9212ddb5ea
Impact: build fix Some architectures have not implemented save_stack_trace_tsk() yet: fs/built-in.o: In function `proc_pid_stack': base.c:(.text+0x3f140): undefined reference to `save_stack_trace_tsk' So warn about that if the facility is used. Signed-off-by: Ingo Molnar <mingo@elte.hu>
37 lines
896 B
C
37 lines
896 B
C
/*
|
|
* kernel/stacktrace.c
|
|
*
|
|
* Stack trace management functions
|
|
*
|
|
* Copyright (C) 2006 Red Hat, Inc., Ingo Molnar <mingo@redhat.com>
|
|
*/
|
|
#include <linux/sched.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/kallsyms.h>
|
|
#include <linux/stacktrace.h>
|
|
|
|
void print_stack_trace(struct stack_trace *trace, int spaces)
|
|
{
|
|
int i;
|
|
|
|
if (WARN_ON(!trace->entries))
|
|
return;
|
|
|
|
for (i = 0; i < trace->nr_entries; i++) {
|
|
printk("%*c", 1 + spaces, ' ');
|
|
print_ip_sym(trace->entries[i]);
|
|
}
|
|
}
|
|
EXPORT_SYMBOL_GPL(print_stack_trace);
|
|
|
|
/*
|
|
* Architectures that do not implement save_stack_trace_tsk get this
|
|
* weak alias and a once-per-bootup warning (whenever this facility
|
|
* is utilized - for example by procfs):
|
|
*/
|
|
__weak void
|
|
save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace)
|
|
{
|
|
WARN_ONCE(1, KERN_INFO "save_stack_trace_tsk() not implemented yet.\n");
|
|
}
|