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Date: Wed, 6 Dec 2023 00:05:03 +0800
From: kernel test robot <lkp@...el.com>
To: Thomas Weißschuh <linux@...ssschuh.net>,
	Kees Cook <keescook@...omium.org>,
	"Gustavo A. R. Silva" <gustavoars@...nel.org>,
	Luis Chamberlain <mcgrof@...nel.org>,
	Iurii Zaikin <yzaikin@...gle.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Joel Granados <j.granados@...sung.com>
Cc: oe-kbuild-all@...ts.linux.dev, linux-hardening@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	Thomas Weißschuh <linux@...ssschuh.net>
Subject: Re: [PATCH v2 12/18] sysctl: treewide: constify the ctl_table
 argument of handlers

Hi Thomas,

kernel test robot noticed the following build errors:

[auto build test ERROR on netfilter-nf/main]
[also build test ERROR on akpm-mm/mm-everything linus/master v6.7-rc4]
[cannot apply to nf-next/master next-20231205]
[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#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Thomas-Wei-schuh/sysctl-delete-unused-define-SYSCTL_PERM_EMPTY_DIR/20231204-165306
base:   git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf.git main
patch link:    https://lore.kernel.org/r/20231204-const-sysctl-v2-12-7a5060b11447%40weissschuh.net
patch subject: [PATCH v2 12/18] sysctl: treewide: constify the ctl_table argument of handlers
config: arm64-defconfig (https://download.01.org/0day-ci/archive/20231205/202312052324.nGsOnPtj-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231205/202312052324.nGsOnPtj-lkp@intel.com/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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202312052324.nGsOnPtj-lkp@intel.com/

All errors (new ones prefixed by >>):

