tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 48e8992e33abf054bcc0bb2e77b2d43bb899212e commit: 0bd6bc435f7db3e22acb410b721e97a97463c51c [6674/7300] drivers: perf: Fix build error by adding const to ctl_table argument of handler config: riscv-defconfig (https://download.01.org/0day-ci/archive/20231213/202312131509.n6cZrTLi-lkp@xxxxxxxxx/config) compiler: riscv64-linux-gcc (GCC) 13.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231213/202312131509.n6cZrTLi-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/202312131509.n6cZrTLi-lkp@xxxxxxxxx/ Note: the linux-next/master HEAD 48e8992e33abf054bcc0bb2e77b2d43bb899212e builds fine. It may have been fixed somewhere. All errors (new ones prefixed by >>): drivers/perf/riscv_pmu_sbi.c: In function 'riscv_pmu_proc_user_access_handler': drivers/perf/riscv_pmu_sbi.c:994:40: warning: passing argument 1 of 'proc_dointvec_minmax' discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers] 994 | int ret = proc_dointvec_minmax(table, write, buffer, lenp, ppos); | ^~~~~ In file included from include/linux/key.h:17, from include/linux/cred.h:13, from include/linux/sched/signal.h:10, from include/linux/rcuwait.h:6, from include/linux/percpu-rwsem.h:7, from include/linux/fs.h:33, from include/linux/perf_event.h:49, from include/linux/perf/riscv_pmu.h:12, from drivers/perf/riscv_pmu_sbi.c:14: include/linux/sysctl.h:72:26: note: expected 'struct ctl_table *' but argument is of type 'const struct ctl_table *' 72 | int proc_dointvec_minmax(struct ctl_table *, int, void *, size_t *, loff_t *); | ^~~~~~~~~~~~~~~~~~ drivers/perf/riscv_pmu_sbi.c: At top level: >> drivers/perf/riscv_pmu_sbi.c:1015:35: error: initialization of 'int (*)(struct ctl_table *, int, void *, size_t *, loff_t *)' {aka 'int (*)(struct ctl_table *, int, void *, long unsigned int *, long long int *)'} from incompatible pointer type 'int (*)(const struct ctl_table *, int, void *, size_t *, loff_t *)' {aka 'int (*)(const struct ctl_table *, int, void *, long unsigned int *, long long int *)'} [-Werror=incompatible-pointer-types] 1015 | .proc_handler = riscv_pmu_proc_user_access_handler, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/perf/riscv_pmu_sbi.c:1015:35: note: (near initialization for 'sbi_pmu_sysctl_table[0].proc_handler') cc1: some warnings being treated as errors vim +1015 drivers/perf/riscv_pmu_sbi.c cc4c07c89aada1 Alexandre Ghiti 2023-08-02 1008 cc4c07c89aada1 Alexandre Ghiti 2023-08-02 1009 static struct ctl_table sbi_pmu_sysctl_table[] = { cc4c07c89aada1 Alexandre Ghiti 2023-08-02 1010 { cc4c07c89aada1 Alexandre Ghiti 2023-08-02 1011 .procname = "perf_user_access", cc4c07c89aada1 Alexandre Ghiti 2023-08-02 1012 .data = &sysctl_perf_user_access, cc4c07c89aada1 Alexandre Ghiti 2023-08-02 1013 .maxlen = sizeof(unsigned int), cc4c07c89aada1 Alexandre Ghiti 2023-08-02 1014 .mode = 0644, cc4c07c89aada1 Alexandre Ghiti 2023-08-02 @1015 .proc_handler = riscv_pmu_proc_user_access_handler, cc4c07c89aada1 Alexandre Ghiti 2023-08-02 1016 .extra1 = SYSCTL_ZERO, cc4c07c89aada1 Alexandre Ghiti 2023-08-02 1017 .extra2 = SYSCTL_TWO, cc4c07c89aada1 Alexandre Ghiti 2023-08-02 1018 }, cc4c07c89aada1 Alexandre Ghiti 2023-08-02 1019 { } cc4c07c89aada1 Alexandre Ghiti 2023-08-02 1020 }; cc4c07c89aada1 Alexandre Ghiti 2023-08-02 1021 :::::: The code at line 1015 was first introduced by commit :::::: cc4c07c89aada16229084eeb93895c95b7eabaa3 drivers: perf: Implement perf event mmap support in the SBI backend :::::: TO: Alexandre Ghiti <alexghiti@xxxxxxxxxxxx> :::::: CC: Palmer Dabbelt <palmer@xxxxxxxxxxxx> -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
