tree: https://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup.git btrfs-blkcg-updates head: 128ddd26f41a8fc4efdca041f134113adeee9a34 commit: a934428451c685ca89e6eed931bb0527efe462ef [2/8] blkcg, writeback: Implement wbc_blkcg_css() config: i386-randconfig-x009-201923 (attached as .config) compiler: gcc-7 (Debian 7.3.0-1) 7.3.0 reproduce: git checkout a934428451c685ca89e6eed931bb0527efe462ef # save the attached .config to linux build tree make ARCH=i386 If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp@xxxxxxxxx> Note: the cgroup/btrfs-blkcg-updates HEAD 128ddd26f41a8fc4efdca041f134113adeee9a34 builds fine. It only hurts bisectibility. All errors (new ones prefixed by >>): In file included from include/linux/memcontrol.h:22:0, from include/linux/swap.h:9, from include/linux/suspend.h:5, from arch/x86/kernel/asm-offsets.c:13: include/linux/writeback.h: In function 'wbc_blkcg_css': >> include/linux/writeback.h:103:9: error: 'blkcg_root_css' undeclared (first use in this function) return blkcg_root_css; ^~~~~~~~~~~~~~ include/linux/writeback.h:103:9: note: each undeclared identifier is reported only once for each function it appears in make[2]: *** [arch/x86/kernel/asm-offsets.s] Error 1 make[2]: Target '__build' not remade because of errors. make[1]: *** [prepare0] Error 2 make[1]: Target 'prepare' not remade because of errors. make: *** [sub-make] Error 2 vim +/blkcg_root_css +103 include/linux/writeback.h 95 96 static inline struct cgroup_subsys_state * 97 wbc_blkcg_css(struct writeback_control *wbc) 98 { 99 #ifdef CONFIG_CGROUP_WRITEBACK 100 if (wbc->wb) 101 return wbc->wb->blkcg_css; 102 #endif > 103 return blkcg_root_css; 104 } 105 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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