tree: https://github.com/Xilinx/linux-xlnx xlnx_rebase_v5.15 head: 966124532656bc95d781abf57531e4cd4f962237 commit: 23b920bb9d53a7fcb8e9938f70228ae4d137f244 [480/923] microblaze: Enable experimental SMP functionality config: microblaze-randconfig-r023-20220210 (https://download.01.org/0day-ci/archive/20220210/202202102317.n7MAKI54-lk...) compiler: microblaze-linux-gcc (GCC) 11.2.0 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://github.com/Xilinx/linux-xlnx/commit/23b920bb9d53a7fcb8e9938f70228... git remote add xilinx-xlnx https://github.com/Xilinx/linux-xlnx git fetch --no-tags xilinx-xlnx xlnx_rebase_v5.15 git checkout 23b920bb9d53a7fcb8e9938f70228ae4d137f244 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=microblaze SHELL=/bin/bash arch/microblaze/kernel/ mm/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All error/warnings (new ones prefixed by >>): In file included from include/linux/smp.h:13, from include/linux/lockdep.h:14, from include/linux/spinlock.h:63, from include/linux/mmzone.h:8, from include/linux/gfp.h:6, from include/linux/mm.h:10, from arch/microblaze/kernel/ptrace.c:28: 95 | #define cpu_possible_mask ((const struct cpumask *)&__cpu_possible_mask) | ^~~~~~~ include/linux/cpumask.h:889:48: note: in expansion of macro 'cpu_possible_mask' 889 | #define num_possible_cpus() cpumask_weight(cpu_possible_mask) | ^~~~~~~~~~~~~~~~~ arch/microblaze/include/asm/fixmap.h:50:55: note: in expansion of macro 'num_possible_cpus' 50 | FIX_KMAP_END = FIX_KMAP_BEGIN + (KM_MAX_IDX * num_possible_cpus()) - 1, | ^~~~~~~~~~~~~~~~~ -- 156 | void crash___smp_cross_call(void (*crash_ipi_callback)(struct pt_regs *)) | ^~~~~~~~~~~~~~~~~~~~~~ arch/microblaze/kernel/smp.c: In function 'smp_prepare_cpus': 197 | void __init smp_prepare_cpus(unsigned int max_cpus) | ~~~~~~~~~~~~~^~~~~~~~ -- In file included from include/linux/smp.h:13, from include/linux/lockdep.h:14, from include/linux/spinlock.h:63, from include/linux/mmzone.h:8, from include/linux/gfp.h:6, from include/linux/mm.h:10, from mm/vmscan.c:15: 95 | #define cpu_possible_mask ((const struct cpumask *)&__cpu_possible_mask) | ^~~~~~~ include/linux/cpumask.h:889:48: note: in expansion of macro 'cpu_possible_mask' 889 | #define num_possible_cpus() cpumask_weight(cpu_possible_mask) | ^~~~~~~~~~~~~~~~~ arch/microblaze/include/asm/fixmap.h:50:55: note: in expansion of macro 'num_possible_cpus' 50 | FIX_KMAP_END = FIX_KMAP_BEGIN + (KM_MAX_IDX * num_possible_cpus()) - 1, | ^~~~~~~~~~~~~~~~~ mm/vmscan.c: In function 'demote_page_list': mm/vmscan.c:1340:13: warning: variable 'err' set but not used [-Wunused-but-set-variable] 1340 | int err; | ^~~ -- In file included from mm/percpu.c:72: 95 | #define cpu_possible_mask ((const struct cpumask *)&__cpu_possible_mask) | ^~~~~~~ include/linux/cpumask.h:889:48: note: in expansion of macro 'cpu_possible_mask' 889 | #define num_possible_cpus() cpumask_weight(cpu_possible_mask) | ^~~~~~~~~~~~~~~~~ arch/microblaze/include/asm/fixmap.h:50:55: note: in expansion of macro 'num_possible_cpus' 50 | FIX_KMAP_END = FIX_KMAP_BEGIN + (KM_MAX_IDX * num_possible_cpus()) - 1, | ^~~~~~~~~~~~~~~~~ mm/percpu.c:3030:12: warning: no previous prototype for 'pcpu_embed_first_chunk' [-Wmissing-prototypes] 3030 | int __init pcpu_embed_first_chunk(size_t reserved_size, size_t dyn_size, | ^~~~~~~~~~~~~~~~~~~~~~ -- In file included from include/linux/smp.h:13, from include/linux/lockdep.h:14, from