diff options
Diffstat (limited to 'arch/x86/kernel/dumpstack_64.c')
| -rw-r--r-- | arch/x86/kernel/dumpstack_64.c | 30 |
1 files changed, 4 insertions, 26 deletions
diff --git a/arch/x86/kernel/dumpstack_64.c b/arch/x86/kernel/dumpstack_64.c index 066eb5c77fd6..7f3b8066f719 100644 --- a/arch/x86/kernel/dumpstack_64.c +++ b/arch/x86/kernel/dumpstack_64.c @@ -151,25 +151,14 @@ void dump_trace(struct task_struct *task, struct pt_regs *regs, { const unsigned cpu = get_cpu(); unsigned long *irq_stack = (unsigned long *)per_cpu(irq_stack_ptr, cpu); - unsigned long dummy; unsigned used = 0; int graph = 0; int done = 0; - if (!task) - task = current; + task = task ? : current; + stack = stack ? : get_stack_pointer(task, regs); + bp = bp ? : (unsigned long)get_frame_pointer(task, regs); - if (!stack) { - if (regs) - stack = (unsigned long *)regs->sp; - else if (task != current) - stack = (unsigned long *)task->thread.sp; - else - stack = &dummy; - } - - if (!bp) - bp = stack_frame(task, regs); /* * Print function call entries in all stacks, starting at the * current stack address. If the stacks consist of nested @@ -256,18 +245,7 @@ show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs, irq_stack_end = (unsigned long *)(per_cpu(irq_stack_ptr, cpu)); irq_stack = irq_stack_end - (IRQ_STACK_SIZE / sizeof(long)); - /* - * Debugging aid: "show_stack(NULL, NULL);" prints the - * back trace for this cpu: - */ - if (sp == NULL) { - if (regs) - sp = (unsigned long *)regs->sp; - else if (task) - sp = (unsigned long *)task->thread.sp; - else - sp = (unsigned long *)&sp; - } + sp = sp ? : get_stack_pointer(task, regs); stack = sp; for (i = 0; i < kstack_depth_to_print; i++) { |