kernel/trace/trace.c:10775:undefined reference to `get_vm_area'

From: kernel test robot
Date: Mon Apr 07 2025 - 18:12:57 EST

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 0af2f6be1b4281385b618cb86ad946eded089ac8
commit: 394f3f02de5311ea976dd8046304194d22329bbc tracing: Use vmap_page_range() to map memmap ring buffer
date: 5 days ago
config: sh-randconfig-001-20250408 (https://download.01.org/0day-ci/archive/20250408/202504080619.xvDhvxPf-lkp@xxxxxxxxx/config)
compiler: sh4-linux-gcc (GCC) 13.3.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250408/202504080619.xvDhvxPf-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/202504080619.xvDhvxPf-lkp@xxxxxxxxx/

All errors (new ones prefixed by >>):

sh4-linux-ld: kernel/trace/trace.o: in function `enable_instances':
>> kernel/trace/trace.c:10775:(.init.text+0x9f8): undefined reference to `get_vm_area'


vim +10775 kernel/trace/trace.c

9c1c251d670bc1 Steven Rostedt (Google 2023-02-07 10695)
cb1f98c5e57422 Steven Rostedt (Google 2023-02-07 10696) __init static void enable_instances(void)
cb1f98c5e57422 Steven Rostedt (Google 2023-02-07 10697) {
cb1f98c5e57422 Steven Rostedt (Google 2023-02-07 10698) struct trace_array *tr;
34ea8fa084dd96 Steven Rostedt 2025-04-02 10699 bool memmap_area = false;
cb1f98c5e57422 Steven Rostedt (Google 2023-02-07 10700) char *curr_str;
e645535a954ad5 Steven Rostedt (Google 2024-06-12 10701) char *name;
cb1f98c5e57422 Steven Rostedt (Google 2023-02-07 10702) char *str;
cb1f98c5e57422 Steven Rostedt (Google 2023-02-07 10703) char *tok;
cb1f98c5e57422 Steven Rostedt (Google 2023-02-07 10704)
cb1f98c5e57422 Steven Rostedt (Google 2023-02-07 10705) /* A tab is always appended */
cb1f98c5e57422 Steven Rostedt (Google 2023-02-07 10706) boot_instance_info[boot_instance_index - 1] = '\0';
cb1f98c5e57422 Steven Rostedt (Google 2023-02-07 10707) str = boot_instance_info;
cb1f98c5e57422 Steven Rostedt (Google 2023-02-07 10708)
cb1f98c5e57422 Steven Rostedt (Google 2023-02-07 10709) while ((curr_str = strsep(&str, "\t"))) {
29a02ec66556ac Steven Rostedt (Google 2024-08-15 10710) phys_addr_t start = 0;
29a02ec66556ac Steven Rostedt (Google 2024-08-15 10711) phys_addr_t size = 0;
e645535a954ad5 Steven Rostedt (Google 2024-06-12 10712) unsigned long addr = 0;
ddb8ea9e5ae482 Steven Rostedt 2024-08-22 10713 bool traceprintk = false;
b6fc31b68731af Steven Rostedt 2024-08-22 10714 bool traceoff = false;
b6fc31b68731af Steven Rostedt 2024-08-22 10715 char *flag_delim;
b6fc31b68731af Steven Rostedt 2024-08-22 10716 char *addr_delim;
fb6d03238e35f9 Masami Hiramatsu (Google 2025-02-19 10717) char *rname __free(kfree) = NULL;
cb1f98c5e57422 Steven Rostedt (Google 2023-02-07 10718)
cb1f98c5e57422 Steven Rostedt (Google 2023-02-07 10719) tok = strsep(&curr_str, ",");
cb1f98c5e57422 Steven Rostedt (Google 2023-02-07 10720)
