include/linux/percpu-defs.h:317:1: warning: initialization of 'struct cpumask *' from 'int' makes pointer from integer without a cast

From: kernel test robot
Date: Tue Jun 21 2022 - 22:22:41 EST

tree: https://github.com/intel-lab-lkp/linux/commits/Vincent-Donnefort/feec-energy-margin-removal/20220621-170631
head: 2059fff7a5a2b6016ef5843c673845283a00a646
commit: a4a1ec79913664ac49b72cda8c3756c4da7c16b4 sched/fair: Rename select_idle_mask to select_rq_mask
date: 17 hours ago
config: x86_64-rhel-8.3 (https://download.01.org/0day-ci/archive/20220622/202206221013.ygryuYit-lkp@xxxxxxxxx/config)
compiler: gcc-11 (Debian 11.3.0-3) 11.3.0
reproduce (this is a W=1 build):
# https://github.com/intel-lab-lkp/linux/commit/a4a1ec79913664ac49b72cda8c3756c4da7c16b4
git remote add linux-review https://github.com/intel-lab-lkp/linux
git fetch --no-tags linux-review Vincent-Donnefort/feec-energy-margin-removal/20220621-170631
git checkout a4a1ec79913664ac49b72cda8c3756c4da7c16b4
# save the config file
mkdir build_dir && cp config build_dir/.config
make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash kernel/sched/

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

All warnings (new ones prefixed by >>):

In file included from include/asm-generic/percpu.h:7,
from arch/x86/include/asm/percpu.h:390,
from arch/x86/include/asm/current.h:6,
from include/linux/sched.h:12,
from include/linux/ratelimit.h:6,
from include/linux/dev_printk.h:16,
from include/linux/device.h:15,
from include/linux/energy_model.h:5,
from kernel/sched/fair.c:23:
kernel/sched/fair.c: In function 'find_idlest_group':
kernel/sched/fair.c:9246:81: error: 'select_idle_mask' undeclared (first use in this function); did you mean 'select_idle_cpu'?
9246 | struct cpumask *cpus = this_cpu_cpumask_var_ptr(select_idle_mask);
| ^~~~~~~~~~~~~~~~
include/linux/percpu-defs.h:318:16: note: in definition of macro '__pcpu_size_call_return'
318 | typeof(variable) pscr_ret__; \
| ^~~~~~~~
include/linux/cpumask.h:742:41: note: in expansion of macro 'this_cpu_read'
742 | #define this_cpu_cpumask_var_ptr(x) this_cpu_read(x)
| ^~~~~~~~~~~~~
kernel/sched/fair.c:9246:56: note: in expansion of macro 'this_cpu_cpumask_var_ptr'
9246 | struct cpumask *cpus = this_cpu_cpumask_var_ptr(select_idle_mask);
| ^~~~~~~~~~~~~~~~~~~~~~~~
kernel/sched/fair.c:9246:81: note: each undeclared identifier is reported only once for each function it appears in
9246 | struct cpumask *cpus = this_cpu_cpumask_var_ptr(select_idle_mask);
| ^~~~~~~~~~~~~~~~
include/linux/percpu-defs.h:318:16: note: in definition of macro '__pcpu_size_call_return'
318 | typeof(variable) pscr_ret__; \
| ^~~~~~~~
include/linux/cpumask.h:742:41: note: in expansion of macro 'this_cpu_read'
742 | #define this_cpu_cpumask_var_ptr(x) this_cpu_read(x)
| ^~~~~~~~~~~~~
kernel/sched/fair.c:9246:56: note: in expansion of macro 'this_cpu_cpumask_var_ptr'
9246 | struct cpumask *cpus = this_cpu_cpumask_var_ptr(select_idle_mask);
| ^~~~~~~~~~~~~~~~~~~~~~~~
>> include/linux/percpu-defs.h:317:1: warning: initialization of 'struct cpumask *' from 'int' makes pointer from integer without a cast [-Wint-conversion]
317 | ({ \
| ^
include/linux/percpu-defs.h:507:41: note: in expansion of macro '__pcpu_size_call_return'
507 | #define this_cpu_read(pcp) __pcpu_size_call_return(this_cpu_read_, pcp)
| ^~~~~~~~~~~~~~~~~~~~~~~
include/linux/cpumask.h:742:41: note: in expansion of macro 'this_cpu_read'
742 | #define this_cpu_cpumask_var_ptr(x) this_cpu_read(x)
| ^~~~~~~~~~~~~
kernel/sched/fair.c:9246:56: note: in expansion of macro 'this_cpu_cpumask_var_ptr'
9246 | struct cpumask *cpus = this_cpu_cpumask_var_ptr(select_idle_mask);
| ^~~~~~~~~~~~~~~~~~~~~~~~


vim +317 include/linux/percpu-defs.h

a32f8d8eda8bd49 Tejun Heo 2014-06-17 315
a32f8d8eda8bd49 Tejun Heo 2014-06-17 316 #define __pcpu_size_call_return(stem, variable) \
eba117889ac444b Tejun Heo 2014-06-17 @317 ({ \
eba117889ac444b Tejun Heo 2014-06-17 318 typeof(variable) pscr_ret__; \
a32f8d8eda8bd49 Tejun Heo 2014-06-17 319 __verify_pcpu_ptr(&(variable)); \
a32f8d8eda8bd49 Tejun Heo 2014-06-17 320 switch(sizeof(variable)) { \
a32f8d8eda8bd49 Tejun Heo 2014-06-17 321 case 1: pscr_ret__ = stem##1(variable); break; \
a32f8d8eda8bd49 Tejun Heo 2014-06-17 322 case 2: pscr_ret__ = stem##2(variable); break; \
a32f8d8eda8bd49 Tejun Heo 2014-06-17 323 case 4: pscr_ret__ = stem##4(variable); break; \
a32f8d8eda8bd49 Tejun Heo 2014-06-17 324 case 8: pscr_ret__ = stem##8(variable); break; \
a32f8d8eda8bd49 Tejun Heo 2014-06-17 325 default: \
a32f8d8eda8bd49 Tejun Heo 2014-06-17 326 __bad_size_call_parameter(); break; \
a32f8d8eda8bd49 Tejun Heo 2014-06-17 327 } \
a32f8d8eda8bd49 Tejun Heo 2014-06-17 328 pscr_ret__; \
a32f8d8eda8bd49 Tejun Heo 2014-06-17 329 })
a32f8d8eda8bd49 Tejun Heo 2014-06-17 330

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