         |                                                                 ^~~~~~
   drivers/perf/arm_pmuv3.c:144:51: note: in expansion of macro 'ARMV8_IMPDEF_PERFCTR_L1D_CACHE_REFILL_RD'
     144 |         [C(L1D)][C(OP_READ)][C(RESULT_MISS)]    = ARMV8_IMPDEF_PERFCTR_L1D_CACHE_REFILL_RD,
         |                                                   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/perf/arm_pmuv3.h:122:65: warning: initialized field overwritten [-Woverride-init]
     122 | #define ARMV8_IMPDEF_PERFCTR_L1D_CACHE_WR                       0x0041
         |                                                                 ^~~~~~
   drivers/perf/arm_pmuv3.c:145:51: note: in expansion of macro 'ARMV8_IMPDEF_PERFCTR_L1D_CACHE_WR'
     145 |         [C(L1D)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_L1D_CACHE_WR,
         |                                                   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/perf/arm_pmuv3.h:122:65: note: (near initialization for 'armv8_vulcan_perf_cache_map[0][1][0]')
     122 | #define ARMV8_IMPDEF_PERFCTR_L1D_CACHE_WR                       0x0041
         |                                                                 ^~~~~~
   drivers/perf/arm_pmuv3.c:145:51: note: in expansion of macro 'ARMV8_IMPDEF_PERFCTR_L1D_CACHE_WR'
     145 |         [C(L1D)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_L1D_CACHE_WR,
         |                                                   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/perf/arm_pmuv3.h:124:65: warning: initialized field overwritten [-Woverride-init]
     124 | #define ARMV8_IMPDEF_PERFCTR_L1D_CACHE_REFILL_WR                0x0043
         |                                                                 ^~~~~~
   drivers/perf/arm_pmuv3.c:146:51: note: in expansion of macro 'ARMV8_IMPDEF_PERFCTR_L1D_CACHE_REFILL_WR'
     146 |         [C(L1D)][C(OP_WRITE)][C(RESULT_MISS)]   = ARMV8_IMPDEF_PERFCTR_L1D_CACHE_REFILL_WR,
         |                                                   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/perf/arm_pmuv3.h:124:65: note: (near initialization for 'armv8_vulcan_perf_cache_map[0][1][1]')
     124 | #define ARMV8_IMPDEF_PERFCTR_L1D_CACHE_REFILL_WR                0x0043
         |                                                                 ^~~~~~
   drivers/perf/arm_pmuv3.c:146:51: note: in expansion of macro 'ARMV8_IMPDEF_PERFCTR_L1D_CACHE_REFILL_WR'
     146 |         [C(L1D)][C(OP_WRITE)][C(RESULT_MISS)]   = ARMV8_IMPDEF_PERFCTR_L1D_CACHE_REFILL_WR,
         |                                                   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/perf/arm_pmuv3.h:133:65: warning: initialized field overwritten [-Woverride-init]
     133 | #define ARMV8_IMPDEF_PERFCTR_L1D_TLB_RD                         0x004E
         |                                                                 ^~~~~~
   drivers/perf/arm_pmuv3.c:148:51: note: in expansion of macro 'ARMV8_IMPDEF_PERFCTR_L1D_TLB_RD'
     148 |         [C(DTLB)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_L1D_TLB_RD,
         |                                                   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/perf/arm_pmuv3.h:133:65: note: (near initialization for 'armv8_vulcan_perf_cache_map[3][0][0]')
     133 | #define ARMV8_IMPDEF_PERFCTR_L1D_TLB_RD                         0x004E
         |                                                                 ^~~~~~
   drivers/perf/arm_pmuv3.c:148:51: note: in expansion of macro 'ARMV8_IMPDEF_PERFCTR_L1D_TLB_RD'
     148 |         [C(DTLB)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_L1D_TLB_RD,
         |                                                   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/perf/arm_pmuv3.h:134:65: warning: initialized field overwritten [-Woverride-init]
     134 | #define ARMV8_IMPDEF_PERFCTR_L1D_TLB_WR                         0x004F
         |                                                                 ^~~~~~
   drivers/perf/arm_pmuv3.c:149:52: note: in expansion of macro 'ARMV8_IMPDEF_PERFCTR_L1D_TLB_WR'
     149 |         [C(DTLB)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_L1D_TLB_WR,
         |                                                    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/perf/arm_pmuv3.h:134:65: note: (near initialization for 'armv8_vulcan_perf_cache_map[3][1][0]')
     134 | #define ARMV8_IMPDEF_PERFCTR_L1D_TLB_WR                         0x004F
         |                                                                 ^~~~~~
   drivers/perf/arm_pmuv3.c:149:52: note: in expansion of macro 'ARMV8_IMPDEF_PERFCTR_L1D_TLB_WR'
     149 |         [C(DTLB)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_L1D_TLB_WR,
         |                                                    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/perf/arm_pmuv3.h:131:65: warning: initialized field overwritten [-Woverride-init]
     131 | #define ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_RD                  0x004C
         |                                                                 ^~~~~~
   drivers/perf/arm_pmuv3.c:150:51: note: in expansion of macro 'ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_RD'
     150 |         [C(DTLB)][C(OP_READ)][C(RESULT_MISS)]   = ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_RD,
         |                                                   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/perf/arm_pmuv3.h:131:65: note: (near initialization for 'armv8_vulcan_perf_cache_map[3][0][1]')
     131 | #define ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_RD                  0x004C
         |                                                                 ^~~~~~
   drivers/perf/arm_pmuv3.c:150:51: note: in expansion of macro 'ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_RD'
     150 |         [C(DTLB)][C(OP_READ)][C(RESULT_MISS)]   = ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_RD,
         |                                                   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/perf/arm_pmuv3.h:132:65: warning: initialized field overwritten [-Woverride-init]
     132 | #define ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_WR                  0x004D
         |                                                                 ^~~~~~
   drivers/perf/arm_pmuv3.c:151:51: note: in expansion of macro 'ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_WR'
     151 |         [C(DTLB)][C(OP_WRITE)][C(RESULT_MISS)]  = ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_WR,
         |                                                   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/perf/arm_pmuv3.h:132:65: note: (near initialization for 'armv8_vulcan_perf_cache_map[3][1][1]')
     132 | #define ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_WR                  0x004D
         |                                                                 ^~~~~~
   drivers/perf/arm_pmuv3.c:151:51: note: in expansion of macro 'ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_WR'
     151 |         [C(DTLB)][C(OP_WRITE)][C(RESULT_MISS)]  = ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_WR,
         |                                                   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/perf/arm_pmuv3.h:148:65: warning: initialized field overwritten [-Woverride-init]
     148 | #define ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_RD                      0x0060
         |                                                                 ^~~~~~
   drivers/perf/arm_pmuv3.c:153:51: note: in expansion of macro 'ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_RD'
     153 |         [C(NODE)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_RD,
         |                                                   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/perf/arm_pmuv3.h:148:65: note: (near initialization for 'armv8_vulcan_perf_cache_map[6][0][0]')
     148 | #define ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_RD                      0x0060
         |                                                                 ^~~~~~
   drivers/perf/arm_pmuv3.c:153:51: note: in expansion of macro 'ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_RD'
     153 |         [C(NODE)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_RD,
         |                                                   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/perf/arm_pmuv3.h:149:65: warning: initialized field overwritten [-Woverride-init]
     149 | #define ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_WR                      0x0061
         |                                                                 ^~~~~~
   drivers/perf/arm_pmuv3.c:154:52: note: in expansion of macro 'ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_WR'
     154 |         [C(NODE)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_WR,
         |                                                    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/perf/arm_pmuv3.h:149:65: note: (near initialization for 'armv8_vulcan_perf_cache_map[6][1][0]')
     149 | #define ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_WR                      0x0061
         |                                                                 ^~~~~~
   drivers/perf/arm_pmuv3.c:154:52: note: in expansion of macro 'ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_WR'
     154 |         [C(NODE)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_WR,
         |                                                    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/perf/arm_pmuv3.c:1174:35: error: initialization of '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 *)'} from incompatible pointer type 'int (*)(struct ctl_table *, int,  void *, size_t *, loff_t *)' {aka 'int (*)(struct ctl_table *, int,  void *, long unsigned int *, long long int *)'} [-Werror=incompatible-pointer-types]
    1174 |                 .proc_handler   = armv8pmu_proc_user_access_handler,
         |                                   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/perf/arm_pmuv3.c:1174:35: note: (near initialization for 'armv8_pmu_sysctl_table[0].proc_handler')
   cc1: some warnings being treated as errors


