[robh:arm64-user-perf-event-v11 4/5] arch/arm64/kernel/perf_event.c:1191:5: warning: no previous prototype for 'armv8pmu_proc_user_access_handler'

From: kernel test robot
Date: Sat Nov 13 2021 - 00:00:58 EST

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tree: https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git arm64-user-perf-event-v11
head: a5385068d760ce1abfab2609fdb662164f12c494
commit: e4f5fa6593ffb8f5e5c167566839f7ecf97628e2 [4/5] arm64: perf: Enable PMU counter userspace access for perf event
config: arm64-randconfig-p001-20211019 (attached as .config)
compiler: aarch64-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://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git/commit/?id=e4f5fa6593ffb8f5e5c167566839f7ecf97628e2
git remote add robh https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git
git fetch --no-tags robh arm64-user-perf-event-v11
git checkout e4f5fa6593ffb8f5e5c167566839f7ecf97628e2
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=arm64

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>

All warnings (new ones prefixed by >>):

| ^~~~
arch/arm64/kernel/perf_event.c:143:51: note: in expansion of macro 'ARMV8_IMPDEF_PERFCTR_L1D_CACHE_REFILL_RD'
143 | [C(L1D)][C(OP_READ)][C(RESULT_MISS)] = ARMV8_IMPDEF_PERFCTR_L1D_CACHE_REFILL_RD,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/arm64/include/asm/perf_event.h:111:65: warning: initialized field overwritten [-Woverride-init]
111 | #define ARMV8_IMPDEF_PERFCTR_L1D_CACHE_WR 0x41
| ^~~~
arch/arm64/kernel/perf_event.c:144:51: note: in expansion of macro 'ARMV8_IMPDEF_PERFCTR_L1D_CACHE_WR'
144 | [C(L1D)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_L1D_CACHE_WR,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/arm64/include/asm/perf_event.h:111:65: note: (near initialization for 'armv8_vulcan_perf_cache_map[0][1][0]')
111 | #define ARMV8_IMPDEF_PERFCTR_L1D_CACHE_WR 0x41
| ^~~~
arch/arm64/kernel/perf_event.c:144:51: note: in expansion of macro 'ARMV8_IMPDEF_PERFCTR_L1D_CACHE_WR'
144 | [C(L1D)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_L1D_CACHE_WR,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/arm64/include/asm/perf_event.h:113:65: warning: initialized field overwritten [-Woverride-init]
113 | #define ARMV8_IMPDEF_PERFCTR_L1D_CACHE_REFILL_WR 0x43
| ^~~~
arch/arm64/kernel/perf_event.c:145:51: note: in expansion of macro 'ARMV8_IMPDEF_PERFCTR_L1D_CACHE_REFILL_WR'
145 | [C(L1D)][C(OP_WRITE)][C(RESULT_MISS)] = ARMV8_IMPDEF_PERFCTR_L1D_CACHE_REFILL_WR,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/arm64/include/asm/perf_event.h:113:65: note: (near initialization for 'armv8_vulcan_perf_cache_map[0][1][1]')
113 | #define ARMV8_IMPDEF_PERFCTR_L1D_CACHE_REFILL_WR 0x43
| ^~~~
arch/arm64/kernel/perf_event.c:145:51: note: in expansion of macro 'ARMV8_IMPDEF_PERFCTR_L1D_CACHE_REFILL_WR'
145 | [C(L1D)][C(OP_WRITE)][C(RESULT_MISS)] = ARMV8_IMPDEF_PERFCTR_L1D_CACHE_REFILL_WR,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/arm64/include/asm/perf_event.h:122:65: warning: initialized field overwritten [-Woverride-init]
122 | #define ARMV8_IMPDEF_PERFCTR_L1D_TLB_RD 0x4E
| ^~~~
arch/arm64/kernel/perf_event.c:147:51: note: in expansion of macro 'ARMV8_IMPDEF_PERFCTR_L1D_TLB_RD'
147 | [C(DTLB)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_L1D_TLB_RD,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/arm64/include/asm/perf_event.h:122:65: note: (near initialization for 'armv8_vulcan_perf_cache_map[3][0][0]')
122 | #define ARMV8_IMPDEF_PERFCTR_L1D_TLB_RD 0x4E
| ^~~~
arch/arm64/kernel/perf_event.c:147:51: note: in expansion of macro 'ARMV8_IMPDEF_PERFCTR_L1D_TLB_RD'
147 | [C(DTLB)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_L1D_TLB_RD,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/arm64/include/asm/perf_event.h:123:65: warning: initialized field overwritten [-Woverride-init]
123 | #define ARMV8_IMPDEF_PERFCTR_L1D_TLB_WR 0x4F
| ^~~~
arch/arm64/kernel/perf_event.c:148:52: note: in expansion of macro 'ARMV8_IMPDEF_PERFCTR_L1D_TLB_WR'
148 | [C(DTLB)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_L1D_TLB_WR,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/arm64/include/asm/perf_event.h:123:65: note: (near initialization for 'armv8_vulcan_perf_cache_map[3][1][0]')
123 | #define ARMV8_IMPDEF_PERFCTR_L1D_TLB_WR 0x4F
| ^~~~
arch/arm64/kernel/perf_event.c:148:52: note: in expansion of macro 'ARMV8_IMPDEF_PERFCTR_L1D_TLB_WR'
148 | [C(DTLB)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_L1D_TLB_WR,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/arm64/include/asm/perf_event.h:120:65: warning: initialized field overwritten [-Woverride-init]
