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Date: Wed, 27 Oct 2021 17:22:29 +0800
From: kernel test robot <lkp@...el.com>
To: Rob Herring <robh@...nel.org>
Cc: llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
linux-kernel@...r.kernel.org
Subject: [robh:arm64-user-perf-event-v11 4/5]
arch/arm64/kernel/perf_event.c:1191:5: warning: no previous prototype for
function 'armv8pmu_proc_user_access_handler'
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-r005-20211027 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 5db7568a6a1fcb408eb8988abdaff2a225a8eb72)
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
# install arm64 cross compiling tool for clang build
# apt-get install binutils-aarch64-linux-gnu
# 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=clang make.cross W=1 ARCH=arm64
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>
All warnings (new ones prefixed by >>):
^~~~
arch/arm64/kernel/perf_event.c:140:2: note: previous initialization is here
PERF_CACHE_MAP_ALL_UNSUPPORTED,
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/perf/arm_pmu.h:40:31: note: expanded from macro 'PERF_CACHE_MAP_ALL_UNSUPPORTED'
[0 ... C(RESULT_MAX) - 1] = CACHE_OP_UNSUPPORTED, \
^~~~~~~~~~~~~~~~~~~~
include/linux/perf/arm_pmu.h:32:31: note: expanded from macro 'CACHE_OP_UNSUPPORTED'
#define CACHE_OP_UNSUPPORTED 0xFFFF
^~~~~~
arch/arm64/kernel/perf_event.c:147:44: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides]
[C(DTLB)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_L1D_TLB_RD,
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/arm64/include/asm/perf_event.h:122:44: note: expanded from macro 'ARMV8_IMPDEF_PERFCTR_L1D_TLB_RD'
#define ARMV8_IMPDEF_PERFCTR_L1D_TLB_RD 0x4E
^~~~
arch/arm64/kernel/perf_event.c:140:2: note: previous initialization is here
PERF_CACHE_MAP_ALL_UNSUPPORTED,
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/perf/arm_pmu.h:40:31: note: expanded from macro 'PERF_CACHE_MAP_ALL_UNSUPPORTED'
[0 ... C(RESULT_MAX) - 1] = CACHE_OP_UNSUPPORTED, \
^~~~~~~~~~~~~~~~~~~~
include/linux/perf/arm_pmu.h:32:31: note: expanded from macro 'CACHE_OP_UNSUPPORTED'
#define CACHE_OP_UNSUPPORTED 0xFFFF
^~~~~~
arch/arm64/kernel/perf_event.c:148:45: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides]
[C(DTLB)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_L1D_TLB_WR,
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/arm64/include/asm/perf_event.h:123:44: note: expanded from macro 'ARMV8_IMPDEF_PERFCTR_L1D_TLB_WR'
#define ARMV8_IMPDEF_PERFCTR_L1D_TLB_WR 0x4F
^~~~
arch/arm64/kernel/perf_event.c:140:2: note: previous initialization is here
PERF_CACHE_MAP_ALL_UNSUPPORTED,
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/perf/arm_pmu.h:40:31: note: expanded from macro 'PERF_CACHE_MAP_ALL_UNSUPPORTED'
[0 ... C(RESULT_MAX) - 1] = CACHE_OP_UNSUPPORTED, \
^~~~~~~~~~~~~~~~~~~~
include/linux/perf/arm_pmu.h:32:31: note: expanded from macro 'CACHE_OP_UNSUPPORTED'
#define CACHE_OP_UNSUPPORTED 0xFFFF
^~~~~~
arch/arm64/kernel/perf_event.c:149:42: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides]
[C(DTLB)][C(OP_READ)][C(RESULT_MISS)] = ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_RD,
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/arm64/include/asm/perf_event.h:120:50: note: expanded from macro 'ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_RD'
#define ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_RD 0x4C
^~~~
arch/arm64/kernel/perf_event.c:140:2: note: previous initialization is here
