[asahilinux:bits/220-tso 3/4] arch/arm64/kernel/process.c:544:5: warning: no previous prototype for function 'arch_prctl_mem_model_get'

kernel test robot
2023-11-20T09:25:00Z

tree: https://github.com/AsahiLinux/linux bits/220-tso
head: 308062b9b17efd95c1c98c7c2cf667f620492fce
commit: 358a9e2c2286df9864eff73ff2baeb4efe94c66e [3/4] arm64: Implement PR_{GET,SET}_MEM_MODEL for always-TSO CPUs
config: arm64-randconfig-001-20231120 (https://download.01.org/0day-ci/archive/20231120/202311201703.SyraK0kl-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project.git 4a5ac14ee968ff0ad5d2cc1ffa0299048db4c88a)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231120/202311201703.SyraK0kl-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202311201703.SyraK0kl-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> arch/arm64/kernel/process.c:544:5: warning: no previous prototype for function 'arch_prctl_mem_model_get' [-Wmissing-prototypes]
544 | int arch_prctl_mem_model_get(struct task_struct *t)
| ^
arch/arm64/kernel/process.c:544:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
544 | int arch_prctl_mem_model_get(struct task_struct *t)
| ^
| static
>> arch/arm64/kernel/process.c:549:5: warning: no previous prototype for function 'arch_prctl_mem_model_set' [-Wmissing-prototypes]
549 | int arch_prctl_mem_model_set(struct task_struct *t, unsigned long val)
| ^
arch/arm64/kernel/process.c:549:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
549 | int arch_prctl_mem_model_set(struct task_struct *t, unsigned long val)
| ^
| static
2 warnings generated.

vim +/arch_prctl_mem_model_get +544 arch/arm64/kernel/process.c

542
543 #ifdef CONFIG_ARM64_MEMORY_MODEL_CONTROL
> 544 int arch_prctl_mem_model_get(struct task_struct *t)
545 {
546 return PR_SET_MEM_MODEL_DEFAULT;
547 }
548
> 549 int arch_prctl_mem_model_set(struct task_struct *t, unsigned long val)
550 {
551 if (cpus_have_const_cap(ARM64_HAS_TSO_FIXED) &&
552 val == PR_SET_MEM_MODEL_TSO)
553 return 0;
554
555 if (val == PR_SET_MEM_MODEL_DEFAULT)
556 return 0;
557
558 return -EINVAL;
559 }
560 #endif
561

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