diff options
Diffstat (limited to 'arch/s390/kernel/perf_event.c')
| -rw-r--r-- | arch/s390/kernel/perf_event.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/arch/s390/kernel/perf_event.c b/arch/s390/kernel/perf_event.c index cfcba2d..0943b11 100644 --- a/arch/s390/kernel/perf_event.c +++ b/arch/s390/kernel/perf_event.c @@ -260,12 +260,13 @@ static unsigned long __store_trace(struct perf_callchain_entry *entry, void perf_callchain_kernel(struct perf_callchain_entry *entry, struct pt_regs *regs) { - unsigned long head; + unsigned long head, frame_size; struct stack_frame *head_sf; if (user_mode(regs)) return; + frame_size = STACK_FRAME_OVERHEAD + sizeof(struct pt_regs); head = regs->gprs[15]; head_sf = (struct stack_frame *) head; @@ -273,8 +274,9 @@ void perf_callchain_kernel(struct perf_callchain_entry *entry, return; head = head_sf->back_chain; - head = __store_trace(entry, head, S390_lowcore.async_stack - ASYNC_SIZE, - S390_lowcore.async_stack); + head = __store_trace(entry, head, + S390_lowcore.async_stack + frame_size - ASYNC_SIZE, + S390_lowcore.async_stack + frame_size); __store_trace(entry, head, S390_lowcore.thread_info, S390_lowcore.thread_info + THREAD_SIZE); |