tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 2030579113a1b1b5bfd7ff24c0852847836d8fd1 commit: 9c66dc94b62aef23300f05f63404afb8990920b4 [13777/13906] bpf: Introduce css_task open-coded iterator kfuncs config: hexagon-randconfig-r003-20230725 (https://download.01.org/0day-ci/archive/20231021/202310211011.pTzXR2o9-lkp@xxxxxxxxx/config) compiler: clang version 16.0.4 (https://github.com/llvm/llvm-project.git ae42196bc493ffe877a7e3dff8be32035dea4d07) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231021/202310211011.pTzXR2o9-lkp@xxxxxxxxx/reproduce) 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@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202310211011.pTzXR2o9-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): In file included from kernel/bpf/task_iter.c:9: In file included from include/linux/filter.h:9: In file included from include/linux/bpf.h:31: In file included from include/linux/memcontrol.h:13: In file included from include/linux/cgroup.h:26: In file included from include/linux/kernel_stat.h:9: In file included from include/linux/interrupt.h:11: In file included from include/linux/hardirq.h:11: In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1: In file included from include/asm-generic/hardirq.h:17: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/hexagon/include/asm/io.h:337: include/asm-generic/io.h:547:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __raw_readb(PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:560:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr)); ~~~~~~~~~~ ^ include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu' #define __le16_to_cpu(x) ((__force __u16)(__le16)(x)) ^ In file included from kernel/bpf/task_iter.c:9: In file included from include/linux/filter.h:9: In file included from include/linux/bpf.h:31: In file included from include/linux/memcontrol.h:13: In file included from include/linux/cgroup.h:26: In file included from include/linux/kernel_stat.h:9: In file included from include/linux/interrupt.h:11: In file included from include/linux/hardirq.h:11: In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1: In file included from include/asm-generic/hardirq.h:17: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/hexagon/include/asm/io.h:337: include/asm-generic/io.h:573:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr)); ~~~~~~~~~~ ^ include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu' #define __le32_to_cpu(x) ((__force __u32)(__le32)(x)) ^ In file included from kernel/bpf/task_iter.c:9: In file included from include/linux/filter.h:9: In file included from include/linux/bpf.h:31: In file included from include/linux/memcontrol.h:13: In file included from include/linux/cgroup.h:26: In file included from include/linux/kernel_stat.h:9: In file included from include/linux/interrupt.h:11: In file included from include/linux/hardirq.h:11: In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1: In file included from include/asm-generic/hardirq.h:17: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/hexagon/include/asm/io.h:337: include/asm-generic/io.h:584:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writeb(value, PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:594:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:604:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr); ~~~~~~~~~~ ^ >> kernel/bpf/task_iter.c:919:7: error: use of undeclared identifier 'CSS_TASK_ITER_PROCS' case CSS_TASK_ITER_PROCS | CSS_TASK_ITER_THREADED: ^ >> kernel/bpf/task_iter.c:919:29: error: use of undeclared identifier 'CSS_TASK_ITER_THREADED' case CSS_TASK_ITER_PROCS | CSS_TASK_ITER_THREADED: ^ kernel/bpf/task_iter.c:920:7: error: use of undeclared identifier 'CSS_TASK_ITER_PROCS' case CSS_TASK_ITER_PROCS: ^ >> kernel/bpf/task_iter.c:927:46: error: invalid application of 'sizeof' to an incomplete type 'struct css_task_iter' kit->css_it = bpf_mem_alloc(&bpf_global_ma, sizeof(struct css_task_iter)); ^ ~~~~~~~~~~~~~~~~~~~~~~ kernel/bpf/task_iter.c:902:9: note: forward declaration of 'struct css_task_iter' struct css_task_iter *css_it; ^ >> kernel/bpf/task_iter.c:930:2: error: call to undeclared function 'css_task_iter_start'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] css_task_iter_start(css, flags, kit->css_it); ^ kernel/bpf/task_iter.c:930:2: note: did you mean '__sg_page_iter_start'? include/linux/scatterlist.h:573:6: note: '__sg_page_iter_start' declared here void __sg_page_iter_start(struct sg_page_iter *piter, ^ >> kernel/bpf/task_iter.c:940:9: error: call to undeclared function 'css_task_iter_next'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] return css_task_iter_next(kit->css_it); ^ >> kernel/bpf/task_iter.c:940:9: error: incompatible integer to pointer conversion returning 'int' from a function with result type 'struct task_struct *' [-Wint-conversion] return css_task_iter_next(kit->css_it); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ >> kernel/bpf/task_iter.c:949:2: error: call to undeclared function 'css_task_iter_end'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] css_task_iter_end(kit->css_it); ^ 6 warnings and 8 errors generated. vim +/CSS_TASK_ITER_PROCS +919 kernel/bpf/task_iter.c 904 905 __diag_push(); 906 __diag_ignore_all("-Wmissing-prototypes", 907 "Global functions as their definitions will be in vmlinux BTF"); 908 909 __bpf_kfunc int bpf_iter_css_task_new(struct bpf_iter_css_task *it, 910 struct cgroup_subsys_state *css, unsigned int flags) 911 { 912 struct bpf_iter_css_task_kern *kit = (void *)it; 913 914 BUILD_BUG_ON(sizeof(struct bpf_iter_css_task_kern) != sizeof(struct bpf_iter_css_task)); 915 BUILD_BUG_ON(__alignof__(struct bpf_iter_css_task_kern) != 916 __alignof__(struct bpf_iter_css_task)); 917 kit->css_it = NULL; 918 switch (flags) { > 919 case CSS_TASK_ITER_PROCS | CSS_TASK_ITER_THREADED: > 920 case CSS_TASK_ITER_PROCS: 921 case 0: 922 break; 923 default: 924 return -EINVAL; 925 } 926 > 927 kit->css_it = bpf_mem_alloc(&bpf_global_ma, sizeof(struct css_task_iter)); 928 if (!kit->css_it) 929 return -ENOMEM; > 930 css_task_iter_start(css, flags, kit->css_it); 931 return 0; 932 } 933 934 __bpf_kfunc struct task_struct *bpf_iter_css_task_next(struct bpf_iter_css_task *it) 935 { 936 struct bpf_iter_css_task_kern *kit = (void *)it; 937 938 if (!kit->css_it) 939 return NULL; > 940 return css_task_iter_next(kit->css_it); 941 } 942 943 __bpf_kfunc void bpf_iter_css_task_destroy(struct bpf_iter_css_task *it) 944 { 945 struct bpf_iter_css_task_kern *kit = (void *)it; 946 947 if (!kit->css_it) 948 return; > 949 css_task_iter_end(kit->css_it); 950 bpf_mem_free(&bpf_global_ma, kit->css_it); 951 } 952 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
