[linux-next:master 3136/3150] init/main.c:925:2: error: implicit declaration of function 'init_vmlinux_build_id'

[linux-next:master 3136/3150] init/main.c:925:2: error: implicit declaration of function 'init_vmlinux_build_id'

[kernel test robot]

[-- Attachment #1: Type: text/plain, Size: 6857 bytes --]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   cd557f1c605fc5a2c0eb0b540610f50dc67dd849
commit: 9bbb6ec7e7a5cbc59222379498d5a3b8ac21080a [3136/3150] buildid: stash away kernels build ID on init
config: x86_64-randconfig-a005-20210514 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=9bbb6ec7e7a5cbc59222379498d5a3b8ac21080a
        git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
        git fetch --no-tags linux-next master
        git checkout 9bbb6ec7e7a5cbc59222379498d5a3b8ac21080a
        # save the attached .config to linux build tree
        make W=1 W=1 ARCH=x86_64 

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

Note: the linux-next/master HEAD cd557f1c605fc5a2c0eb0b540610f50dc67dd849 builds fine.
      It may have been fixed somewhere.

All errors (new ones prefixed by >>):

   init/main.c: In function 'start_kernel':
>> init/main.c:925:2: error: implicit declaration of function 'init_vmlinux_build_id' [-Werror=implicit-function-declaration]
     925 |  init_vmlinux_build_id();
         |  ^~~~~~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors


vim +/init_vmlinux_build_id +925 init/main.c

   916	
   917	asmlinkage __visible void __init __no_sanitize_address start_kernel(void)
   918	{
   919		char *command_line;
   920		char *after_dashes;
   921	
   922		set_task_stack_end_magic(&init_task);
   923		smp_setup_processor_id();
   924		debug_objects_early_init();
 > 925		init_vmlinux_build_id();
   926	
   927		cgroup_init_early();
   928	
   929		local_irq_disable();
   930		early_boot_irqs_disabled = true;
   931	
   932		/*
   933		 * Interrupts are still disabled. Do necessary setups, then
   934		 * enable them.
   935		 */
   936		boot_cpu_init();
   937		page_address_init();
   938		pr_notice("%s", linux_banner);
   939		early_security_init();
   940		setup_arch(&command_line);
   941		setup_boot_config();
   942		setup_command_line(command_line);
   943		setup_nr_cpu_ids();
   944		setup_per_cpu_areas();
   945		smp_prepare_boot_cpu();	/* arch-specific boot-cpu hooks */
   946		boot_cpu_hotplug_init();
   947	
   948		build_all_zonelists(NULL);
   949		page_alloc_init();
   950	
   951		pr_notice("Kernel command line: %s\n", saved_command_line);
   952		/* parameters may set static keys */
   953		jump_label_init();
   954		parse_early_param();
   955		after_dashes = parse_args("Booting kernel",
   956					  static_command_line, __start___param,
   957					  __stop___param - __start___param,
   958					  -1, -1, NULL, &unknown_bootoption);
   959		print_unknown_bootoptions();
   960		if (!IS_ERR_OR_NULL(after_dashes))
   961			parse_args("Setting init args", after_dashes, NULL, 0, -1, -1,
   962				   NULL, set_init_arg);
   963		if (extra_init_args)
   964			parse_args("Setting extra init args", extra_init_args,
   965				   NULL, 0, -1, -1, NULL, set_init_arg);
   966	
   967		/*
   968		 * These use large bootmem allocations and must precede
   969		 * kmem_cache_init()
   970		 */
   971		setup_log_buf(0);
   972		vfs_caches_init_early();
   973		sort_main_extable();
   974		trap_init();
   975		mm_init();
   976	
   977		ftrace_init();
   978	
   979		/* trace_printk can be enabled here */
   980		early_trace_init();
   981	
   982		/*
   983		 * Set up the scheduler prior starting any interrupts (such as the
   984		 * timer interrupt). Full topology setup happens at smp_init()
   985		 * time - but meanwhile we still have a functioning scheduler.
   986		 */
   987		sched_init();
   988	
   989		if (WARN(!irqs_disabled(),
   990			 "Interrupts were enabled *very* early, fixing it\n"))
   991			local_irq_disable();
   992		radix_tree_init();
   993	
   994		/*
   995		 * Set up housekeeping before setting up workqueues to allow the unbound
   996		 * workqueue to take non-housekeeping into account.
   997		 */
   998		housekeeping_init();
   999	
  1000		/*
  1001		 * Allow workqueue creation and work item queueing/cancelling
  1002		 * early.  Work item execution depends on kthreads and starts after
  1003		 * workqueue_init().
  1004		 */
  1005		workqueue_init_early();
  1006	
  1007		rcu_init();
  1008	
  1009		/* Trace events are available after this */
  1010		trace_init();
  1011	
  1012		if (initcall_debug)
  1013			initcall_debug_enable();
  1014	
  1015		context_tracking_init();
  1016		/* init some links before init_ISA_irqs() */
  1017		early_irq_init();
  1018		init_IRQ();
  1019		tick_init();
  1020		rcu_init_nohz();
  1021		init_timers();
  1022		srcu_init();
  1023		hrtimers_init();
  1024		softirq_init();
  1025		timekeeping_init();
  1026		kfence_init();
  1027	
  1028		/*
  1029		 * For best initial stack canary entropy, prepare it after:
  1030		 * - setup_arch() for any UEFI RNG entropy and boot cmdline access
  1031		 * - timekeeping_init() for ktime entropy used in rand_initialize()
  1032		 * - rand_initialize() to get any arch-specific entropy like RDRAND
  1033		 * - add_latent_entropy() to get any latent entropy
  1034		 * - adding command line entropy
  1035		 */
  1036		rand_initialize();
  1037		add_latent_entropy();
  1038		add_device_randomness(command_line, strlen(command_line));
  1039		boot_init_stack_canary();
  1040	
  1041		time_init();
  1042		perf_event_init();
  1043		profile_init();
  1044		call_function_init();
  1045		WARN(!irqs_disabled(), "Interrupts were enabled early\n");
  1046	
  1047		early_boot_irqs_disabled = false;
  1048		local_irq_enable();
  1049	
  1050		kmem_cache_init_late();
  1051	
  1052		/*
  1053		 * HACK ALERT! This is early. We're enabling the console before
  1054		 * we've done PCI setups etc, and console_init() must be aware of
  1055		 * this. But we do want output early, in case something goes wrong.
  1056		 */
  1057		console_init();
  1058		if (panic_later)
  1059			panic("Too many boot %s vars at `%s'", panic_later,
  1060			      panic_param);
  1061	
  1062		lockdep_init();
  1063	
  1064		/*
  1065		 * Need to run this when irqs are enabled, because it wants
  1066		 * to self-test [hard/soft]-irqs on/off lock inversion bugs
  1067		 * too:
  1068		 */
  1069		locking_selftest();
  1070	
  1071		/*
  1072		 * This needs to be called before any devices perform DMA
  1073		 * operations that might use the SWIOTLB bounce buffers. It will
  1074		 * mark the bounce buffers as decrypted so that their usage will
  1075		 * not cause "plain-text" data to be decrypted when accessed.
  1076		 */
  1077		mem_encrypt_init();
  1078	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 33682 bytes --]