b6fc31b68731af Steven Rostedt 2024-08-22 10721 flag_delim = strchr(tok, '^');
b6fc31b68731af Steven Rostedt 2024-08-22 10722 addr_delim = strchr(tok, '@');
b6fc31b68731af Steven Rostedt 2024-08-22 10723
b6fc31b68731af Steven Rostedt 2024-08-22 10724 if (addr_delim)
b6fc31b68731af Steven Rostedt 2024-08-22 10725 *addr_delim++ = '\0';
b6fc31b68731af Steven Rostedt 2024-08-22 10726
b6fc31b68731af Steven Rostedt 2024-08-22 10727 if (flag_delim)
b6fc31b68731af Steven Rostedt 2024-08-22 10728 *flag_delim++ = '\0';
b6fc31b68731af Steven Rostedt 2024-08-22 10729
b6fc31b68731af Steven Rostedt 2024-08-22 10730 name = tok;
b6fc31b68731af Steven Rostedt 2024-08-22 10731
b6fc31b68731af Steven Rostedt 2024-08-22 10732 if (flag_delim) {
b6fc31b68731af Steven Rostedt 2024-08-22 10733 char *flag;
b6fc31b68731af Steven Rostedt 2024-08-22 10734
b6fc31b68731af Steven Rostedt 2024-08-22 10735 while ((flag = strsep(&flag_delim, "^"))) {
ddb8ea9e5ae482 Steven Rostedt 2024-08-22 10736 if (strcmp(flag, "traceoff") == 0) {
b6fc31b68731af Steven Rostedt 2024-08-22 10737 traceoff = true;
ddb8ea9e5ae482 Steven Rostedt 2024-08-22 10738 } else if ((strcmp(flag, "printk") == 0) ||
ddb8ea9e5ae482 Steven Rostedt 2024-08-22 10739 (strcmp(flag, "traceprintk") == 0) ||
ddb8ea9e5ae482 Steven Rostedt 2024-08-22 10740 (strcmp(flag, "trace_printk") == 0)) {
ddb8ea9e5ae482 Steven Rostedt 2024-08-22 10741 traceprintk = true;
ddb8ea9e5ae482 Steven Rostedt 2024-08-22 10742 } else {
b6fc31b68731af Steven Rostedt 2024-08-22 10743 pr_info("Tracing: Invalid instance flag '%s' for %s\n",
b6fc31b68731af Steven Rostedt 2024-08-22 10744 flag, name);
b6fc31b68731af Steven Rostedt 2024-08-22 10745 }
b6fc31b68731af Steven Rostedt 2024-08-22 10746 }
ddb8ea9e5ae482 Steven Rostedt 2024-08-22 10747 }
b6fc31b68731af Steven Rostedt 2024-08-22 10748
b6fc31b68731af Steven Rostedt 2024-08-22 10749 tok = addr_delim;
29a02ec66556ac Steven Rostedt (Google 2024-08-15 10750) if (tok && isdigit(*tok)) {
e645535a954ad5 Steven Rostedt (Google 2024-06-12 10751) start = memparse(tok, &tok);
e645535a954ad5 Steven Rostedt (Google 2024-06-12 10752) if (!start) {
e645535a954ad5 Steven Rostedt (Google 2024-06-12 10753) pr_warn("Tracing: Invalid boot instance address for %s\n",
e645535a954ad5 Steven Rostedt (Google 2024-06-12 10754) name);
e645535a954ad5 Steven Rostedt (Google 2024-06-12 10755) continue;
e645535a954ad5 Steven Rostedt (Google 2024-06-12 10756) }
e645535a954ad5 Steven Rostedt (Google 2024-06-12 10757) if (*tok != ':') {
e645535a954ad5 Steven Rostedt (Google 2024-06-12 10758) pr_warn("Tracing: No size specified for instance %s\n", name);
e645535a954ad5 Steven Rostedt (Google 2024-06-12 10759) continue;
e645535a954ad5 Steven Rostedt (Google 2024-06-12 10760) }
e645535a954ad5 Steven Rostedt (Google 2024-06-12 10761) tok++;
e645535a954ad5 Steven Rostedt (Google 2024-06-12 10762) size = memparse(tok, &tok);
