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Diffstat (limited to 'arch/x86/kernel/dumpstack_64.c')
-rw-r--r--arch/x86/kernel/dumpstack_64.c16
1 files changed, 9 insertions, 7 deletions
diff --git a/arch/x86/kernel/dumpstack_64.c b/arch/x86/kernel/dumpstack_64.c
index 0ad9597073f..d5e2a2ebb62 100644
--- a/arch/x86/kernel/dumpstack_64.c
+++ b/arch/x86/kernel/dumpstack_64.c
@@ -33,11 +33,6 @@ static char x86_stack_ids[][8] = {
#endif
};
-int x86_is_stack_id(int id, char *name)
-{
- return x86_stack_ids[id - 1] == name;
-}
-
static unsigned long *in_exception_stack(unsigned cpu, unsigned long stack,
unsigned *usedp, char **idp)
{
@@ -125,9 +120,15 @@ fixup_bp_irq_link(unsigned long bp, unsigned long *stack,
{
#ifdef CONFIG_FRAME_POINTER
struct stack_frame *frame = (struct stack_frame *)bp;
+ unsigned long next;
- if (!in_irq_stack(stack, irq_stack, irq_stack_end))
- return (unsigned long)frame->next_frame;
+ if (!in_irq_stack(stack, irq_stack, irq_stack_end)) {
+ if (!probe_kernel_address(&frame->next_frame, next))
+ return next;
+ else
+ WARN_ONCE(1, "Perf: bad frame pointer = %p in "
+ "callchain\n", &frame->next_frame);
+ }
#endif
return bp;
}
@@ -291,6 +292,7 @@ void show_registers(struct pt_regs *regs)
sp = regs->sp;
printk("CPU %d ", cpu);
+ print_modules();
__show_regs(regs, 1);
printk("Process %s (pid: %d, threadinfo %p, task %p)\n",
cur->comm, cur->pid, task_thread_info(cur), cur);