Re: [linux-next:master 3136/3150] init/main.c:925:2: error: implicit declaration of function 'init_vmlinux_build_id'

[Stephen Boyd]

Quoting kernel test robot (2021-05-15 13:25:22)
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
> head:   cd557f1c605fc5a2c0eb0b540610f50dc67dd849
> commit: 9bbb6ec7e7a5cbc59222379498d5a3b8ac21080a [3136/3150] buildid: stash away kernels build ID on init
> config: x86_64-randconfig-a005-20210514 (attached as .config)
> compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
> reproduce (this is a W=1 build):
>         # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=9bbb6ec7e7a5cbc59222379498d5a3b8ac21080a
>         git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
>         git fetch --no-tags linux-next master
>         git checkout 9bbb6ec7e7a5cbc59222379498d5a3b8ac21080a
>         # save the attached .config to linux build tree
>         make W=1 W=1 ARCH=x86_64
>
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@intel.com>
>
> Note: the linux-next/master HEAD cd557f1c605fc5a2c0eb0b540610f50dc67dd849 builds fine.
>       It may have been fixed somewhere.
>
> All errors (new ones prefixed by >>):
>
>    init/main.c: In function 'start_kernel':
> >> init/main.c:925:2: error: implicit declaration of function 'init_vmlinux_build_id' [-Werror=implicit-function-declaration]
>      925 |  init_vmlinux_build_id();
>          |  ^~~~~~~~~~~~~~~~~~~~~
>    cc1: some warnings being treated as errors

Thanks. This patch should fix it. Andrew, can it be squashed in?

diff --git a/init/main.c b/init/main.c
index eaede2f41327..38982b688431 100644
--- a/init/main.c
+++ b/init/main.c
@@ -44,6 +44,7 @@
 #include <linux/rcupdate.h>
 #include <linux/moduleparam.h>
 #include <linux/kallsyms.h>
+#include <linux/buildid.h>
 #include <linux/writeback.h>
 #include <linux/cpu.h>
 #include <linux/cpuset.h>