e645535a954ad5 Steven Rostedt (Google 2024-06-12 10763) if (!size) {
e645535a954ad5 Steven Rostedt (Google 2024-06-12 10764) pr_warn("Tracing: Invalid boot instance size for %s\n",
e645535a954ad5 Steven Rostedt (Google 2024-06-12 10765) name);
e645535a954ad5 Steven Rostedt (Google 2024-06-12 10766) continue;
e645535a954ad5 Steven Rostedt (Google 2024-06-12 10767) }
34ea8fa084dd96 Steven Rostedt 2025-04-02 10768 memmap_area = true;
29a02ec66556ac Steven Rostedt (Google 2024-08-15 10769) } else if (tok) {
29a02ec66556ac Steven Rostedt (Google 2024-08-15 10770) if (!reserve_mem_find_by_name(tok, &start, &size)) {
29a02ec66556ac Steven Rostedt (Google 2024-08-15 10771) start = 0;
29a02ec66556ac Steven Rostedt (Google 2024-08-15 10772) pr_warn("Failed to map boot instance %s to %s\n", name, tok);
29a02ec66556ac Steven Rostedt (Google 2024-08-15 10773) continue;
29a02ec66556ac Steven Rostedt (Google 2024-08-15 10774) }
fb6d03238e35f9 Masami Hiramatsu (Google 2025-02-19 @10775) rname = kstrdup(tok, GFP_KERNEL);
29a02ec66556ac Steven Rostedt (Google 2024-08-15 10776) }
29a02ec66556ac Steven Rostedt (Google 2024-08-15 10777)
29a02ec66556ac Steven Rostedt (Google 2024-08-15 10778) if (start) {
c44a14f216f45d Steven Rostedt 2025-04-02 10779 /* Start and size must be page aligned */
c44a14f216f45d Steven Rostedt 2025-04-02 10780 if (start & ~PAGE_MASK) {
c44a14f216f45d Steven Rostedt 2025-04-02 10781 pr_warn("Tracing: mapping start addr %pa is not page aligned\n", &start);
c44a14f216f45d Steven Rostedt 2025-04-02 10782 continue;
c44a14f216f45d Steven Rostedt 2025-04-02 10783 }
c44a14f216f45d Steven Rostedt 2025-04-02 10784 if (size & ~PAGE_MASK) {
c44a14f216f45d Steven Rostedt 2025-04-02 10785 pr_warn("Tracing: mapping size %pa is not page aligned\n", &size);
c44a14f216f45d Steven Rostedt 2025-04-02 10786 continue;
c44a14f216f45d Steven Rostedt 2025-04-02 10787 }
c44a14f216f45d Steven Rostedt 2025-04-02 10788
34ea8fa084dd96 Steven Rostedt 2025-04-02 10789 if (memmap_area)
e645535a954ad5 Steven Rostedt (Google 2024-06-12 10790) addr = map_pages(start, size);
34ea8fa084dd96 Steven Rostedt 2025-04-02 10791 else
34ea8fa084dd96 Steven Rostedt 2025-04-02 10792 addr = (unsigned long)phys_to_virt(start);
e645535a954ad5 Steven Rostedt (Google 2024-06-12 10793) if (addr) {
29a02ec66556ac Steven Rostedt (Google 2024-08-15 10794) pr_info("Tracing: mapped boot instance %s at physical memory %pa of size 0x%lx\n",
29a02ec66556ac Steven Rostedt (Google 2024-08-15 10795) name, &start, (unsigned long)size);
e645535a954ad5 Steven Rostedt (Google 2024-06-12 10796) } else {
e645535a954ad5 Steven Rostedt (Google 2024-06-12 10797) pr_warn("Tracing: Failed to map boot instance %s\n", name);
e645535a954ad5 Steven Rostedt (Google 2024-06-12 10798) continue;
e645535a954ad5 Steven Rostedt (Google 2024-06-12 10799) }
e645535a954ad5 Steven Rostedt (Google 2024-06-12 10800) } else {
