[peterz-queue:sched/wchan 7/7] arch/nds32/kernel/stacktrace.c:13:13: error: 'savesched' redeclared as different kind of symbol

From: kernel test robot
Date: Thu Oct 07 2021 - 04:16:40 EST

tree: https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git sched/wchan
head: 48f17ab32afc56a67359efc5b8889cb8cb42ec80
commit: 48f17ab32afc56a67359efc5b8889cb8cb42ec80 [7/7] arch: Fix STACKTRACE_SUPPORT
config: nds32-defconfig (attached as .config)
compiler: nds32le-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/peterz/queue.git/commit/?id=48f17ab32afc56a67359efc5b8889cb8cb42ec80
git remote add peterz-queue https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git
git fetch --no-tags peterz-queue sched/wchan
git checkout 48f17ab32afc56a67359efc5b8889cb8cb42ec80
# save the attached .config to linux build tree
mkdir build_dir
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=nds32 SHELL=/bin/bash

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

All errors (new ones prefixed by >>):

arch/nds32/kernel/stacktrace.c: In function '__save_stack_trace_tsk':
>> arch/nds32/kernel/stacktrace.c:13:13: error: 'savesched' redeclared as different kind of symbol
13 | int savesched;
| ^~~~~~~~~
arch/nds32/kernel/stacktrace.c:9:93: note: previous definition of 'savesched' with type 'bool' {aka '_Bool'}
9 | static void __save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace, bool savesched)
| ~~~~~^~~~~~~~~


vim +/savesched +13 arch/nds32/kernel/stacktrace.c

2923f5ea7738cb9 Greentime Hu 2017-10-24 8
48f17ab32afc56a Peter Zijlstra 2021-09-30 9 static void __save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace, bool savesched)
2923f5ea7738cb9 Greentime Hu 2017-10-24 10 {
2923f5ea7738cb9 Greentime Hu 2017-10-24 11 unsigned long *fpn;
2923f5ea7738cb9 Greentime Hu 2017-10-24 12 int skip = trace->skip;
2923f5ea7738cb9 Greentime Hu 2017-10-24 @13 int savesched;
1e377ae9b04aef4 Zong Li 2018-08-15 14 int graph_idx = 0;
2923f5ea7738cb9 Greentime Hu 2017-10-24 15
2923f5ea7738cb9 Greentime Hu 2017-10-24 16 if (tsk == current) {
2923f5ea7738cb9 Greentime Hu 2017-10-24 17 __asm__ __volatile__("\tori\t%0, $fp, #0\n":"=r"(fpn));
2923f5ea7738cb9 Greentime Hu 2017-10-24 18 } else {
2923f5ea7738cb9 Greentime Hu 2017-10-24 19 fpn = (unsigned long *)thread_saved_fp(tsk);
2923f5ea7738cb9 Greentime Hu 2017-10-24 20 }
2923f5ea7738cb9 Greentime Hu 2017-10-24 21
2923f5ea7738cb9 Greentime Hu 2017-10-24 22 while (!kstack_end(fpn) && !((unsigned long)fpn & 0x3)
2923f5ea7738cb9 Greentime Hu 2017-10-24 23 && (fpn >= (unsigned long *)TASK_SIZE)) {
2923f5ea7738cb9 Greentime Hu 2017-10-24 24 unsigned long lpp, fpp;
2923f5ea7738cb9 Greentime Hu 2017-10-24 25
95f93ed7fe92c16 Zong Li 2018-08-20 26 lpp = fpn[LP_OFFSET];
2923f5ea7738cb9 Greentime Hu 2017-10-24 27 fpp = fpn[FP_OFFSET];
2923f5ea7738cb9 Greentime Hu 2017-10-24 28 if (!__kernel_text_address(lpp))
2923f5ea7738cb9 Greentime Hu 2017-10-24 29 break;
1e377ae9b04aef4 Zong Li 2018-08-15 30 else
1e377ae9b04aef4 Zong Li 2018-08-15 31 lpp = ftrace_graph_ret_addr(tsk, &graph_idx, lpp, NULL);
2923f5ea7738cb9 Greentime Hu 2017-10-24 32
2923f5ea7738cb9 Greentime Hu 2017-10-24 33 if (savesched || !in_sched_functions(lpp)) {
2923f5ea7738cb9 Greentime Hu 2017-10-24 34 if (skip) {
2923f5ea7738cb9 Greentime Hu 2017-10-24 35 skip--;
2923f5ea7738cb9 Greentime Hu 2017-10-24 36 } else {
2923f5ea7738cb9 Greentime Hu 2017-10-24 37 trace->entries[trace->nr_entries++] = lpp;
2923f5ea7738cb9 Greentime Hu 2017-10-24 38 if (trace->nr_entries >= trace->max_entries)
2923f5ea7738cb9 Greentime Hu 2017-10-24 39 break;
2923f5ea7738cb9 Greentime Hu 2017-10-24 40 }
2923f5ea7738cb9 Greentime Hu 2017-10-24 41 }
2923f5ea7738cb9 Greentime Hu 2017-10-24 42 fpn = (unsigned long *)fpp;
2923f5ea7738cb9 Greentime Hu 2017-10-24 43 }
2923f5ea7738cb9 Greentime Hu 2017-10-24 44 }
48f17ab32afc56a Peter Zijlstra 2021-09-30 45 void save_stack_trace(struct stack_trace *trace)
48f17ab32afc56a Peter Zijlstra 2021-09-30 46 {
48f17ab32afc56a Peter Zijlstra 2021-09-30 47 __save_stack_trace_tsk(current, trace, true);
48f17ab32afc56a Peter Zijlstra 2021-09-30 48 }
48f17ab32afc56a Peter Zijlstra 2021-09-30 49 EXPORT_SYMBOL_GPL(save_stack_trace);
48f17ab32afc56a Peter Zijlstra 2021-09-30 50

:::::: The code at line 13 was first introduced by commit
:::::: 2923f5ea7738cb9f5372bb9d7ac9886cf4193003 nds32: Exception handling

:::::: TO: Greentime Hu <greentime@xxxxxxxxxxxxx>
:::::: CC: Greentime Hu <greentime@xxxxxxxxxxxxx>

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

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