diff options
Diffstat (limited to 'kernel/events')
| -rw-r--r-- | kernel/events/Makefile | 2 | ||||
| -rw-r--r-- | kernel/events/core.c | 26 |
2 files changed, 25 insertions, 3 deletions
diff --git a/kernel/events/Makefile b/kernel/events/Makefile index 103f5d147b2f..2925188f50ea 100644 --- a/kernel/events/Makefile +++ b/kernel/events/Makefile @@ -1,5 +1,5 @@ ifdef CONFIG_FUNCTION_TRACER -CFLAGS_REMOVE_core.o = -pg +CFLAGS_REMOVE_core.o = $(CC_FLAGS_FTRACE) endif obj-y := core.o ring_buffer.o callchain.o diff --git a/kernel/events/core.c b/kernel/events/core.c index 525062b6fba1..b01dfb602db1 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -3587,7 +3587,7 @@ static void put_event(struct perf_event *event) ctx = perf_event_ctx_lock_nested(event, SINGLE_DEPTH_NESTING); WARN_ON_ONCE(ctx->parent_ctx); perf_remove_from_context(event, true); - mutex_unlock(&ctx->mutex); + perf_event_ctx_unlock(event, ctx); _free_event(event); } @@ -4423,7 +4423,7 @@ static int perf_mmap(struct file *file, struct vm_area_struct *vma) * If we have rb pages ensure they're a power-of-two number, so we * can do bitmasks instead of modulo. */ - if (!is_power_of_2(nr_pages)) + if (nr_pages != 0 && !is_power_of_2(nr_pages)) return -EINVAL; if (vma_size != PAGE_SIZE * (1 + nr_pages)) @@ -4570,6 +4570,13 @@ static void perf_pending_event(struct irq_work *entry) { struct perf_event *event = container_of(entry, struct perf_event, pending); + int rctx; + + rctx = perf_swevent_get_recursion_context(); + /* + * If we 'fail' here, that's OK, it means recursion is already disabled + * and we won't recurse 'further'. + */ if (event->pending_disable) { event->pending_disable = 0; @@ -4580,6 +4587,9 @@ static void perf_pending_event(struct irq_work *entry) event->pending_wakeup = 0; perf_event_wakeup(event); } + + if (rctx >= 0) + perf_swevent_put_recursion_context(rctx); } /* @@ -8516,6 +8526,18 @@ void __init perf_event_init(void) != 1024); } +ssize_t perf_event_sysfs_show(struct device *dev, struct device_attribute *attr, + char *page) +{ + struct perf_pmu_events_attr *pmu_attr = + container_of(attr, struct perf_pmu_events_attr, attr); + + if (pmu_attr->event_str) + return sprintf(page, "%s\n", pmu_attr->event_str); + + return 0; +} + static int __init perf_event_sysfs_init(void) { struct pmu *pmu; |