Hi Usama, kernel test robot noticed the following build errors: [auto build test ERROR on akpm-mm/mm-everything] [also build test ERROR on perf-tools-next/perf-tools-next tip/perf/core perf-tools/perf-tools linus/master v6.15-rc7] [cannot apply to acme/perf/core next-20250516] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Usama-Arif/mm-khugepaged-extract-vm-flag-setting-outside-of-hugepage_madvise/20250520-063452 base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything patch link: https://lore.kernel.org/r/20250519223307.3601786-3-usamaarif642%40gmail.com patch subject: [PATCH v3 2/7] prctl: introduce PR_DEFAULT_MADV_HUGEPAGE for the process config: s390-randconfig-001-20250520 (https://download.01.org/0day-ci/archive/20250520/202505201614.N4SXnAln-lkp@xxxxxxxxx/config) compiler: clang version 21.0.0git (https://github.com/llvm/llvm-project f819f46284f2a79790038e1f6649172789734ae8) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250520/202505201614.N4SXnAln-lkp@xxxxxxxxx/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@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202505201614.N4SXnAln-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): >> kernel/sys.c:2678:9: error: call to undeclared function 'hugepage_global_enabled'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] 2678 | if (!hugepage_global_enabled()) | ^ >> kernel/sys.c:2680:12: error: call to undeclared function 'hugepage_set_vmflags'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] 2680 | error = hugepage_set_vmflags(&mm->def_flags, MADV_HUGEPAGE); | ^ >> kernel/sys.c:2682:5: error: call to undeclared function 'process_default_madv_hugepage'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] 2682 | process_default_madv_hugepage(mm, MADV_HUGEPAGE); | ^ 3 errors generated. vim +/hugepage_global_enabled +2678 kernel/sys.c 2472 2473 SYSCALL_DEFINE5(prctl, int, option, unsigned long, arg2, unsigned long, arg3, 2474 unsigned long, arg4, unsigned long, arg5) 2475 { 2476 struct task_struct *me = current; 2477 struct mm_struct *mm = me->mm; 2478 unsigned char comm[sizeof(me->comm)]; 2479 long error; 2480 2481 error = security_task_prctl(option, arg2, arg3, arg4, arg5); 2482 if (error != -ENOSYS) 2483 return error; 2484 2485 error = 0; 2486 switch (option) { 2487 case PR_SET_PDEATHSIG: 2488 if (!valid_signal(arg2)) { 2489 error = -EINVAL; 2490 break; 2491 } 2492 me->pdeath_signal = arg2; 2493 break; 2494 case PR_GET_PDEATHSIG: 2495 error = put_user(me->pdeath_signal, (int __user *)arg2); 2496 break; 2497 case PR_GET_DUMPABLE: 2498 error = get_dumpable(me->mm); 2499 break; 2500 case PR_SET_DUMPABLE: 2501 if (arg2 != SUID_DUMP_DISABLE && arg2 != SUID_DUMP_USER) { 2502 error = -EINVAL; 2503 break; 2504 } 2505 set_dumpable(me->mm, arg2); 2506 break; 2507 2508 case PR_SET_UNALIGN: 2509 error = SET_UNALIGN_CTL(me, arg2); 2510 break; 2511 case PR_GET_UNALIGN: 2512 error = GET_UNALIGN_CTL(me, arg2); 2513 break; 2514 case PR_SET_FPEMU: 2515 error = SET_FPEMU_CTL(me, arg2); 2516 break; 2517 case PR_GET_FPEMU: 2518 error = GET_FPEMU_CTL(me, arg2); 2519 break; 