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-rw-r--r--drivers/oprofile/cpu_buffer.c34
1 files changed, 0 insertions, 34 deletions
diff --git a/drivers/oprofile/cpu_buffer.c b/drivers/oprofile/cpu_buffer.c
index eb280ec96e24..7f7fc958297a 100644
--- a/drivers/oprofile/cpu_buffer.c
+++ b/drivers/oprofile/cpu_buffer.c
@@ -145,18 +145,6 @@ void end_cpu_work(void)
flush_scheduled_work();
}
-/* compute number of available slots in cpu_buffer queue */
-static unsigned long nr_available_slots(struct oprofile_cpu_buffer const *b)
-{
- unsigned long head = b->head_pos;
- unsigned long tail = b->tail_pos;
-
- if (tail > head)
- return (tail - head) - 1;
-
- return tail + (b->buffer_size - head) - 1;
-}
-
static inline void
add_sample(struct oprofile_cpu_buffer *cpu_buf,
unsigned long pc, unsigned long event)
@@ -206,11 +194,6 @@ static int log_sample(struct oprofile_cpu_buffer *cpu_buf, unsigned long pc,
return 0;
}
- if (nr_available_slots(cpu_buf) < 3) {
- cpu_buf->sample_lost_overflow++;
- return 0;
- }
-
is_kernel = !!is_kernel;
task = current;
@@ -233,11 +216,6 @@ static int log_sample(struct oprofile_cpu_buffer *cpu_buf, unsigned long pc,
static int oprofile_begin_trace(struct oprofile_cpu_buffer *cpu_buf)
{
- if (nr_available_slots(cpu_buf) < 4) {
- cpu_buf->sample_lost_overflow++;
- return 0;
- }
-
add_code(cpu_buf, CPU_TRACE_BEGIN);
cpu_buf->tracing = 1;
return 1;
@@ -291,12 +269,6 @@ void oprofile_add_ibs_sample(struct pt_regs * const regs,
cpu_buf->sample_received++;
- if (nr_available_slots(cpu_buf) < MAX_IBS_SAMPLE_SIZE) {
- /* we can't backtrace since we lost the source of this event */
- cpu_buf->sample_lost_overflow++;
- return;
- }
-
/* notice a switch from user->kernel or vice versa */
if (cpu_buf->last_is_kernel != is_kernel) {
cpu_buf->last_is_kernel = is_kernel;
@@ -342,12 +314,6 @@ void oprofile_add_trace(unsigned long pc)
if (!cpu_buf->tracing)
return;
- if (nr_available_slots(cpu_buf) < 1) {
- cpu_buf->tracing = 0;
- cpu_buf->sample_lost_overflow++;
- return;
- }
-
/*
* broken frame can give an eip with the same value as an
* escape code, abort the trace if we get it