Messages in this thread | | | Date | Fri, 10 Jun 2022 19:55:25 +0800 | From | kernel test robot <> | Subject | [kas:lam 6/8] arch/x86/kernel/process_64.c:745:5: warning: no previous prototype for 'prctl_enable_tagged_addr' |
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tree: https://git.kernel.org/pub/scm/linux/kernel/git/kas/linux.git lam head: 83ba389477b29461f0c926b69deca5eb6f3f5b6a commit: 91934401d053c31ea7851a9e88fa83b9fa5a7bc4 [6/8] x86/mm: Provide ARCH_GET_UNTAG_MASK and ARCH_ENABLE_TAGGED_ADDR config: x86_64-defconfig (https://download.01.org/0day-ci/archive/20220610/202206101916.IklgUdbQ-lkp@intel.com/config) compiler: gcc-11 (Debian 11.3.0-3) 11.3.0 reproduce (this is a W=1 build): # https://git.kernel.org/pub/scm/linux/kernel/git/kas/linux.git/commit/?id=91934401d053c31ea7851a9e88fa83b9fa5a7bc4 git remote add kas https://git.kernel.org/pub/scm/linux/kernel/git/kas/linux.git git fetch --no-tags kas lam git checkout 91934401d053c31ea7851a9e88fa83b9fa5a7bc4 # save the config file mkdir build_dir && cp config build_dir/.config make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash arch/x86/kernel/
If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <lkp@intel.com>
All warnings (new ones prefixed by >>):
>> arch/x86/kernel/process_64.c:745:5: warning: no previous prototype for 'prctl_enable_tagged_addr' [-Wmissing-prototypes] 745 | int prctl_enable_tagged_addr(unsigned long nr_bits) | ^~~~~~~~~~~~~~~~~~~~~~~~
vim +/prctl_enable_tagged_addr +745 arch/x86/kernel/process_64.c
744 > 745 int prctl_enable_tagged_addr(unsigned long nr_bits) 746 { 747 struct mm_struct *mm = current->mm; 748 749 /* Already enabled? */ 750 if (mm->context.lam_cr3_mask) 751 return -EBUSY; 752 753 /* LAM has to be enabled before spawning threads */ 754 if (get_nr_threads(current) > 1) 755 return -EBUSY; 756 757 if (!nr_bits) { 758 return -EINVAL; 759 } else if (nr_bits <= 6) { 760 mm->context.lam_cr3_mask = X86_CR3_LAM_U57; 761 mm->context.untag_mask = ~GENMASK(62, 57); 762 } else { 763 return -EINVAL; 764 } 765 766 /* Update CR3 to get LAM active */ 767 switch_mm(current->mm, current->mm, current); 768 return 0; 769 } 770
-- 0-DAY CI Kernel Test Service https://01.org/lkp
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