e645535a954ad5 Steven Rostedt (Google 2024-06-12 10801) /* Only non mapped buffers have snapshot buffers */
9c1c251d670bc1 Steven Rostedt (Google 2023-02-07 10802) if (IS_ENABLED(CONFIG_TRACER_MAX_TRACE))
e645535a954ad5 Steven Rostedt (Google 2024-06-12 10803) do_allocate_snapshot(name);
e645535a954ad5 Steven Rostedt (Google 2024-06-12 10804) }
9c1c251d670bc1 Steven Rostedt (Google 2023-02-07 10805)
e645535a954ad5 Steven Rostedt (Google 2024-06-12 10806) tr = trace_array_create_systems(name, NULL, addr, size);
94dfa500e7dedd Dan Carpenter 2024-06-20 10807 if (IS_ERR(tr)) {
e645535a954ad5 Steven Rostedt (Google 2024-06-12 10808) pr_warn("Tracing: Failed to create instance buffer %s\n", curr_str);
cb1f98c5e57422 Steven Rostedt (Google 2023-02-07 10809) continue;
cb1f98c5e57422 Steven Rostedt (Google 2023-02-07 10810) }
e645535a954ad5 Steven Rostedt (Google 2024-06-12 10811)
b6fc31b68731af Steven Rostedt 2024-08-22 10812 if (traceoff)
b6fc31b68731af Steven Rostedt 2024-08-22 10813 tracer_tracing_off(tr);
b6fc31b68731af Steven Rostedt 2024-08-22 10814
9b7bdf6f6ece6e Steven Rostedt 2024-08-22 10815 if (traceprintk)
ef2bd81d0c9561 Steven Rostedt 2024-08-22 10816 update_printk_trace(tr);
9b7bdf6f6ece6e Steven Rostedt 2024-08-22 10817
ddb8ea9e5ae482 Steven Rostedt 2024-08-22 10818 /*
34ea8fa084dd96 Steven Rostedt 2025-04-02 10819 * memmap'd buffers can not be freed.
ddb8ea9e5ae482 Steven Rostedt 2024-08-22 10820 */
34ea8fa084dd96 Steven Rostedt 2025-04-02 10821 if (memmap_area) {
34ea8fa084dd96 Steven Rostedt 2025-04-02 10822 tr->flags |= TRACE_ARRAY_FL_MEMMAP;
34ea8fa084dd96 Steven Rostedt 2025-04-02 10823 tr->ref++;
34ea8fa084dd96 Steven Rostedt 2025-04-02 10824 }
34ea8fa084dd96 Steven Rostedt 2025-04-02 10825
2cf9733891a460 Steven Rostedt 2024-10-11 10826 if (start) {
bcba8d4dbe6880 Steven Rostedt 2025-03-05 10827 tr->flags |= TRACE_ARRAY_FL_BOOT | TRACE_ARRAY_FL_LAST_BOOT;
fb6d03238e35f9 Masami Hiramatsu (Google 2025-02-19 10828) tr->range_name = no_free_ptr(rname);
2cf9733891a460 Steven Rostedt 2024-10-11 10829 }
c4846480831ea5 Steven Rostedt (Google 2023-02-07 10830)
c4846480831ea5 Steven Rostedt (Google 2023-02-07 10831) while ((tok = strsep(&curr_str, ","))) {
c4846480831ea5 Steven Rostedt (Google 2023-02-07 10832) early_enable_events(tr, tok, true);
c4846480831ea5 Steven Rostedt (Google 2023-02-07 10833) }
cb1f98c5e57422 Steven Rostedt (Google 2023-02-07 10834) }
cb1f98c5e57422 Steven Rostedt (Google 2023-02-07 10835) }
cb1f98c5e57422 Steven Rostedt (Google 2023-02-07 10836)

:::::: The code at line 10775 was first introduced by commit
:::::: fb6d03238e35f96cc1d6a5411ee1d684221d1c39 tracing: Freeable reserved ring buffer

:::::: TO: Masami Hiramatsu (Google) <mhiramat@xxxxxxxxxx>
:::::: CC: Steven Rostedt (Google) <rostedt@xxxxxxxxxxx>

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