include/linux/rcupdate.h:29, from include/linux/rculist.h:11, from include/linux/pid.h:5, from include/linux/sched.h:14, from include/linux/ratelimit.h:6, from include/linux/dev_printk.h:16, from include/linux/device.h:15, from include/linux/node.h:18, from include/linux/cpu.h:17, from mm/compaction.c:11: 95 | #define cpu_possible_mask ((const struct cpumask *)&__cpu_possible_mask) | ^~~~~~~ include/linux/cpumask.h:889:48: note: in expansion of macro 'cpu_possible_mask' 889 | #define num_possible_cpus() cpumask_weight(cpu_possible_mask) | ^~~~~~~~~~~~~~~~~ arch/microblaze/include/asm/fixmap.h:50:55: note: in expansion of macro 'num_possible_cpus' 50 | FIX_KMAP_END = FIX_KMAP_BEGIN + (KM_MAX_IDX * num_possible_cpus()) - 1, | ^~~~~~~~~~~~~~~~~ mm/compaction.c:56:27: warning: 'HPAGE_FRAG_CHECK_INTERVAL_MSEC' defined but not used [-Wunused-const-variable=] 56 | static const unsigned int HPAGE_FRAG_CHECK_INTERVAL_MSEC = 500; | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -- In file included from include/linux/smp.h:13, from include/linux/lockdep.h:14, from include/linux/spinlock.h:63, from include/linux/mmzone.h:8, from include/linux/gfp.h:6, from include/linux/mm.h:10, from mm/page_alloc.c:19: 95 | #define cpu_possible_mask ((const struct cpumask *)&__cpu_possible_mask) | ^~~~~~~ include/linux/cpumask.h:889:48: note: in expansion of macro 'cpu_possible_mask' 889 | #define num_possible_cpus() cpumask_weight(cpu_possible_mask) | ^~~~~~~~~~~~~~~~~ arch/microblaze/include/asm/fixmap.h:50:55: note: in expansion of macro 'num_possible_cpus' 50 | FIX_KMAP_END = FIX_KMAP_BEGIN + (KM_MAX_IDX * num_possible_cpus()) - 1, | ^~~~~~~~~~~~~~~~~ mm/page_alloc.c:3812:15: warning: no previous prototype for 'should_fail_alloc_page' [-Wmissing-prototypes] 3812 | noinline bool should_fail_alloc_page(gfp_t gfp_mask, unsigned int order) | ^~~~~~~~~~~~~~~~~~~~~~ vim +/FIX_KMAP_END +95 include/linux/cpumask.h ^1da177e4c3f41 Linus Torvalds 2005-04-16 49 ^1da177e4c3f41 Linus Torvalds 2005-04-16 50 /* ^1da177e4c3f41 Linus Torvalds 2005-04-16 51 * The following particular system cpumasks and operations manage b3199c025d1646 Rusty Russell 2008-12-30 52 * possible, present, active and online cpus. ^1da177e4c3f41 Linus Torvalds 2005-04-16 53 * b3199c025d1646 Rusty Russell 2008-12-30 54 * cpu_possible_mask- has bit 'cpu' set iff cpu is populatable b3199c025d1646 Rusty Russell 2008-12-30 55 * cpu_present_mask - has bit 'cpu' set iff cpu is populated b3199c025d1646 Rusty Russell 2008-12-30 56 * cpu_online_mask - has bit 'cpu' set iff cpu available to scheduler b3199c025d1646 Rusty Russell 2008-12-30 57 * cpu_active_mask - has bit 'cpu' set iff cpu available to migration ^1da177e4c3f41 Linus Torvalds 2005-04-16 58 * b3199c025d1646 Rusty Russell 2008-12-30 59 * If !CONFIG_HOTPLUG_CPU, present == possible, and active == online. ^1da177e4c3f41 Linus Torvalds 2005-04-16 60 * b3199c025d1646 Rusty Russell 2008-12-30 61 * The cpu_possible_mask is fixed at boot time, as the set of CPU id's b3199c025d1646 Rusty Russell 2008-12-30 62 * that it is possible might ever be plugged in at anytime during the b3199c025d1646 Rusty Russell 2008-12-30 63 * life of that system boot. The cpu_present_mask is dynamic(*), b3199c025d1646 Rusty Russell 2008-12-30 64 * representing which CPUs are currently plugged in. And b3199c025d1646 Rusty Russell 2008-12-30 65 * cpu_online_mask is the dynamic subset of cpu_present_mask, b3199c025d1646 