ab1b6f03a1
Simplify the stacktrace code: - remove the unused task argument to save_stack_trace, it's always current - remove the all_contexts flag, it's alwasy 0 Signed-off-by: Christoph Hellwig <hch@lst.de> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Andi Kleen <ak@suse.de> Cc: Akinobu Mita <akinobu.mita@gmail.com> Acked-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
54 lines
1.2 KiB
C
54 lines
1.2 KiB
C
/*
|
|
* arch/x86_64/kernel/stacktrace.c
|
|
*
|
|
* Stack trace management functions
|
|
*
|
|
* Copyright (C) 2006 Red Hat, Inc., Ingo Molnar <mingo@redhat.com>
|
|
*/
|
|
#include <linux/sched.h>
|
|
#include <linux/stacktrace.h>
|
|
#include <linux/module.h>
|
|
#include <asm/stacktrace.h>
|
|
|
|
static void save_stack_warning(void *data, char *msg)
|
|
{
|
|
}
|
|
|
|
static void
|
|
save_stack_warning_symbol(void *data, char *msg, unsigned long symbol)
|
|
{
|
|
}
|
|
|
|
static int save_stack_stack(void *data, char *name)
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
static void save_stack_address(void *data, unsigned long addr)
|
|
{
|
|
struct stack_trace *trace = (struct stack_trace *)data;
|
|
if (trace->skip > 0) {
|
|
trace->skip--;
|
|
return;
|
|
}
|
|
if (trace->nr_entries < trace->max_entries)
|
|
trace->entries[trace->nr_entries++] = addr;
|
|
}
|
|
|
|
static struct stacktrace_ops save_stack_ops = {
|
|
.warning = save_stack_warning,
|
|
.warning_symbol = save_stack_warning_symbol,
|
|
.stack = save_stack_stack,
|
|
.address = save_stack_address,
|
|
};
|
|
|
|
/*
|
|
* Save stack-backtrace addresses into a stack_trace buffer.
|
|
*/
|
|
void save_stack_trace(struct stack_trace *trace)
|
|
{
|
|
dump_trace(current, NULL, NULL, &save_stack_ops, trace);
|
|
if (trace->nr_entries < trace->max_entries)
|
|
trace->entries[trace->nr_entries++] = ULONG_MAX;
|
|
}
|
|
EXPORT_SYMBOL(save_stack_trace);
|