diff options
Diffstat (limited to 'drivers/oprofile/cpu_buffer.c')
| -rw-r--r-- | drivers/oprofile/cpu_buffer.c | 34 |
1 files changed, 0 insertions, 34 deletions
diff --git a/drivers/oprofile/cpu_buffer.c b/drivers/oprofile/cpu_buffer.c index eb280ec96e2..7f7fc958297 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 |