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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>
38 lines
896 B
C
38 lines
896 B
C
/*
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* kernel/stacktrace.c
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*
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* Stack trace management functions
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*
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* Copyright (C) 2006 Red Hat, Inc., Ingo Molnar <mingo@redhat.com>
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*/
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#include <linux/sched.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/kallsyms.h>
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#include <linux/stacktrace.h>
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void print_stack_trace(struct stack_trace *trace, int spaces)
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{
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int i;
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if (WARN_ON(!trace->entries))
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return;
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for (i = 0; i < trace->nr_entries; i++) {
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printk("%*c", 1 + spaces, ' ');
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print_ip_sym(trace->entries[i]);
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}
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}
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EXPORT_SYMBOL_GPL(print_stack_trace);
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/*
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* Architectures that do not implement save_stack_trace_tsk get this
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* weak alias and a once-per-bootup warning (whenever this facility
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* is utilized - for example by procfs):
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*/
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__weak void
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save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace)
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{
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WARN_ONCE(1, KERN_INFO "save_stack_trace_tsk() not implemented yet.\n");
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}
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