120 | #define ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_RD 0x4C
| ^~~~
arch/arm64/kernel/perf_event.c:149:51: note: in expansion of macro 'ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_RD'
149 | [C(DTLB)][C(OP_READ)][C(RESULT_MISS)] = ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_RD,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/arm64/include/asm/perf_event.h:120:65: note: (near initialization for 'armv8_vulcan_perf_cache_map[3][0][1]')
120 | #define ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_RD 0x4C
| ^~~~
arch/arm64/kernel/perf_event.c:149:51: note: in expansion of macro 'ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_RD'
149 | [C(DTLB)][C(OP_READ)][C(RESULT_MISS)] = ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_RD,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/arm64/include/asm/perf_event.h:121:65: warning: initialized field overwritten [-Woverride-init]
121 | #define ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_WR 0x4D
| ^~~~
arch/arm64/kernel/perf_event.c:150:51: note: in expansion of macro 'ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_WR'
150 | [C(DTLB)][C(OP_WRITE)][C(RESULT_MISS)] = ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_WR,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/arm64/include/asm/perf_event.h:121:65: note: (near initialization for 'armv8_vulcan_perf_cache_map[3][1][1]')
121 | #define ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_WR 0x4D
| ^~~~
arch/arm64/kernel/perf_event.c:150:51: note: in expansion of macro 'ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_WR'
150 | [C(DTLB)][C(OP_WRITE)][C(RESULT_MISS)] = ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_WR,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/arm64/include/asm/perf_event.h:137:65: warning: initialized field overwritten [-Woverride-init]
137 | #define ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_RD 0x60
| ^~~~
arch/arm64/kernel/perf_event.c:152:51: note: in expansion of macro 'ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_RD'
152 | [C(NODE)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_RD,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/arm64/include/asm/perf_event.h:137:65: note: (near initialization for 'armv8_vulcan_perf_cache_map[6][0][0]')
137 | #define ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_RD 0x60
| ^~~~
arch/arm64/kernel/perf_event.c:152:51: note: in expansion of macro 'ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_RD'
152 | [C(NODE)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_RD,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/arm64/include/asm/perf_event.h:138:65: warning: initialized field overwritten [-Woverride-init]
138 | #define ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_WR 0x61
| ^~~~
arch/arm64/kernel/perf_event.c:153:52: note: in expansion of macro 'ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_WR'
153 | [C(NODE)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_WR,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/arm64/include/asm/perf_event.h:138:65: note: (near initialization for 'armv8_vulcan_perf_cache_map[6][1][0]')
138 | #define ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_WR 0x61
| ^~~~
arch/arm64/kernel/perf_event.c:153:52: note: in expansion of macro 'ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_WR'
153 | [C(NODE)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_WR,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> arch/arm64/kernel/perf_event.c:1191:5: warning: no previous prototype for 'armv8pmu_proc_user_access_handler' [-Wmissing-prototypes]
1191 | int armv8pmu_proc_user_access_handler(struct ctl_table *table, int write,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

cppcheck possible warnings: (new ones prefixed by >>, may not real problems)

>> arch/arm64/kernel/perf_event.c:299:2: warning: Non-boolean value returned from function returning bool [returnNonBoolInBooleanFunction]
return event->attr.config1 & 0x2;
^

vim +/armv8pmu_proc_user_access_handler +1191 arch/arm64/kernel/perf_event.c

1190
> 1191 int armv8pmu_proc_user_access_handler(struct ctl_table *table, int write,
1192 void *buffer, size_t *lenp, loff_t *ppos)
1193 {
1194 int ret = proc_dointvec_minmax(table, write, buffer, lenp, ppos);
1195 if (ret || !write || sysctl_perf_user_access)
1196 return ret;
1197
1198 on_each_cpu(armv8pmu_disable_user_access_ipi, NULL, 1);
1199 return 0;
1200 }
1201

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx

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Next message: Saurav Girepunje: "Re: [PATCH] staging: r8188eu: core: remove goto statement"
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