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path: root/drivers/oprofile/buffer_sync.c
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Diffstat (limited to 'drivers/oprofile/buffer_sync.c')
-rw-r--r--drivers/oprofile/buffer_sync.c24
1 files changed, 11 insertions, 13 deletions
diff --git a/drivers/oprofile/buffer_sync.c b/drivers/oprofile/buffer_sync.c
index 69a732778ba7..615929f6f0c2 100644
--- a/drivers/oprofile/buffer_sync.c
+++ b/drivers/oprofile/buffer_sync.c
@@ -268,6 +268,17 @@ lookup_dcookie(struct mm_struct *mm, unsigned long addr, off_t *offset)
268 return cookie; 268 return cookie;
269} 269}
270 270
271static void increment_tail(struct oprofile_cpu_buffer *b)
272{
273 unsigned long new_tail = b->tail_pos + 1;
274
275 rmb();
276
277 if (new_tail < b->buffer_size)
278 b->tail_pos = new_tail;
279 else
280 b->tail_pos = 0;
281}
271 282
272static unsigned long last_cookie = INVALID_COOKIE; 283static unsigned long last_cookie = INVALID_COOKIE;
273 284
@@ -417,19 +428,6 @@ static unsigned long get_slots(struct oprofile_cpu_buffer *b)
417} 428}
418 429
419 430
420static void increment_tail(struct oprofile_cpu_buffer *b)
421{
422 unsigned long new_tail = b->tail_pos + 1;
423
424 rmb();
425
426 if (new_tail < b->buffer_size)
427 b->tail_pos = new_tail;
428 else
429 b->tail_pos = 0;
430}
431
432
433/* Move tasks along towards death. Any tasks on dead_tasks 431/* Move tasks along towards death. Any tasks on dead_tasks
434 * will definitely have no remaining references in any 432 * will definitely have no remaining references in any
435 * CPU buffers at this point, because we use two lists, 433 * CPU buffers at this point, because we use two lists,