vim +1174 drivers/perf/arm_pmuv3.c

83a7a4d643d33a arch/arm64/kernel/perf_event.c Rob Herring 2021-12-08  1167  
e2012600810c9d arch/arm64/kernel/perf_event.c Rob Herring 2021-12-08  1168  static struct ctl_table armv8_pmu_sysctl_table[] = {
e2012600810c9d arch/arm64/kernel/perf_event.c Rob Herring 2021-12-08  1169  	{
e2012600810c9d arch/arm64/kernel/perf_event.c Rob Herring 2021-12-08  1170  		.procname       = "perf_user_access",
e2012600810c9d arch/arm64/kernel/perf_event.c Rob Herring 2021-12-08  1171  		.data		= &sysctl_perf_user_access,
e2012600810c9d arch/arm64/kernel/perf_event.c Rob Herring 2021-12-08  1172  		.maxlen		= sizeof(unsigned int),
e2012600810c9d arch/arm64/kernel/perf_event.c Rob Herring 2021-12-08  1173  		.mode           = 0644,
83a7a4d643d33a arch/arm64/kernel/perf_event.c Rob Herring 2021-12-08 @1174  		.proc_handler	= armv8pmu_proc_user_access_handler,
e2012600810c9d arch/arm64/kernel/perf_event.c Rob Herring 2021-12-08  1175  		.extra1		= SYSCTL_ZERO,
e2012600810c9d arch/arm64/kernel/perf_event.c Rob Herring 2021-12-08  1176  		.extra2		= SYSCTL_ONE,
e2012600810c9d arch/arm64/kernel/perf_event.c Rob Herring 2021-12-08  1177  	},
e2012600810c9d arch/arm64/kernel/perf_event.c Rob Herring 2021-12-08  1178  };
e2012600810c9d arch/arm64/kernel/perf_event.c Rob Herring 2021-12-08  1179  

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https://github.com/intel/lkp-tests/wiki

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