diff options
Diffstat (limited to 'kernel/events/core.c')
| -rw-r--r-- | kernel/events/core.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/kernel/events/core.c b/kernel/events/core.c index 55fb648a32b0..5fc1ded4b450 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -5980,6 +5980,22 @@ static u64 perf_virt_to_phys(u64 virt) return phys_addr; } +static struct perf_callchain_entry * +perf_callchain(struct perf_event *event, struct pt_regs *regs) +{ + bool kernel = !event->attr.exclude_callchain_kernel; + bool user = !event->attr.exclude_callchain_user; + /* Disallow cross-task user callchains. */ + bool crosstask = event->ctx->task && event->ctx->task != current; + const u32 max_stack = event->attr.sample_max_stack; + + if (!kernel && !user) + return NULL; + + return get_perf_callchain(regs, 0, kernel, user, + max_stack, crosstask, true); +} + void perf_prepare_sample(struct perf_event_header *header, struct perf_sample_data *data, struct perf_event *event, |