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Date: Fri, 14 Jan 2022 06:13:37 +0800
From: kernel test robot <lkp@...el.com>
To: Peter Zijlstra <peterz@...radead.org>
Cc: kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
Catalin Marinas <catalin.marinas@....com>,
Mark Rutland <mark.rutland@....com>
Subject: arch/powerpc/kernel/stacktrace.c:171:9: error: implicit declaration
of function 'nmi_cpu_backtrace'
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: fb3b0673b7d5b477ed104949450cd511337ba3c6
commit: 1614b2b11fab29dd4ff31ebba9d266961f5af69e arch: Make ARCH_STACKWALK independent of STACKTRACE
date: 5 weeks ago
config: powerpc64-randconfig-r025-20220113 (https://download.01.org/0day-ci/archive/20220114/202201140631.ZuSwa9QF-lkp@intel.com/config)
compiler: powerpc64-linux-gcc (GCC) 11.2.0
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1614b2b11fab29dd4ff31ebba9d266961f5af69e
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 1614b2b11fab29dd4ff31ebba9d266961f5af69e
# save the config file to linux build tree
mkdir build_dir
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=powerpc SHELL=/bin/bash
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>
All errors (new ones prefixed by >>):
arch/powerpc/kernel/stacktrace.c: In function 'handle_backtrace_ipi':
>> arch/powerpc/kernel/stacktrace.c:171:9: error: implicit declaration of function 'nmi_cpu_backtrace' [-Werror=implicit-function-declaration]
171 | nmi_cpu_backtrace(regs);
| ^~~~~~~~~~~~~~~~~
arch/powerpc/kernel/stacktrace.c: At top level:
arch/powerpc/kernel/stacktrace.c:224:6: warning: no previous prototype for 'arch_trigger_cpumask_backtrace' [-Wmissing-prototypes]
224 | void arch_trigger_cpumask_backtrace(const cpumask_t *mask, bool exclude_self)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/kernel/stacktrace.c: In function 'arch_trigger_cpumask_backtrace':
>> arch/powerpc/kernel/stacktrace.c:226:9: error: implicit declaration of function 'nmi_trigger_cpumask_backtrace'; did you mean 'arch_trigger_cpumask_backtrace'? [-Werror=implicit-function-declaration]
226 | nmi_trigger_cpumask_backtrace(mask, exclude_self, raise_backtrace_ipi);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| arch_trigger_cpumask_backtrace
cc1: some warnings being treated as errors
vim +/nmi_cpu_backtrace +171 arch/powerpc/kernel/stacktrace.c
018cce33c5e62d Christophe Leroy 2019-01-31 167
e08ecba17b72ae Michael Ellerman 2018-06-19 168 #if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_NMI_IPI)
5cc05910f26e6f Michael Ellerman 2018-05-02 169 static void handle_backtrace_ipi(struct pt_regs *regs)
5cc05910f26e6f Michael Ellerman 2018-05-02 170 {
5cc05910f26e6f Michael Ellerman 2018-05-02 @171 nmi_cpu_backtrace(regs);
5cc05910f26e6f Michael Ellerman 2018-05-02 172 }
5cc05910f26e6f Michael Ellerman 2018-05-02 173
5cc05910f26e6f Michael Ellerman 2018-05-02 174 static void raise_backtrace_ipi(cpumask_t *mask)
5cc05910f26e6f Michael Ellerman 2018-05-02 175 {
7c6986ade69e3c Michael Ellerman 2021-06-25 176 struct paca_struct *p;
5cc05910f26e6f Michael Ellerman 2018-05-02 177 unsigned int cpu;
7c6986ade69e3c Michael Ellerman 2021-06-25 178 u64 delay_us;
5cc05910f26e6f Michael Ellerman 2018-05-02 179
5cc05910f26e6f Michael Ellerman 2018-05-02 180 for_each_cpu(cpu, mask) {
7c6986ade69e3c Michael Ellerman 2021-06-25 181 if (cpu == smp_processor_id()) {
5cc05910f26e6f Michael Ellerman 2018-05-02 182 handle_backtrace_ipi(NULL);
7c6986ade69e3c Michael Ellerman 2021-06-25 183 continue;
