Both __trace_add_new_event() and __trace_early_add_new_event() do basically the same thing, except that __trace_add_new_event() does a little more. Instead of having duplicate code between the two functions, add a helper function trace_create_new_event() that both can use. This will help against having bugs fixed in one function but not the other.
Showing the changes to kernel/trace (1 of 1 file). Show all
Unified · Split
| @@ -1529,6 +1529,24 @@ __register_event(struct ftrace_event_call *call, struct module *mod) · 1528 unmodified lines | ||
| 1529 | 1529 | return 0; |
| 1530 | 1530 | } |
| 1531 | 1531 | |
| 1532 | +static struct ftrace_event_file * | |
| 1533 | +trace_create_new_event(struct ftrace_event_call *call, | |
| 1534 | + struct trace_array *tr) | |
| 1535 | +{ | |
| 1536 | + struct ftrace_event_file *file; | |
| 1537 | + | |
| 1538 | + file = kmem_cache_alloc(file_cachep, GFP_TRACE); | |
| 1539 | + if (!file) | |
| 1540 | + return NULL; | |
| 1541 | + | |
| 1542 | + file->event_call = call; | |
| 1543 | + file->tr = tr; | |
| 1544 | + atomic_set(&file->sm_ref, 0); | |
| 1545 | + list_add(&file->list, &tr->events); | |
| 1546 | + | |
| 1547 | + return file; | |
| 1548 | +} | |
| 1549 | + | |
| 1532 | 1550 | /* Add an event to a trace directory */ |
| 1533 | 1551 | static int |
| 1534 | 1552 | __trace_add_new_event(struct ftrace_event_call *call, |
| @@ -1540,15 +1558,10 @@ __trace_add_new_event(struct ftrace_event_call *call, · 5 unmodified lines | ||
| 1540 | 1558 | { |
| 1541 | 1559 | struct ftrace_event_file *file; |
| 1542 | 1560 | |
| 1543 | − file = kmem_cache_alloc(file_cachep, GFP_TRACE); | |
| 1561 | + file = trace_create_new_event(call, tr); | |
| 1544 | 1562 | if (!file) |
| 1545 | 1563 | return -ENOMEM; |
| 1546 | 1564 | |
| 1547 | − file->event_call = call; | |
| 1548 | − file->tr = tr; | |
| 1549 | − atomic_set(&file->sm_ref, 0); | |
| 1550 | − list_add(&file->list, &tr->events); | |
| 1551 | − | |
| 1552 | 1565 | return event_create_dir(tr->event_dir, file, id, enable, filter, format); |
| 1553 | 1566 | } |
| 1554 | 1567 | |
| @@ -1563,15 +1576,10 @@ __trace_early_add_new_event(struct ftrace_event_call *call, · 8 unmodified lines | ||
| 1563 | 1576 | { |
| 1564 | 1577 | struct ftrace_event_file *file; |
| 1565 | 1578 | |
| 1566 | − file = kmem_cache_alloc(file_cachep, GFP_TRACE); | |
| 1579 | + file = trace_create_new_event(call, tr); | |
| 1567 | 1580 | if (!file) |
| 1568 | 1581 | return -ENOMEM; |
| 1569 | 1582 | |
| 1570 | − file->event_call = call; | |
| 1571 | − file->tr = tr; | |
| 1572 | − atomic_set(&file->sm_ref, 0); | |
| 1573 | − list_add(&file->list, &tr->events); | |
| 1574 | − | |
| 1575 | 1583 | return 0; |
| 1576 | 1584 | } |
| 1577 | 1585 | |