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Subject[ammarfaizi2-block:google/android/kernel/common/android12-trusty-5.10 3280/5866] drivers/hwtracing/coresight/coresight-etm4x-core.c:118:5: warning: no previous prototype for 'ete_sysreg_read'
tree:   https://github.com/ammarfaizi2/linux-block google/android/kernel/common/android12-trusty-5.10
head: 52cdd137fae0b001197a51646289e3cbdda921d5
commit: 82ce4a8af88d25d3f75de6e8437de3d2f049cac3 [3280/5866] FROMLIST: coresight: ete: Add support for ETE sysreg access
config: arm64-allyesconfig (https://download.01.org/0day-ci/archive/20220127/202201271425.6ykSQC3p-lkp@intel.com/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://github.com/ammarfaizi2/linux-block/commit/82ce4a8af88d25d3f75de6e8437de3d2f049cac3
git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block
git fetch --no-tags ammarfaizi2-block google/android/kernel/common/android12-trusty-5.10
git checkout 82ce4a8af88d25d3f75de6e8437de3d2f049cac3
# save the config file to linux build tree
mkdir build_dir
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=arm64 SHELL=/bin/bash

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

All warnings (new ones prefixed by >>):

>> drivers/hwtracing/coresight/coresight-etm4x-core.c:118:5: warning: no previous prototype for 'ete_sysreg_read' [-Wmissing-prototypes]
118 | u64 ete_sysreg_read(u32 offset, bool _relaxed, bool _64bit)
| ^~~~~~~~~~~~~~~
>> drivers/hwtracing/coresight/coresight-etm4x-core.c:135:6: warning: no previous prototype for 'ete_sysreg_write' [-Wmissing-prototypes]
135 | void ete_sysreg_write(u64 val, u32 offset, bool _relaxed, bool _64bit)
| ^~~~~~~~~~~~~~~~


vim +/ete_sysreg_read +118 drivers/hwtracing/coresight/coresight-etm4x-core.c

117
> 118 u64 ete_sysreg_read(u32 offset, bool _relaxed, bool _64bit)
119 {
120 u64 res = 0;
121
122 switch (offset) {
123 ETE_READ_CASES(res)
124 default :
125 pr_warn_ratelimited("ete: trying to read unsupported register @%x\n",
126 offset);
127 }
128
129 if (!_relaxed)
130 __iormb(res); /* Imitate the !relaxed I/O helpers */
131
132 return res;
133 }
134
> 135 void ete_sysreg_write(u64 val, u32 offset, bool _relaxed, bool _64bit)
136 {
137 if (!_relaxed)
138 __iowmb(); /* Imitate the !relaxed I/O helpers */
139 if (!_64bit)
140 val &= GENMASK(31, 0);
141
142 switch (offset) {
143 ETE_WRITE_CASES(val)
144 default :
145 pr_warn_ratelimited("ete: trying to write to unsupported register @%x\n",
146 offset);
147 }
148 }
149

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

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