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Diffstat (limited to 'drivers/oprofile/buffer_sync.c')
-rw-r--r--drivers/oprofile/buffer_sync.c41
1 files changed, 34 insertions, 7 deletions
diff --git a/drivers/oprofile/buffer_sync.c b/drivers/oprofile/buffer_sync.c
index ed982273fb8b..b55cd23ffdef 100644
--- a/drivers/oprofile/buffer_sync.c
+++ b/drivers/oprofile/buffer_sync.c
@@ -41,7 +41,6 @@ static cpumask_t marked_cpus = CPU_MASK_NONE;
static DEFINE_SPINLOCK(task_mortuary);
static void process_task_mortuary(void);
-
/* Take ownership of the task struct and place it on the
* list for processing. Only after two full buffer syncs
* does the task eventually get freed, because by then
@@ -341,7 +340,7 @@ static void add_trace_begin(void)
* Add IBS fetch and op entries to event buffer
*/
static void add_ibs_begin(struct oprofile_cpu_buffer *cpu_buf, int code,
- int in_kernel, struct mm_struct *mm)
+ struct mm_struct *mm)
{
unsigned long rip;
int i, count;
@@ -565,9 +564,11 @@ void sync_buffer(int cpu)
struct task_struct *new;
unsigned long cookie = 0;
int in_kernel = 1;
- unsigned int i;
sync_buffer_state state = sb_buffer_start;
+#ifndef CONFIG_OPROFILE_IBS
+ unsigned int i;
unsigned long available;
+#endif
mutex_lock(&buffer_mutex);
@@ -575,9 +576,13 @@ void sync_buffer(int cpu)
/* Remember, only we can modify tail_pos */
+#ifndef CONFIG_OPROFILE_IBS
available = get_slots(cpu_buf);
for (i = 0; i < available; ++i) {
+#else
+ while (get_slots(cpu_buf)) {
+#endif
struct op_sample *s = &cpu_buf->buffer[cpu_buf->tail_pos];
if (is_code(s->eip)) {
@@ -593,12 +598,10 @@ void sync_buffer(int cpu)
#ifdef CONFIG_OPROFILE_IBS
} else if (s->event == IBS_FETCH_BEGIN) {
state = sb_bt_start;
- add_ibs_begin(cpu_buf,
- IBS_FETCH_CODE, in_kernel, mm);
+ add_ibs_begin(cpu_buf, IBS_FETCH_CODE, mm);
} else if (s->event == IBS_OP_BEGIN) {
state = sb_bt_start;
- add_ibs_begin(cpu_buf,
- IBS_OP_CODE, in_kernel, mm);
+ add_ibs_begin(cpu_buf, IBS_OP_CODE, mm);
#endif
} else {
struct mm_struct *oldmm = mm;
@@ -628,3 +631,27 @@ void sync_buffer(int cpu)
mutex_unlock(&buffer_mutex);
}
+
+/* The function can be used to add a buffer worth of data directly to
+ * the kernel buffer. The buffer is assumed to be a circular buffer.
+ * Take the entries from index start and end at index end, wrapping
+ * at max_entries.
+ */
+void oprofile_put_buff(unsigned long *buf, unsigned int start,
+ unsigned int stop, unsigned int max)
+{
+ int i;
+
+ i = start;
+
+ mutex_lock(&buffer_mutex);
+ while (i != stop) {
+ add_event_entry(buf[i++]);
+
+ if (i >= max)
+ i = 0;
+ }
+
+ mutex_unlock(&buffer_mutex);
+}
+