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scancount=1 engine=8.12.0-2306200000 definitions=main-2308110158 X-Proofpoint-GUID: ftGctVePsWEga3YNtGX759RU3HwLg3to X-Proofpoint-ORIG-GUID: ftGctVePsWEga3YNtGX759RU3HwLg3to Precedence: bulk List-ID: X-Mailing-List: linux-next@vger.kernel.org The build problem has been reproduced and solved in v27. Specifically the builds that fail are because only PROC_KCORE has been set, which only enables CRASH_CORE by itself. I had to move a few items to obtain the needed visibility. "[PATCH v27 0/8] crash: Kernel handling of CPU and memory hot un/plug" https://lore.kernel.org/lkml/20230811170642.6696-1-eric.devolder@oracle.com/ In addition, I've spot tested/built a few other architectures and do not encounter build errors. Thanks! eric On 8/7/23 23:40, Stephen Rothwell wrote: > Hi all, > > After merging the mm tree, today's linux-next build (powerpc > ppc44x_defconfig) failed like this: > > In file included from kernel/crash_core.c:23: > kernel/kexec_internal.h:11:54: warning: 'struct kexec_segment' declared inside parameter list will not be visible outside of this definition or declaration > 11 | int kimage_load_segment(struct kimage *image, struct kexec_segment *segment); > | ^~~~~~~~~~~~~ > kernel/crash_core.c:321:40: warning: 'struct crash_mem' declared inside parameter list will not be visible outside of this definition or declaration > 321 | int crash_prepare_elf64_headers(struct crash_mem *mem, int need_kernel_map, > | ^~~~~~~~~ > kernel/crash_core.c: In function 'crash_prepare_elf64_headers': > kernel/crash_core.c:334:23: error: invalid use of undefined type 'struct crash_mem' > 334 | nr_phdr += mem->nr_ranges; > | ^~ > In file included from include/vdso/const.h:5, > from include/linux/const.h:4, > from include/linux/bits.h:5, > from include/linux/ratelimit_types.h:5, > from include/linux/printk.h:9, > from include/asm-generic/bug.h:22, > from arch/powerpc/include/asm/bug.h:116, > from include/linux/bug.h:5, > from arch/powerpc/include/asm/cmpxchg.h:8, > from arch/powerpc/include/asm/atomic.h:11, > from include/linux/atomic.h:7, > from include/linux/mm_types_task.h:13, > from include/linux/mm_types.h:5, > from include/linux/buildid.h:5, > from kernel/crash_core.c:7: > kernel/crash_core.c:346:32: error: 'ELF_CORE_HEADER_ALIGN' undeclared (first use in this function) > 346 | elf_sz = ALIGN(elf_sz, ELF_CORE_HEADER_ALIGN); > | ^~~~~~~~~~~~~~~~~~~~~ > include/uapi/linux/const.h:32:50: note: in definition of macro '__ALIGN_KERNEL_MASK' > 32 | #define __ALIGN_KERNEL_MASK(x, mask) (((x) + (mask)) & ~(mask)) > | ^~~~ > include/linux/align.h:8:33: note: in expansion of macro '__ALIGN_KERNEL' > 8 | #define ALIGN(x, a) __ALIGN_KERNEL((x), (a)) > | ^~~~~~~~~~~~~~ > kernel/crash_core.c:346:18: note: in expansion of macro 'ALIGN' > 346 | elf_sz = ALIGN(elf_sz, ELF_CORE_HEADER_ALIGN); > | ^~~~~ > kernel/crash_core.c:346:32: note: each undeclared identifier is reported only once for each function it appears in > 346 | elf_sz = ALIGN(elf_sz, ELF_CORE_HEADER_ALIGN); > | ^~~~~~~~~~~~~~~~~~~~~ > include/uapi/linux/const.h:32:50: note: in definition of macro '__ALIGN_KERNEL_MASK' > 32 | #define __ALIGN_KERNEL_MASK(x, mask) (((x) + (mask)) & ~(mask)) > | ^~~~ > include/linux/align.h:8:33: note: in expansion of macro '__ALIGN_KERNEL' > 8 | #define ALIGN(x, a) __ALIGN_KERNEL((x), (a)) > | ^~~~~~~~~~~~~~ > kernel/crash_core.c:346:18: note: in expansion of macro 'ALIGN' > 346 | elf_sz = ALIGN(elf_sz, ELF_CORE_HEADER_ALIGN); > | ^~~~~ > kernel/crash_core.c:396:28: error: invalid use of undefined type 'struct crash_mem' > 396 | for (i = 0; i < mem->nr_ranges; i++) { > | ^~ > kernel/crash_core.c:397:29: error: invalid use of undefined type 'struct crash_mem' > 397 | mstart = mem->ranges[i].start; > | ^~ > kernel/crash_core.c:398:27: error: invalid use of undefined type 'struct crash_mem' > 398 | mend = mem->ranges[i].end; > | ^~ > kernel/crash_core.c: At top level: > kernel/crash_core.c:420:36: warning: 'struct