[PATCH v2 3/3] ARM: stacktrace: enable save_stack_trace_tsk for CONFIG_SMP
From: Colin Cross <hidden>
Date: 2012-11-29 23:00:27
Subsystem:
arm port, the rest · Maintainers:
Russell King, Linus Torvalds
Now that unwind_frame has been hardened against invalid stacks for CONFIG_ARM_UNWIND or CONFIG_FRAME_POINTER, enable dumping the stack on non-current threads for CONFIG_SMP. Signed-off-by: Colin Cross <redacted> --- arch/arm/kernel/stacktrace.c | 11 ----------- 1 files changed, 0 insertions(+), 11 deletions(-)
diff --git a/arch/arm/kernel/stacktrace.c b/arch/arm/kernel/stacktrace.c
index c5ae9be..6c00a9b 100644
--- a/arch/arm/kernel/stacktrace.c
+++ b/arch/arm/kernel/stacktrace.c@@ -187,22 +187,11 @@ void save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace) data.skip = trace->skip; if (tsk != current) { -#ifdef CONFIG_SMP - /* - * What guarantees do we have here that 'tsk' is not - * running on another CPU? For now, ignore it as we - * can't guarantee we won't explode. - */ - if (trace->nr_entries < trace->max_entries) - trace->entries[trace->nr_entries++] = ULONG_MAX; - return; -#else data.no_sched_functions = 1; frame.fp = thread_saved_fp(tsk); frame.sp = thread_saved_sp(tsk); frame.lr = 0; /* recovered from the stack */ frame.pc = thread_saved_pc(tsk); -#endif } else { register unsigned long current_sp asm ("sp");
--
1.7.7.3