Rusty Russell 2008-12-30 66 * indicating those CPUs available for scheduling. b3199c025d1646 Rusty Russell 2008-12-30 67 * b3199c025d1646 Rusty Russell 2008-12-30 68 * If HOTPLUG is enabled, then cpu_possible_mask is forced to have ^1da177e4c3f41 Linus Torvalds 2005-04-16 69 * all NR_CPUS bits set, otherwise it is just the set of CPUs that ^1da177e4c3f41 Linus Torvalds 2005-04-16 70 * ACPI reports present at boot. ^1da177e4c3f41 Linus Torvalds 2005-04-16 71 * b3199c025d1646 Rusty Russell 2008-12-30 72 * If HOTPLUG is enabled, then cpu_present_mask varies dynamically, ^1da177e4c3f41 Linus Torvalds 2005-04-16 73 * depending on what ACPI reports as currently plugged in, otherwise b3199c025d1646 Rusty Russell 2008-12-30 74 * cpu_present_mask is just a copy of cpu_possible_mask. ^1da177e4c3f41 Linus Torvalds 2005-04-16 75 * b3199c025d1646 Rusty Russell 2008-12-30 76 * (*) Well, cpu_present_mask is dynamic in the hotplug case. If not b3199c025d1646 Rusty Russell 2008-12-30 77 * hotplug, it's a copy of cpu_possible_mask, hence fixed at boot. ^1da177e4c3f41 Linus Torvalds 2005-04-16 78 * ^1da177e4c3f41 Linus Torvalds 2005-04-16 79 * Subtleties: ^1da177e4c3f41 Linus Torvalds 2005-04-16 80 * 1) UP arch's (NR_CPUS == 1, CONFIG_SMP not defined) hardcode ^1da177e4c3f41 Linus Torvalds 2005-04-16 81 * assumption that their single CPU is online. The UP b3199c025d1646 Rusty Russell 2008-12-30 82 * cpu_{online,possible,present}_masks are placebos. Changing them ^1da177e4c3f41 Linus Torvalds 2005-04-16 83 * will have no useful affect on the following num_*_cpus() ^1da177e4c3f41 Linus Torvalds 2005-04-16 84 * and cpu_*() macros in the UP case. This ugliness is a UP ^1da177e4c3f41 Linus Torvalds 2005-04-16 85 * optimization - don't waste any instructions or memory references ^1da177e4c3f41 Linus Torvalds 2005-04-16 86 * asking if you're online or how many CPUs there are if there is ^1da177e4c3f41 Linus Torvalds 2005-04-16 87 * only one CPU. ^1da177e4c3f41 Linus Torvalds 2005-04-16 88 */ ^1da177e4c3f41 Linus Torvalds 2005-04-16 89 4b804c85dc37db Rasmus Villemoes 2016-01-20 90 extern struct cpumask __cpu_possible_mask; 4b804c85dc37db Rasmus Villemoes 2016-01-20 91 extern struct cpumask __cpu_online_mask; 4b804c85dc37db Rasmus Villemoes 2016-01-20 92 extern struct cpumask __cpu_present_mask; 4b804c85dc37db Rasmus Villemoes 2016-01-20 93 extern struct cpumask __cpu_active_mask; e40f74c535b8a0 Peter Zijlstra 2021-01-19 94 extern struct cpumask __cpu_dying_mask; 5aec01b834fd6f Rasmus Villemoes 2016-01-20 @95 #define cpu_possible_mask ((const struct cpumask *)&__cpu_possible_mask) 5aec01b834fd6f Rasmus Villemoes 2016-01-20 96 #define cpu_online_mask ((const struct cpumask *)&__cpu_online_mask) 5aec01b834fd6f Rasmus Villemoes 2016-01-20 97 #define cpu_present_mask ((const struct cpumask *)&__cpu_present_mask) 5aec01b834fd6f Rasmus Villemoes 2016-01-20 98 #define cpu_active_mask ((const struct cpumask *)&__cpu_active_mask) e40f74c535b8a0 Peter Zijlstra 2021-01-19 99 #define cpu_dying_mask ((const struct cpumask *)&__cpu_dying_mask) b3199c025d1646 Rusty Russell 2008-12-30 100 :::::: The code at line 95 was first introduced by commit :::::: 5aec01b834fd6f8ca49d1aeede665b950d0c148e kernel/cpu.c: eliminate cpu_*_mask :::::: TO: Rasmus Villemoes <linux(a)rasmusvillemoes.dk&gt; :::::: CC: Linus Torvalds <torvalds(a)linux-foundation.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org