crash_mem' declared inside parameter list will not be visible outside of this definition or declaration > 420 | int crash_exclude_mem_range(struct crash_mem *mem, > | ^~~~~~~~~ > kernel/crash_core.c: In function 'crash_exclude_mem_range': > kernel/crash_core.c:427:28: error: invalid use of undefined type 'struct crash_mem' > 427 | for (i = 0; i < mem->nr_ranges; i++) { > | ^~ > kernel/crash_core.c:428:28: error: invalid use of undefined type 'struct crash_mem' > 428 | start = mem->ranges[i].start; > | ^~ > kernel/crash_core.c:429:26: error: invalid use of undefined type 'struct crash_mem' > 429 | end = mem->ranges[i].end; > | ^~ > kernel/crash_core.c:444:28: error: invalid use of undefined type 'struct crash_mem' > 444 | mem->ranges[i].start = 0; > | ^~ > kernel/crash_core.c:445:28: error: invalid use of undefined type 'struct crash_mem' > 445 | mem->ranges[i].end = 0; > | ^~ > kernel/crash_core.c:446:36: error: invalid use of undefined type 'struct crash_mem' > 446 | if (i < mem->nr_ranges - 1) { > | ^~ > kernel/crash_core.c:448:52: error: invalid use of undefined type 'struct crash_mem' > 448 | for (j = i; j < mem->nr_ranges - 1; j++) { > | ^~ > kernel/crash_core.c:449:44: error: invalid use of undefined type 'struct crash_mem' > 449 | mem->ranges[j].start = > | ^~ > kernel/crash_core.c:450:52: error: invalid use of undefined type 'struct crash_mem' > 450 | mem->ranges[j+1].start; > | ^~ > kernel/crash_core.c:451:44: error: invalid use of undefined type 'struct crash_mem' > 451 | mem->ranges[j].end = > | ^~ > kernel/crash_core.c:452:60: error: invalid use of undefined type 'struct crash_mem' > 452 | mem->ranges[j+1].end; > | ^~ > kernel/crash_core.c:461:36: error: invalid use of undefined type 'struct crash_mem' > 461 | mem->nr_ranges--; > | ^~ > kernel/crash_core.c:464:28: error: invalid use of undefined type 'struct crash_mem' > 464 | mem->nr_ranges--; > | ^~ > kernel/crash_core.c:470:28: error: invalid use of undefined type 'struct crash_mem' > 470 | mem->ranges[i].end = p_start - 1; > | ^~ > kernel/crash_core.c:474:28: error: invalid use of undefined type 'struct crash_mem' > 474 | mem->ranges[i].end = p_start - 1; > | ^~ > kernel/crash_core.c:476:28: error: invalid use of undefined type 'struct crash_mem' > 476 | mem->ranges[i].start = p_end + 1; > | ^~ > kernel/crash_core.c:485:21: error: invalid use of undefined type 'struct crash_mem' > 485 | if (i == mem->max_nr_ranges - 1) > | ^~ > kernel/crash_core.c:490:20: error: invalid use of undefined type 'struct crash_mem' > 490 | if (j < mem->nr_ranges) { > | ^~ > kernel/crash_core.c:492:29: error: invalid use of undefined type 'struct crash_mem' > 492 | for (i = mem->nr_ranges - 1; i >= j; i--) > | ^~ > kernel/crash_core.c:493:28: error: invalid use of undefined type 'struct crash_mem' > 493 | mem->ranges[i + 1] = mem->ranges[i]; > | ^~ > kernel/crash_core.c:493:49: error: invalid use of undefined type 'struct crash_mem' > 493 | mem->ranges[i + 1] = mem->ranges[i]; > | ^~ > kernel/crash_core.c:496:12: error: invalid use of undefined type 'struct crash_mem' > 496 | mem->ranges[j].start = temp_range.start; > | ^~ > kernel/crash_core.c:497:12: error: invalid use of undefined type 'struct crash_mem' > 497 | mem->ranges[j].end = temp_range.end; > | ^~ > kernel/crash_core.c:498:12: error: invalid use of undefined type 'struct crash_mem' > 498 | mem->nr_ranges++; > | ^~ > > I am not sure exactly which commit caused but I have revreted these > for today: > > 6a41fd4665e6 ("x86/crash: optimize CPU changes") > add3b7e011e9 ("crash: change crash_prepare_elf64_headers() to for_each_possible_cpu()") > 4a7eed40a7bc ("crash: hotplug support for kexec_load()") > 8ce41bc6b147 ("x86/crash: add x86 crash hotplug support") > 2b765af0c14f ("crash: memory and CPU hotplug sysfs attributes") > 36d2b573329b ("kexec: exclude elfcorehdr from the segment digest") > ccfe0040500f ("crash: add generic infrastructure for crash hotplug support") > 626775922a57 ("crash: move a few code bits to setup support of crash hotplug") >