); > | ^~~~~~~~~~~~~ > -- > In file included from lib/vsprintf.c:21: > >> include/linux/build_bug.h:78:41: error: static assertion failed: "sizeof(struct prefix_info) == 32" > 78 | #define __static_assert(expr, msg, ...) _Static_assert(expr, msg) > | ^~~~~~~~~~~~~~ > include/linux/build_bug.h:77:34: note: in expansion of macro '__static_assert' > 77 | #define static_assert(expr, ...) __static_assert(expr, ##__VA_ARGS__, #expr) > | ^~~~~~~~~~~~~~~ > include/net/addrconf.h:58:1: note: in expansion of macro 'static_assert' > 58 | static_assert(sizeof(struct prefix_info) == 32); > | ^~~~~~~~~~~~~ > lib/vsprintf.c: In function 'va_format': > lib/vsprintf.c:1683:9: warning: function 'va_format' might be a candidate for 'gnu_printf' format attribute [-Wsuggest-attribute=format] > 1683 | buf += vsnprintf(buf, end > buf ? end - buf : 0, va_fmt->fmt, va); > | ^~~ > -- > In file included from include/linux/container_of.h:5, > from include/linux/list.h:5, > from include/linux/module.h:12, > from net/ipv4/route.c:63: > >> include/linux/build_bug.h:78:41: error: static assertion failed: "sizeof(struct prefix_info) == 32" > 78 | #define __static_assert(expr, msg, ...) _Static_assert(expr, msg) > | ^~~~~~~~~~~~~~ > include/linux/build_bug.h:77:34: note: in expansion of macro '__static_assert' > 77 | #define static_assert(expr, ...) __static_assert(expr, ##__VA_ARGS__, #expr) > | ^~~~~~~~~~~~~~~ > include/net/addrconf.h:58:1: note: in expansion of macro 'static_assert' > 58 | static_assert(sizeof(struct prefix_info) == 32); > | ^~~~~~~~~~~~~ > net/ipv4/route.c: In function 'ip_rt_send_redirect': > net/ipv4/route.c:880:13: warning: variable 'log_martians' set but not used [-Wunused-but-set-variable] > 880 | int log_martians; > | ^~~~~~~~~~~~ > -- > In file included from include/linux/container_of.h:5, > from include/linux/list.h:5, > from include/linux/timer.h:5, > from include/linux/workqueue.h:9, > from include/linux/bpf.h:10, > from net/ipv6/ip6_fib.c:18: > >> include/linux/build_bug.h:78:41: error: static assertion failed: "sizeof(struct prefix_info) == 32" > 78 | #define __static_assert(expr, msg, ...) _Static_assert(expr, msg) > | ^~~~~~~~~~~~~~ > include/linux/build_bug.h:77:34: note: in expansion of macro '__static_assert' > 77 | #define static_assert(expr, ...) __static_assert(expr, ##__VA_ARGS__, #expr) > | ^~~~~~~~~~~~~~~ > include/net/addrconf.h:58:1: note: in expansion of macro 'static_assert' > 58 | static_assert(sizeof(struct prefix_info) == 32); > | ^~~~~~~~~~~~~ > net/ipv6/ip6_fib.c: In function 'fib6_add': > net/ipv6/ip6_fib.c:1384:32: warning: variable 'pn' set but not used [-Wunused-but-set-variable] > 1384 | struct fib6_node *fn, *pn = NULL; > | ^~ > > > vim +78 include/linux/build_bug.h > > bc6245e5efd70c Ian Abbott 2017-07-10 60 > 6bab69c65013be Rasmus Villemoes 2019-03-07 61 /** > 6bab69c65013be Rasmus Villemoes 2019-03-07 62 * static_assert - check integer constant expression at build time > 6bab69c65013be Rasmus Villemoes 2019-03-07 63 * > 6bab69c65013be Rasmus Villemoes 2019-03-07 64 * static_assert() is a wrapper for the C11 _Static_assert, with a > 6bab69c65013be Rasmus Villemoes 2019-03-07 65 * little macro magic to make the message optional (defaulting to the > 6bab69c65013be Rasmus Villemoes 2019-03-07 66 * stringification of the tested expression). > 6bab69c65013be Rasmus Villemoes 2019-03-07 67 * > 6bab69c65013be Rasmus Villemoes 2019-03-07 68 * Contrary to BUILD_BUG_ON(), static_assert() can be used at global > 6bab69c65013be Rasmus Villemoes 2019-03-07 69 * scope, but requires the expression to be an integer constant > 6bab69c65013be Rasmus Villemoes 2019-03-07 70 * expression (i.e., it is not enough that __builtin_constant_p() is > 6bab69c65013be Rasmus Villemoes 2019-03-07 71 * true for expr). > 6bab69c65013be Rasmus Villemoes 2019-03-07 72 * > 6bab69c65013be Rasmus Villemoes 2019-03-07 73 * Also note that BUILD_BUG_ON() fails the build if the condition is > 6bab69c65013be Rasmus Villemoes 2019-03-07 74 * true, while static_assert() fails the build if the expression is > 6bab69c65013be Rasmus Villemoes 2019-03-07 75 * false. > 6bab69c65013be Rasmus Villemoes 2019-03-07 76 */ > 6bab69c65013be Rasmus Villemoes 2019-03-07 77 #define static_assert(expr, ...) __static_assert(expr, ##__VA_ARGS__, #expr) > 6bab69c65013be Rasmus Villemoes 2019-03-07 @78 #define __static_assert(expr, msg, ...) _Static_assert(expr, msg) > 6bab69c65013be Rasmus Villemoes 2019-03-07 79 > 07a368b3f55a79 Maxim Levitsky 2022-10-25 80 > > -- > 0-DAY CI Kernel Test Service > https://github.com/intel/lkp-tests/wikiMaciej Żenczykowski, Kernel Networking Developer @ Google
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