PERF_CACHE_MAP_ALL_UNSUPPORTED,
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/perf/arm_pmu.h:40:31: note: expanded from macro 'PERF_CACHE_MAP_ALL_UNSUPPORTED'
[0 ... C(RESULT_MAX) - 1] = CACHE_OP_UNSUPPORTED, \
^~~~~~~~~~~~~~~~~~~~
include/linux/perf/arm_pmu.h:32:31: note: expanded from macro 'CACHE_OP_UNSUPPORTED'
#define CACHE_OP_UNSUPPORTED 0xFFFF
^~~~~~
arch/arm64/kernel/perf_event.c:150:43: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides]
[C(DTLB)][C(OP_WRITE)][C(RESULT_MISS)] = ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_WR,
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/arm64/include/asm/perf_event.h:121:50: note: expanded from macro 'ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_WR'
#define ARMV8_IMPDEF_PERFCTR_L1D_TLB_REFILL_WR 0x4D
^~~~
arch/arm64/kernel/perf_event.c:140:2: note: previous initialization is here
PERF_CACHE_MAP_ALL_UNSUPPORTED,
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/perf/arm_pmu.h:40:31: note: expanded from macro 'PERF_CACHE_MAP_ALL_UNSUPPORTED'
[0 ... C(RESULT_MAX) - 1] = CACHE_OP_UNSUPPORTED, \
^~~~~~~~~~~~~~~~~~~~
include/linux/perf/arm_pmu.h:32:31: note: expanded from macro 'CACHE_OP_UNSUPPORTED'
#define CACHE_OP_UNSUPPORTED 0xFFFF
^~~~~~
arch/arm64/kernel/perf_event.c:152:44: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides]
[C(NODE)][C(OP_READ)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_RD,
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/arm64/include/asm/perf_event.h:137:46: note: expanded from macro 'ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_RD'
#define ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_RD 0x60
^~~~
arch/arm64/kernel/perf_event.c:140:2: note: previous initialization is here
PERF_CACHE_MAP_ALL_UNSUPPORTED,
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/perf/arm_pmu.h:40:31: note: expanded from macro 'PERF_CACHE_MAP_ALL_UNSUPPORTED'
[0 ... C(RESULT_MAX) - 1] = CACHE_OP_UNSUPPORTED, \
^~~~~~~~~~~~~~~~~~~~
include/linux/perf/arm_pmu.h:32:31: note: expanded from macro 'CACHE_OP_UNSUPPORTED'
#define CACHE_OP_UNSUPPORTED 0xFFFF
^~~~~~
arch/arm64/kernel/perf_event.c:153:45: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides]
[C(NODE)][C(OP_WRITE)][C(RESULT_ACCESS)] = ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_WR,
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/arm64/include/asm/perf_event.h:138:46: note: expanded from macro 'ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_WR'
#define ARMV8_IMPDEF_PERFCTR_BUS_ACCESS_WR 0x61
^~~~
arch/arm64/kernel/perf_event.c:140:2: note: previous initialization is here
PERF_CACHE_MAP_ALL_UNSUPPORTED,
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/perf/arm_pmu.h:40:31: note: expanded from macro 'PERF_CACHE_MAP_ALL_UNSUPPORTED'
[0 ... C(RESULT_MAX) - 1] = CACHE_OP_UNSUPPORTED, \
^~~~~~~~~~~~~~~~~~~~
include/linux/perf/arm_pmu.h:32:31: note: expanded from macro 'CACHE_OP_UNSUPPORTED'
#define CACHE_OP_UNSUPPORTED 0xFFFF
^~~~~~
>> arch/arm64/kernel/perf_event.c:1191:5: warning: no previous prototype for function 'armv8pmu_proc_user_access_handler' [-Wmissing-prototypes]
int armv8pmu_proc_user_access_handler(struct ctl_table *table, int write,
^
arch/arm64/kernel/perf_event.c:1191:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
int armv8pmu_proc_user_access_handler(struct ctl_table *table, int write,
^
static
57 warnings generated.
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@lists.01.org
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