2520 case PR_SET_FPEXC: 2521 error = SET_FPEXC_CTL(me, arg2); 2522 break; 2523 case PR_GET_FPEXC: 2524 error = GET_FPEXC_CTL(me, arg2); 2525 break; 2526 case PR_GET_TIMING: 2527 error = PR_TIMING_STATISTICAL; 2528 break; 2529 case PR_SET_TIMING: 2530 if (arg2 != PR_TIMING_STATISTICAL) 2531 error = -EINVAL; 2532 break; 2533 case PR_SET_NAME: 2534 comm[sizeof(me->comm) - 1] = 0; 2535 if (strncpy_from_user(comm, (char __user *)arg2, 2536 sizeof(me->comm) - 1) < 0) 2537 return -EFAULT; 2538 set_task_comm(me, comm); 2539 proc_comm_connector(me); 2540 break; 2541 case PR_GET_NAME: 2542 get_task_comm(comm, me); 2543 if (copy_to_user((char __user *)arg2, comm, sizeof(comm))) 2544 return -EFAULT; 2545 break; 2546 case PR_GET_ENDIAN: 2547 error = GET_ENDIAN(me, arg2); 2548 break; 2549 case PR_SET_ENDIAN: 2550 error = SET_ENDIAN(me, arg2); 2551 break; 2552 case PR_GET_SECCOMP: 2553 error = prctl_get_seccomp(); 2554 break; 2555 case PR_SET_SECCOMP: 2556 error = prctl_set_seccomp(arg2, (char __user *)arg3); 2557 break; 2558 case PR_GET_TSC: 2559 error = GET_TSC_CTL(arg2); 2560 break; 2561 case PR_SET_TSC: 2562 error = SET_TSC_CTL(arg2); 2563 break; 2564 case PR_TASK_PERF_EVENTS_DISABLE: 2565 error = perf_event_task_disable(); 2566 break; 2567 case PR_TASK_PERF_EVENTS_ENABLE: 2568 error = perf_event_task_enable(); 2569 break; 2570 case PR_GET_TIMERSLACK: 2571 if (current->timer_slack_ns > ULONG_MAX) 2572 error = ULONG_MAX; 2573 else 2574 error = current->timer_slack_ns; 2575 break; 2576 case PR_SET_TIMERSLACK: 2577 if (rt_or_dl_task_policy(current)) 2578 break; 2579 if (arg2 <= 0) 2580 current->timer_slack_ns = 2581 current->default_timer_slack_ns; 2582 else 2583 current->timer_slack_ns = arg2; 2584 break; 2585 case PR_MCE_KILL: 2586 if (arg4 | arg5) 2587 return -EINVAL; 2588 switch (arg2) { 2589 case PR_MCE_KILL_CLEAR: 2590 if (arg3 != 0) 2591 return -EINVAL; 2592 current->flags &= ~PF_MCE_PROCESS; 2593 break; 2594 case PR_MCE_KILL_SET: 2595 current->flags |= PF_MCE_PROCESS; 2596 if (arg3 == PR_MCE_KILL_EARLY) 2597 current->flags |= PF_MCE_EARLY; 2598 else if (arg3 == PR_MCE_KILL_LATE) 2599 current->flags &= ~PF_MCE_EARLY; 2600 else if (arg3 == PR_MCE_KILL_DEFAULT) 2601 current->flags &= 2602 ~(PF_MCE_EARLY|PF_MCE_PROCESS); 2603 else 2604 return -EINVAL; 2605 break; 2606 default: 2607 return -EINVAL; 2608 } 2609 break; 2610 case PR_MCE_KILL_GET: 2611 if (arg2 | arg3 | arg4 | arg5) 2612 return -EINVAL; 2613 if (current->flags & PF_MCE_PROCESS) 2614 error = (current->flags & PF_MCE_EARLY) ? 2615 PR_MCE_KILL_EARLY : PR_MCE_KILL_LATE; 2616 else 2617 error = PR_MCE_KILL_DEFAULT; 2618 break; 2619 case PR_SET_MM: 2620 error = prctl_set_mm(arg2, arg3, arg4, arg5); 2621 break; 2622 case PR_GET_TID_ADDRESS: 2623 error = prctl_get_tid_address(me, (int __user * __user *)arg2); 2624 break; 2625 case PR_SET_CHILD_SUBREAPER: 2626 me->signal->is_child_subreaper = !!arg2; 2627 if (!arg2) 2628 break; 2629 2630 walk_process_tree(me, propagate_has_child_subreaper, NULL); 2631 break; 2632 case PR_GET_CHILD_SUBREAPER: 2633 error = put_user(me->signal->is_child_subreaper, 2634 (int __user *)arg2); 2635 break; 2636 case PR_SET_NO_NEW_PRIVS: 2637 if (arg2 != 1 || arg3 || arg4 || arg5) 2638 return -EINVAL; 2639 2640 task_set_no_new_privs(current); 2641 break; 2642 case PR_GET_NO_NEW_PRIVS: 2643 if (arg2 || arg3 || arg4 || arg5) 2644 return -EINVAL; 2645 return task_no_new_privs(current) ? 