diff options
Diffstat (limited to 'drivers/oprofile')
-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 eb280ec96e24..7f7fc958297a 100644 --- a/drivers/oprofile/cpu_buffer.c +++ b/drivers/oprofile/cpu_buffer.c | |||
@@ -145,18 +145,6 @@ void end_cpu_work(void) | |||
145 | flush_scheduled_work(); | 145 | flush_scheduled_work(); |
146 | } | 146 | } |
147 | 147 | ||
148 | /* compute number of available slots in cpu_buffer queue */ | ||
149 | static unsigned long nr_available_slots(struct oprofile_cpu_buffer const *b) | ||
150 | { | ||
151 | unsigned long head = b->head_pos; | ||
152 | unsigned long tail = b->tail_pos; | ||
153 | |||
154 | if (tail > head) | ||
155 | return (tail - head) - 1; | ||
156 | |||
157 | return tail + (b->buffer_size - head) - 1; | ||
158 | } | ||
159 | |||
160 | static inline void | 148 | static inline void |
161 | add_sample(struct oprofile_cpu_buffer *cpu_buf, | 149 | add_sample(struct oprofile_cpu_buffer *cpu_buf, |
162 | unsigned long pc, unsigned long event) | 150 | unsigned long pc, unsigned long event) |
@@ -206,11 +194,6 @@ static int log_sample(struct oprofile_cpu_buffer *cpu_buf, unsigned long pc, | |||
206 | return 0; | 194 | return 0; |
207 | } | 195 | } |
208 | 196 | ||
209 | if (nr_available_slots(cpu_buf) < 3) { | ||
210 | cpu_buf->sample_lost_overflow++; | ||
211 | return 0; | ||
212 | } | ||
213 | |||
214 | is_kernel = !!is_kernel; | 197 | is_kernel = !!is_kernel; |
215 | 198 | ||
216 | task = current; | 199 | task = current; |
@@ -233,11 +216,6 @@ static int log_sample(struct oprofile_cpu_buffer *cpu_buf, unsigned long pc, | |||
233 | 216 | ||
234 | static int oprofile_begin_trace(struct oprofile_cpu_buffer *cpu_buf) | 217 | static int oprofile_begin_trace(struct oprofile_cpu_buffer *cpu_buf) |
235 | { | 218 | { |
236 | if (nr_available_slots(cpu_buf) < 4) { | ||
237 | cpu_buf->sample_lost_overflow++; | ||
238 | return 0; | ||
239 | } | ||
240 | |||
241 | add_code(cpu_buf, CPU_TRACE_BEGIN); | 219 | add_code(cpu_buf, CPU_TRACE_BEGIN); |
242 | cpu_buf->tracing = 1; | 220 | cpu_buf->tracing = 1; |
243 | return 1; | 221 | return 1; |
@@ -291,12 +269,6 @@ void oprofile_add_ibs_sample(struct pt_regs * const regs, | |||
291 | 269 | ||
292 | cpu_buf->sample_received++; | 270 | cpu_buf->sample_received++; |
293 | 271 | ||
294 | if (nr_available_slots(cpu_buf) < MAX_IBS_SAMPLE_SIZE) { | ||
295 | /* we can't backtrace since we lost the source of this event */ | ||
296 | cpu_buf->sample_lost_overflow++; | ||
297 | return; | ||
298 | } | ||
299 | |||
300 | /* notice a switch from user->kernel or vice versa */ | 272 | /* notice a switch from user->kernel or vice versa */ |
301 | if (cpu_buf->last_is_kernel != is_kernel) { | 273 | if (cpu_buf->last_is_kernel != is_kernel) { |
302 | cpu_buf->last_is_kernel = is_kernel; | 274 | cpu_buf->last_is_kernel = is_kernel; |
@@ -342,12 +314,6 @@ void oprofile_add_trace(unsigned long pc) | |||
342 | if (!cpu_buf->tracing) | 314 | if (!cpu_buf->tracing) |
343 | return; | 315 | return; |
344 | 316 | ||
345 | if (nr_available_slots(cpu_buf) < 1) { | ||
346 | cpu_buf->tracing = 0; | ||
347 | cpu_buf->sample_lost_overflow++; | ||
348 | return; | ||
349 | } | ||
350 | |||
351 | /* | 317 | /* |
352 | * broken frame can give an eip with the same value as an | 318 | * broken frame can give an eip with the same value as an |
353 | * escape code, abort the trace if we get it | 319 | * escape code, abort the trace if we get it |