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Subject[pdx86-platform-drivers-x86:review-hans 46/59] kernel/stop_machine.c:638:35: error: call to undeclared function 'cpu_smt_mask'; ISO C99 and later do not support implicit function declarations
tree:   https://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86.git review-hans
head: 57709a27d9744f5af4bbeec3ba3105c6aa1075eb
commit: 104355bf96bb985c40f8f8da43f70b935d59fb61 [46/59] stop_machine: Add stop_core_cpuslocked() for per-core operations
config: hexagon-randconfig-r045-20220509 (https://download.01.org/0day-ci/archive/20220512/202205120904.Gr9HEY5E-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 18dd123c56754edf62c7042dcf23185c3727610f)
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/pdx86/platform-drivers-x86.git/commit/?id=104355bf96bb985c40f8f8da43f70b935d59fb61
git remote add pdx86-platform-drivers-x86 https://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86.git
git fetch --no-tags pdx86-platform-drivers-x86 review-hans
git checkout 104355bf96bb985c40f8f8da43f70b935d59fb61
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash

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

All error/warnings (new ones prefixed by >>):

>> kernel/stop_machine.c:638:35: error: call to undeclared function 'cpu_smt_mask'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
const struct cpumask *smt_mask = cpu_smt_mask(cpu);
^
kernel/stop_machine.c:638:35: note: did you mean 'cpu_cpu_mask'?
include/linux/topology.h:250:37: note: 'cpu_cpu_mask' declared here
static inline const struct cpumask *cpu_cpu_mask(int cpu)
^
>> kernel/stop_machine.c:638:24: warning: incompatible integer to pointer conversion initializing 'const struct cpumask *' with an expression of type 'int' [-Wint-conversion]
const struct cpumask *smt_mask = cpu_smt_mask(cpu);
^ ~~~~~~~~~~~~~~~~~
1 warning and 1 error generated.


vim +/cpu_smt_mask +638 kernel/stop_machine.c

635
636 int stop_core_cpuslocked(unsigned int cpu, cpu_stop_fn_t fn, void *data)
637 {
> 638 const struct cpumask *smt_mask = cpu_smt_mask(cpu);
639
640 struct multi_stop_data msdata = {
641 .fn = fn,
642 .data = data,
643 .num_threads = cpumask_weight(smt_mask),
644 .active_cpus = smt_mask,
645 };
646
647 lockdep_assert_cpus_held();
648
649 /* Set the initial state and stop all online cpus. */
650 set_state(&msdata, MULTI_STOP_PREPARE);
651 return stop_cpus(smt_mask, multi_cpu_stop, &msdata);
652 }
653 EXPORT_SYMBOL_GPL(stop_core_cpuslocked);
654

--
0-DAY CI Kernel Test Service
https://01.org/lkp

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