1 : 0; 2646 case PR_GET_THP_DISABLE: 2647 if (arg2 || arg3 || arg4 || arg5) 2648 return -EINVAL; 2649 error = !!test_bit(MMF_DISABLE_THP, &me->mm->flags); 2650 break; 2651 case PR_SET_THP_DISABLE: 2652 if (arg3 || arg4 || arg5) 2653 return -EINVAL; 2654 if (mmap_write_lock_killable(me->mm)) 2655 return -EINTR; 2656 if (arg2) 2657 set_bit(MMF_DISABLE_THP, &me->mm->flags); 2658 else 2659 clear_bit(MMF_DISABLE_THP, &me->mm->flags); 2660 mmap_write_unlock(me->mm); 2661 break; 2662 case PR_GET_THP_POLICY: 2663 if (arg2 || arg3 || arg4 || arg5) 2664 return -EINVAL; 2665 if (mmap_write_lock_killable(mm)) 2666 return -EINTR; 2667 if (mm->def_flags & VM_HUGEPAGE) 2668 error = PR_DEFAULT_MADV_HUGEPAGE; 2669 mmap_write_unlock(mm); 2670 break; 2671 case PR_SET_THP_POLICY: 2672 if (arg3 || arg4 || arg5) 2673 return -EINVAL; 2674 if (mmap_write_lock_killable(mm)) 2675 return -EINTR; 2676 switch (arg2) { 2677 case PR_DEFAULT_MADV_HUGEPAGE: > 2678 if (!hugepage_global_enabled()) 2679 error = -EPERM; > 2680 error = hugepage_set_vmflags(&mm->def_flags, MADV_HUGEPAGE); 2681 if (!error) > 2682 process_default_madv_hugepage(mm, MADV_HUGEPAGE); 2683 break; 2684 default: 2685 error = -EINVAL; 2686 break; 2687 } 2688 mmap_write_unlock(mm); 2689 break; 2690 case PR_MPX_ENABLE_MANAGEMENT: 2691 case PR_MPX_DISABLE_MANAGEMENT: 2692 /* No longer implemented: */ 2693 return -EINVAL; 2694 case PR_SET_FP_MODE: 2695 error = SET_FP_MODE(me, arg2); 2696 break; 2697 case PR_GET_FP_MODE: 2698 error = GET_FP_MODE(me); 2699 break; 2700 case PR_SVE_SET_VL: 2701 error = SVE_SET_VL(arg2); 2702 break; 2703 case PR_SVE_GET_VL: 2704 error = SVE_GET_VL(); 2705 break; 2706 case PR_SME_SET_VL: 2707 error = SME_SET_VL(arg2); 2708 break; 2709 case PR_SME_GET_VL: 2710 error = SME_GET_VL(); 2711 break; 2712 case PR_GET_SPECULATION_CTRL: 2713 if (arg3 || arg4 || arg5) 2714 return -EINVAL; 2715 error = arch_prctl_spec_ctrl_get(me, arg2); 2716 break; 2717 case PR_SET_SPECULATION_CTRL: 2718 if (arg4 || arg5) 2719 return -EINVAL; 2720 error = arch_prctl_spec_ctrl_set(me, arg2, arg3); 2721 break; 2722 case PR_PAC_RESET_KEYS: 2723 if (arg3 || arg4 || arg5) 2724 return -EINVAL; 2725 error = PAC_RESET_KEYS(me, arg2); 2726 break; 2727 case PR_PAC_SET_ENABLED_KEYS: 2728 if (arg4 || arg5) 2729 return -EINVAL; 2730 error = PAC_SET_ENABLED_KEYS(me, arg2, arg3); 2731 break; 2732 case PR_PAC_GET_ENABLED_KEYS: 2733 if (arg2 || arg3 || arg4 || arg5) 2734 return -EINVAL; 2735 error = PAC_GET_ENABLED_KEYS(me); 2736 break; 2737 case PR_SET_TAGGED_ADDR_CTRL: 2738 if (arg3 || arg4 || arg5) 2739 return -EINVAL; 2740 error = SET_TAGGED_ADDR_CTRL(arg2); 2741 break; 2742 case PR_GET_TAGGED_ADDR_CTRL: 2743 if (arg2 || arg3 || arg4 || arg5) 2744 return -EINVAL; 2745 error = GET_TAGGED_ADDR_CTRL(); 2746 break; 2747 case