Hi, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on tip/perf/core] [also build test WARNING on tip/sched/core powerpc/next v5.14-rc1 next-20210714] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/kan-liang-linux-intel-com/perf-Save-PMU-specific-data-in-task_struct/20210714-034829 base: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git c76826a65f50038f050424365dbf3f97203f8710 config: riscv-randconfig-s031-20210714 (attached as .config) compiler: riscv32-linux-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.3-341-g8af24329-dirty # https://github.com/0day-ci/linux/commit/5600461badd8a97324b24dde400e078bc7ee1cdd git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review kan-liang-linux-intel-com/perf-Save-PMU-specific-data-in-task_struct/20210714-034829 git checkout 5600461badd8a97324b24dde400e078bc7ee1cdd # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=riscv SHELL=/bin/bash kernel/events/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot sparse warnings: (new ones prefixed by >>) kernel/events/core.c:1464:15: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/events/core.c:1464:15: sparse: struct perf_event_context [noderef] __rcu * kernel/events/core.c:1464:15: sparse: struct perf_event_context * kernel/events/core.c:1477:28: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/events/core.c:1477:28: sparse: struct perf_event_context [noderef] __rcu * kernel/events/core.c:1477:28: sparse: struct perf_event_context * kernel/events/core.c:3427:18: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/events/core.c:3427:18: sparse: struct perf_event_context [noderef] __rcu * kernel/events/core.c:3427:18: sparse: struct perf_event_context * kernel/events/core.c:3428:23: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/events/core.c:3428:23: sparse: struct perf_event_context [noderef] __rcu * kernel/events/core.c:3428:23: sparse: struct perf_event_context * kernel/events/core.c:3476:25: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/events/core.c:3476:25: sparse: struct perf_event_context [noderef] __rcu * kernel/events/core.c:3476:25: sparse: struct perf_event_context * kernel/events/core.c:3477:25: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/events/core.c:3477:25: sparse: struct perf_event_context [noderef] __rcu * kernel/events/core.c:3477:25: sparse: struct perf_event_context * kernel/events/core.c:4677:25: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/events/core.c:4677:25: sparse: struct perf_event_context [noderef] __rcu * kernel/events/core.c:4677:25: sparse: struct perf_event_context * kernel/events/core.c:6159:9: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/events/core.c:6159:9: sparse: struct perf_buffer [noderef] __rcu * kernel/events/core.c:6159:9: sparse: struct perf_buffer * >> kernel/events/core.c:4833:21: sparse: sparse: cast removes address space '__rcu' of expression kernel/events/core.c:4943:13: sparse: sparse: cast removes address space '__rcu' of expression kernel/events/core.c:5635:24: sparse: sparse: incorrect type in assignment (different base types) @@ expected restricted __poll_t [usertype] events @@ got int @@ kernel/events/core.c:5865:22: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/events/core.c:5865:22: sparse: struct perf_buffer [noderef] __rcu * kernel/events/core.c:5865:22: sparse: struct perf_buffer * kernel/events/core.c:6001:14: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/events/core.c:6001:14: sparse: struct perf_buffer [noderef] __rcu * kernel/events/core.c:6001:14: sparse: struct perf_buffer * kernel/events/core.c:6034:14: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/events/core.c:6034:14: sparse: struct perf_buffer [noderef] __rcu * kernel/events/core.c:6034:14: sparse: struct perf_buffer * kernel/events/core.c:6091:14: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/events/core.c:6091:14: sparse: struct perf_buffer [noderef] __rcu * kernel/events/core.c:6091:14: sparse: struct perf_buffer * kernel/events/core.c:6177:14: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/events/core.c:6177:14: sparse: struct perf_buffer [noderef] __rcu * kernel/events/core.c:6177:14: sparse: struct perf_buffer * kernel/events/core.c:6190:14: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/events/core.c:6190:14: sparse: struct perf_buffer [noderef] __rcu * kernel/events/core.c:6190:14: sparse: struct perf_buffer * kernel/events/core.c:7825:23: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/events/core.c:7825:23: sparse: struct perf_event_context [noderef] __rcu * kernel/events/core.c:7825:23: sparse: struct perf_event_context * kernel/events/core.c:7877:23: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/events/core.c:7877:23: sparse: struct perf_event_context [noderef] __rcu * kernel/events/core.c:7877:23: sparse: struct perf_event_context * kernel/events/core.c:7916:13: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/events/core.c:7916:13: sparse: struct perf_buffer [noderef] __rcu * kernel/events/core.c:7916:13: sparse: struct perf_buffer * kernel/events/core.c:8021:61: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected struct task_struct *p @@ got struct task_struct [noderef] __rcu *real_parent @@ kernel/events/core.c:8021:61: sparse: expected struct task_struct *p kernel/events/core.c:8021:61: sparse: got struct task_struct [noderef] __rcu *real_parent kernel/events/core.c:8023:61: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected struct task_struct *p @@ got struct task_struct [noderef] __rcu *real_parent @@ kernel/events/core.c:8023:61: sparse: expected struct task_struct *p kernel/events/core.c:8023:61: sparse: got struct task_struct [noderef] __rcu *real_parent kernel/events/core.c:8780:23: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/events/core.c:8780:23: sparse: struct perf_event_context [noderef] __rcu * kernel/events/core.c:8780:23: sparse: struct perf_event_context * kernel/events/core.c:9745:9: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/events/core.c:9745:9: sparse: struct swevent_hlist [noderef] __rcu * kernel/events/core.c:9745:9: sparse: struct swevent_hlist * kernel/events/core.c:9784:17: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/events/core.c:9784:17: sparse: struct swevent_hlist [noderef] __rcu * kernel/events/core.c:9784:17: sparse: struct swevent_hlist * kernel/events/core.c:9965:23: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/events/core.c:9965:23: sparse: struct perf_event_context [noderef] __rcu * kernel/events/core.c:9965:23: sparse: struct perf_event_context * kernel/events/core.c:11150:1: sparse: sparse: symbol 'dev_attr_nr_addr_filters' was not declared. Should it be static? kernel/events/core.c:12928:9: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/events/core.c:12928:9: sparse: struct perf_event_context [noderef] __rcu * kernel/events/core.c:12928:9: sparse: struct perf_event_context * kernel/events/core.c:13045:17: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/events/core.c:13045:17: sparse: struct perf_event_context [noderef] __rcu * kernel/events/core.c:13045:17: sparse: struct perf_event_context * kernel/events/core.c:13476:17: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/events/core.c:13476:17: sparse: struct swevent_hlist [noderef] __rcu * kernel/events/core.c:13476:17: sparse: struct swevent_hlist * kernel/events/core.c:168:9: sparse: sparse: context imbalance in 'perf_ctx_lock' - wrong count at exit kernel/events/core.c:176:17: sparse: sparse: context imbalance in 'perf_ctx_unlock' - unexpected unlock kernel/events/core.c: note: in included file (through include/linux/rculist.h, include/linux/dcache.h, include/linux/fs.h): include/linux/rcupdate.h:707:9: sparse: sparse: context imbalance in 'perf_lock_task_context' - different lock contexts for basic block kernel/events/core.c:1511:17: sparse: sparse: context imbalance in 'perf_pin_task_context' - unexpected unlock kernel/events/core.c:2824:9: sparse: sparse: context imbalance in '__perf_install_in_context' - wrong count at exit kernel/events/core.c:4649:17: sparse: sparse: context imbalance in 'find_get_context' - unexpected unlock kernel/events/core.c: note: in included file: kernel/events/internal.h:197:46: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void const [noderef] __user *from @@ got void const *src @@ kernel/events/core.c:9594:17: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/events/core.c:9594:17: sparse: struct swevent_hlist [noderef] __rcu * kernel/events/core.c:9594:17: sparse: struct swevent_hlist * kernel/events/core.c:9614:17: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/events/core.c:9614:17: sparse: struct swevent_hlist [noderef] __rcu * kernel/events/core.c:9614:17: sparse: struct swevent_hlist * kernel/events/core.c:9734:16: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/events/core.c:9734:16: sparse: struct swevent_hlist [noderef] __rcu * kernel/events/core.c:9734:16: sparse: struct swevent_hlist * kernel/events/core.c:9734:16: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/events/core.c:9734:16: sparse: struct swevent_hlist [noderef] __rcu * kernel/events/core.c:9734:16: sparse: struct swevent_hlist * kernel/events/core.c:9734:16: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/events/core.c:9734:16: sparse: struct swevent_hlist [noderef] __rcu * kernel/events/core.c:9734:16: sparse: struct swevent_hlist * vim +/__rcu +4833 kernel/events/core.c 4821 4822 static int 4823 attach_task_ctx_data(struct task_struct *task, struct kmem_cache *ctx_cache, 4824 bool global) 4825 { 4826 struct perf_ctx_data *cd, *old = NULL; 4827 4828 cd = alloc_perf_ctx_data(ctx_cache, global); 4829 if (!cd) 4830 return -ENOMEM; 4831 4832 for (;;) { > 4833 if (try_cmpxchg(&task->perf_ctx_data, 4834 (struct perf_ctx_data __rcu **)&old, 4835 (struct perf_ctx_data __rcu *)cd)) { 4836 if (old) 4837 perf_free_ctx_data_rcu(old); 4838 return 0; 4839 } 4840 4841 if (!old) { 4842 /* 4843 * After seeing a dead @old, we raced with 4844 * removal and lost, try again to install @cd. 4845 */ 4846 continue; 4847 } 4848 4849 if (refcount_inc_not_zero(&old->refcount)) { 4850 free_perf_ctx_data(cd); /* unused */ 4851 return 0; 4852 } 4853 4854 /* 4855 * @old is a dead object, refcount==0 is stable, try and 4856 * replace it with @cd. 4857 */ 4858 } 4859 return 0; 4860 } 4861 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org