5cc05910f26e6f Michael Ellerman 2018-05-02 184 }
5cc05910f26e6f Michael Ellerman 2018-05-02 185
7c6986ade69e3c Michael Ellerman 2021-06-25 186 delay_us = 5 * USEC_PER_SEC;
7c6986ade69e3c Michael Ellerman 2021-06-25 187
7c6986ade69e3c Michael Ellerman 2021-06-25 188 if (smp_send_safe_nmi_ipi(cpu, handle_backtrace_ipi, delay_us)) {
7c6986ade69e3c Michael Ellerman 2021-06-25 189 // Now wait up to 5s for the other CPU to do its backtrace
7c6986ade69e3c Michael Ellerman 2021-06-25 190 while (cpumask_test_cpu(cpu, mask) && delay_us) {
7c6986ade69e3c Michael Ellerman 2021-06-25 191 udelay(1);
7c6986ade69e3c Michael Ellerman 2021-06-25 192 delay_us--;
7c6986ade69e3c Michael Ellerman 2021-06-25 193 }
7c6986ade69e3c Michael Ellerman 2021-06-25 194
7c6986ade69e3c Michael Ellerman 2021-06-25 195 // Other CPU cleared itself from the mask
7c6986ade69e3c Michael Ellerman 2021-06-25 196 if (delay_us)
7c6986ade69e3c Michael Ellerman 2021-06-25 197 continue;
7c6986ade69e3c Michael Ellerman 2021-06-25 198 }
7c6986ade69e3c Michael Ellerman 2021-06-25 199
7c6986ade69e3c Michael Ellerman 2021-06-25 200 p = paca_ptrs[cpu];
5cc05910f26e6f Michael Ellerman 2018-05-02 201
5cc05910f26e6f Michael Ellerman 2018-05-02 202 cpumask_clear_cpu(cpu, mask);
5cc05910f26e6f Michael Ellerman 2018-05-02 203
5cc05910f26e6f Michael Ellerman 2018-05-02 204 pr_warn("CPU %d didn't respond to backtrace IPI, inspecting paca.\n", cpu);
5cc05910f26e6f Michael Ellerman 2018-05-02 205 if (!virt_addr_valid(p)) {
5cc05910f26e6f Michael Ellerman 2018-05-02 206 pr_warn("paca pointer appears corrupt? (%px)\n", p);
5cc05910f26e6f Michael Ellerman 2018-05-02 207 continue;
5cc05910f26e6f Michael Ellerman 2018-05-02 208 }
5cc05910f26e6f Michael Ellerman 2018-05-02 209
5cc05910f26e6f Michael Ellerman 2018-05-02 210 pr_warn("irq_soft_mask: 0x%02x in_mce: %d in_nmi: %d",
5cc05910f26e6f Michael Ellerman 2018-05-02 211 p->irq_soft_mask, p->in_mce, p->in_nmi);
5cc05910f26e6f Michael Ellerman 2018-05-02 212
5cc05910f26e6f Michael Ellerman 2018-05-02 213 if (virt_addr_valid(p->__current))
5cc05910f26e6f Michael Ellerman 2018-05-02 214 pr_cont(" current: %d (%s)\n", p->__current->pid,
5cc05910f26e6f Michael Ellerman 2018-05-02 215 p->__current->comm);
5cc05910f26e6f Michael Ellerman 2018-05-02 216 else
5cc05910f26e6f Michael Ellerman 2018-05-02 217 pr_cont(" current pointer corrupt? (%px)\n", p->__current);
5cc05910f26e6f Michael Ellerman 2018-05-02 218
5cc05910f26e6f Michael Ellerman 2018-05-02 219 pr_warn("Back trace of paca->saved_r1 (0x%016llx) (possibly stale):\n", p->saved_r1);
9cb8f069deeed7 Dmitry Safonov 2020-06-08 220 show_stack(p->__current, (unsigned long *)p->saved_r1, KERN_WARNING);
5cc05910f26e6f Michael Ellerman 2018-05-02 221 }
5cc05910f26e6f Michael Ellerman 2018-05-02 222 }
5cc05910f26e6f Michael Ellerman 2018-05-02 223
5cc05910f26e6f Michael Ellerman 2018-05-02 224 void arch_trigger_cpumask_backtrace(const cpumask_t *mask, bool exclude_self)
5cc05910f26e6f Michael Ellerman 2018-05-02 225 {
5cc05910f26e6f Michael Ellerman 2018-05-02 @226 nmi_trigger_cpumask_backtrace(mask, exclude_self, raise_backtrace_ipi);
:::::: The code at line 171 was first introduced by commit
:::::: 5cc05910f26e6fd6da15f052f86f6150e4b91664 powerpc/64s: Wire up arch_trigger_cpumask_backtrace()
:::::: TO: Michael Ellerman <mpe@...erman.id.au>
:::::: CC: Michael Ellerman <mpe@...erman.id.au>
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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