From: Kernel Test Robot <lkp@xxxxxxxxx> Date: Fri, 17 Feb 2023 21:45:40 +0800 > tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master > head: c068f40300a0eaa34f7105d137a5560b86951aa9 > commit: 6c20822fada1b8adb77fa450d03a0d449686a4a9 [12987/13499] bpf, test_run: fix &xdp_frame misplacement for LIVE_FRAMES > config: ia64-randconfig-r025-20230213 (https://download.01.org/0day-ci/archive/20230217/202302172104.q3ddwzqu-lkp@xxxxxxxxx/config) > compiler: ia64-linux-gcc (GCC) 12.1.0 ia64 has 128-byte cacheline on some configs. While I can easily test it in the kernel, what do I do in the userspace test >_< Or just exclude non-{64,256} CLs from the assertion? > reproduce (this is a W=1 build): > wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross > chmod +x ~/bin/make.cross > # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=6c20822fada1b8adb77fa450d03a0d449686a4a9 > git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git > git fetch --no-tags linux-next master > git checkout 6c20822fada1b8adb77fa450d03a0d449686a4a9 > # save the config file > mkdir build_dir && cp config build_dir/.config > COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=ia64 olddefconfig > COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=ia64 SHELL=/bin/bash net/ > > If you fix the issue, kindly add following tag where applicable > | Reported-by: kernel test robot <lkp@xxxxxxxxx> > | Link: https://lore.kernel.org/oe-kbuild-all/202302172104.q3ddwzqu-lkp@xxxxxxxxx/ > > 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/timer.h:5, > from include/linux/workqueue.h:9, > from include/linux/bpf.h:10, > from net/bpf/test_run.c:4: >>> include/linux/build_bug.h:78:41: error: static assertion failed: "SKB_WITH_OVERHEAD(TEST_XDP_FRAME_SIZE - XDP_PACKET_HEADROOM) == TEST_MAX_PKT_SIZE" > 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) > | ^~~~~~~~~~~~~~~ > net/bpf/test_run.c:132:1: note: in expansion of macro 'static_assert' > 132 | static_assert(SKB_WITH_OVERHEAD(TEST_XDP_FRAME_SIZE - XDP_PACKET_HEADROOM) == > | ^~~~~~~~~~~~~ > > > 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 > > :::::: The code at line 78 was first introduced by commit > :::::: 6bab69c65013bed5fce9f101a64a84d0385b3946 build_bug.h: add wrapper for _Static_assert > > :::::: TO: Rasmus Villemoes <linux@xxxxxxxxxxxxxxxxxx> > :::::: CC: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> > Thanks, Olek
