oprofile: implement switch/case in buffer_sync.c
Signed-off-by: Robert Richter <robert.richter@amd.com>
diff --git a/drivers/oprofile/buffer_sync.c b/drivers/oprofile/buffer_sync.c
index 774b081..7d61ae8 100644
--- a/drivers/oprofile/buffer_sync.c
+++ b/drivers/oprofile/buffer_sync.c
@@ -561,6 +561,7 @@
{
struct oprofile_cpu_buffer *cpu_buf = &per_cpu(cpu_buffer, cpu);
struct mm_struct *mm = NULL;
+ struct mm_struct *oldmm;
struct task_struct *new;
unsigned long cookie = 0;
int in_kernel = 1;
@@ -586,34 +587,39 @@
struct op_sample *s = &cpu_buf->buffer[cpu_buf->tail_pos];
if (is_code(s->eip)) {
- if (s->event <= CPU_IS_KERNEL) {
+ switch (s->event) {
+ case 0:
+ case CPU_IS_KERNEL:
/* kernel/userspace switch */
in_kernel = s->event;
if (state == sb_buffer_start)
state = sb_sample_start;
add_kernel_ctx_switch(s->event);
- } else if (s->event == CPU_TRACE_BEGIN) {
+ break;
+ case CPU_TRACE_BEGIN:
state = sb_bt_start;
add_trace_begin();
+ break;
#ifdef CONFIG_OPROFILE_IBS
- } else if (s->event == IBS_FETCH_BEGIN) {
+ case IBS_FETCH_BEGIN:
state = sb_bt_start;
add_ibs_begin(cpu_buf, IBS_FETCH_CODE, mm);
- } else if (s->event == IBS_OP_BEGIN) {
+ break;
+ case IBS_OP_BEGIN:
state = sb_bt_start;
add_ibs_begin(cpu_buf, IBS_OP_CODE, mm);
+ break;
#endif
- } else {
- struct mm_struct *oldmm = mm;
-
+ default:
/* userspace context switch */
+ oldmm = mm;
new = (struct task_struct *)s->event;
-
release_mm(oldmm);
mm = take_tasks_mm(new);
if (mm != oldmm)
cookie = get_exec_dcookie(mm);
add_user_ctx_switch(new, cookie);
+ break;
}
} else if (state >= sb_bt_start &&
!add_sample(mm, s, in_kernel)) {