diff options
Diffstat (limited to 'arch/s390/kernel/stacktrace.c')
| -rw-r--r-- | arch/s390/kernel/stacktrace.c | 21 |
1 files changed, 12 insertions, 9 deletions
diff --git a/arch/s390/kernel/stacktrace.c b/arch/s390/kernel/stacktrace.c index 75e6ea930692..e0fec2d8ac40 100644 --- a/arch/s390/kernel/stacktrace.c +++ b/arch/s390/kernel/stacktrace.c @@ -59,26 +59,29 @@ static unsigned long save_context_stack(struct stack_trace *trace, } } -void save_stack_trace(struct stack_trace *trace) +static void __save_stack_trace(struct stack_trace *trace, unsigned long sp) { - register unsigned long sp asm ("15"); - unsigned long orig_sp, new_sp, frame_size; + unsigned long new_sp, frame_size; frame_size = STACK_FRAME_OVERHEAD + sizeof(struct pt_regs); - orig_sp = sp; - new_sp = save_context_stack(trace, orig_sp, + new_sp = save_context_stack(trace, sp, S390_lowcore.panic_stack + frame_size - PAGE_SIZE, S390_lowcore.panic_stack + frame_size, 1); - if (new_sp != orig_sp) - return; new_sp = save_context_stack(trace, new_sp, S390_lowcore.async_stack + frame_size - ASYNC_SIZE, S390_lowcore.async_stack + frame_size, 1); - if (new_sp != orig_sp) - return; save_context_stack(trace, new_sp, S390_lowcore.thread_info, S390_lowcore.thread_info + THREAD_SIZE, 1); +} + +void save_stack_trace(struct stack_trace *trace) +{ + register unsigned long r15 asm ("15"); + unsigned long sp; + + sp = r15; + __save_stack_trace(trace, sp); if (trace->nr_entries < trace->max_entries) trace->entries[trace->nr_entries++] = ULONG_MAX; } |