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Subject[tip:WIP.core/stacktrace 18/47] kernel//trace/trace_stack.c:24:17: error: static declaration of 'stack_trace_index' follows non-static declaration
tree:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git WIP.core/stacktrace
head: 63c35ea6b829a0f98d307a8dec038095681ecd13
commit: 4a934c54305ab50cf2d4b0afb915feee0dbb487e [18/47] tracing: Cleanup stack trace code
config: i386-randconfig-x010-201915 (attached as .config)
compiler: gcc-7 (Debian 7.3.0-1) 7.3.0
reproduce:
git checkout 4a934c54305ab50cf2d4b0afb915feee0dbb487e
# save the attached .config to linux build tree
make ARCH=i386

All errors (new ones prefixed by >>):

>> kernel//trace/trace_stack.c:24:17: error: static declaration of 'stack_trace_index' follows non-static declaration
static unsigned stack_trace_index[STACK_TRACE_ENTRIES];
^~~~~~~~~~~~~~~~~
In file included from kernel//trace/trace_stack.c:12:0:
include/linux/ftrace.h:248:17: note: previous declaration of 'stack_trace_index' was here
extern unsigned stack_trace_index[];
^~~~~~~~~~~~~~~~~
>> kernel//trace/trace_stack.c:36:22: error: static declaration of 'stack_trace_max_size' follows non-static declaration
static unsigned long stack_trace_max_size;
^~~~~~~~~~~~~~~~~~~~
In file included from kernel//trace/trace_stack.c:12:0:
include/linux/ftrace.h:250:22: note: previous declaration of 'stack_trace_max_size' was here
extern unsigned long stack_trace_max_size;
^~~~~~~~~~~~~~~~~~~~
>> kernel//trace/trace_stack.c:37:24: error: static declaration of 'stack_trace_max_lock' follows non-static declaration
static arch_spinlock_t stack_trace_max_lock =
^~~~~~~~~~~~~~~~~~~~
In file included from kernel//trace/trace_stack.c:12:0:
include/linux/ftrace.h:251:24: note: previous declaration of 'stack_trace_max_lock' was here
extern arch_spinlock_t stack_trace_max_lock;
^~~~~~~~~~~~~~~~~~~~

vim +/stack_trace_index +24 kernel//trace/trace_stack.c

22
23 static unsigned long stack_dump_trace[STACK_TRACE_ENTRIES];
> 24 static unsigned stack_trace_index[STACK_TRACE_ENTRIES];
25
26 /*
27 * Reserve one entry for the passed in ip. This will allow
28 * us to remove most or all of the stack size overhead
29 * added by the stack tracer itself.
30 */
31 struct stack_trace stack_trace_max = {
32 .max_entries = STACK_TRACE_ENTRIES - 1,
33 .entries = &stack_dump_trace[0],
34 };
35
> 36 static unsigned long stack_trace_max_size;
> 37 static arch_spinlock_t stack_trace_max_lock =
38 (arch_spinlock_t)__ARCH_SPIN_LOCK_UNLOCKED;
39

---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
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