PR_SET_IO_FLUSHER: 2748 if (!capable(CAP_SYS_RESOURCE)) 2749 return -EPERM; 2750 2751 if (arg3 || arg4 || arg5) 2752 return -EINVAL; 2753 2754 if (arg2 == 1) 2755 current->flags |= PR_IO_FLUSHER; 2756 else if (!arg2) 2757 current->flags &= ~PR_IO_FLUSHER; 2758 else 2759 return -EINVAL; 2760 break; 2761 case PR_GET_IO_FLUSHER: 2762 if (!capable(CAP_SYS_RESOURCE)) 2763 return -EPERM; 2764 2765 if (arg2 || arg3 || arg4 || arg5) 2766 return -EINVAL; 2767 2768 error = (current->flags & PR_IO_FLUSHER) == PR_IO_FLUSHER; 2769 break; 2770 case PR_SET_SYSCALL_USER_DISPATCH: 2771 error = set_syscall_user_dispatch(arg2, arg3, arg4, 2772 (char __user *) arg5); 2773 break; 2774 #ifdef CONFIG_SCHED_CORE 2775 case PR_SCHED_CORE: 2776 error = sched_core_share_pid(arg2, arg3, arg4, arg5); 2777 break; 2778 #endif 2779 case PR_SET_MDWE: 2780 error = prctl_set_mdwe(arg2, arg3, arg4, arg5); 2781 break; 2782 case PR_GET_MDWE: 2783 error = prctl_get_mdwe(arg2, arg3, arg4, arg5); 2784 break; 2785 case PR_PPC_GET_DEXCR: 2786 if (arg3 || arg4 || arg5) 2787 return -EINVAL; 2788 error = PPC_GET_DEXCR_ASPECT(me, arg2); 2789 break; 2790 case PR_PPC_SET_DEXCR: 2791 if (arg4 || arg5) 2792 return -EINVAL; 2793 error = PPC_SET_DEXCR_ASPECT(me, arg2, arg3); 2794 break; 2795 case PR_SET_VMA: 2796 error = prctl_set_vma(arg2, arg3, arg4, arg5); 2797 break; 2798 case PR_GET_AUXV: 2799 if (arg4 || arg5) 2800 return -EINVAL; 2801 error = prctl_get_auxv((void __user *)arg2, arg3); 2802 break; 2803 #ifdef CONFIG_KSM 2804 case PR_SET_MEMORY_MERGE: 2805 if (arg3 || arg4 || arg5) 2806 return -EINVAL; 2807 if (mmap_write_lock_killable(me->mm)) 2808 return -EINTR; 2809 2810 if (arg2) 2811 error = ksm_enable_merge_any(me->mm); 2812 else 2813 error = ksm_disable_merge_any(me->mm); 2814 mmap_write_unlock(me->mm); 2815 break; 2816 case PR_GET_MEMORY_MERGE: 2817 if (arg2 || arg3 || arg4 || arg5) 2818 return -EINVAL; 2819 2820 error = !!test_bit(MMF_VM_MERGE_ANY, &me->mm->flags); 2821 break; 2822 #endif 2823 case PR_RISCV_V_SET_CONTROL: 2824 error = RISCV_V_SET_CONTROL(arg2); 2825 break; 2826 case PR_RISCV_V_GET_CONTROL: 2827 error = RISCV_V_GET_CONTROL(); 2828 break; 2829 case PR_RISCV_SET_ICACHE_FLUSH_CTX: 2830 error = RISCV_SET_ICACHE_FLUSH_CTX(arg2, arg3); 2831 break; 2832 case PR_GET_SHADOW_STACK_STATUS: 2833 if (arg3 || arg4 || arg5) 2834 return -EINVAL; 2835 error = arch_get_shadow_stack_status(me, (unsigned long __user *) arg2); 2836 break; 2837 case PR_SET_SHADOW_STACK_STATUS: 2838 if (arg3 || arg4 || arg5) 2839 return -EINVAL; 2840 error = arch_set_shadow_stack_status(me, arg2); 2841 break; 2842 case PR_LOCK_SHADOW_STACK_STATUS: 2843 if (arg3 || arg4 || arg5) 2844 return -EINVAL; 2845 error = arch_lock_shadow_stack_status(me, arg2); 2846 break; 2847 case PR_TIMER_CREATE_RESTORE_IDS: 2848 if (arg3 || arg4 || arg5) 2849 return -EINVAL; 2850 error = posixtimer_create_prctl(arg2); 2851 break; 2852 default: 2853 trace_task_prctl_unknown(option, arg2, arg3, arg4, arg5); 2854 error = -EINVAL; 2855 break; 2856 } 2857 return error; 2858 } 2859 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
