#include <asm/irq_regs.h>
-static atomic_t nr_events __read_mostly;
+atomic_t perf_task_events __read_mostly;
static atomic_t nr_mmap_events __read_mostly;
static atomic_t nr_comm_events __read_mostly;
static atomic_t nr_task_events __read_mostly;
* accessing the event control register. If a NMI hits, then it will
* not restart the event.
*/
-void perf_event_task_sched_out(struct task_struct *task,
- struct task_struct *next)
+void __perf_event_task_sched_out(struct task_struct *task,
+ struct task_struct *next)
{
int ctxn;
cpuctx->task_ctx = NULL;
}
-/*
- * Called with IRQs disabled
- */
-static void __perf_event_task_sched_out(struct perf_event_context *ctx)
-{
- task_ctx_sched_out(ctx, EVENT_ALL);
-}
-
/*
* Called with IRQs disabled
*/
* accessing the event control register. If a NMI hits, then it will
* keep the event running.
*/
-void perf_event_task_sched_in(struct task_struct *task)
+void __perf_event_task_sched_in(struct task_struct *task)
{
struct perf_event_context *ctx;
int ctxn;
irq_work_sync(&event->pending);
if (!event->parent) {
- atomic_dec(&nr_events);
+ if (event->attach_state & PERF_ATTACH_TASK)
+ jump_label_dec(&perf_task_events);
if (event->attr.mmap || event->attr.mmap_data)
atomic_dec(&nr_mmap_events);
if (event->attr.comm)
static int perf_event_period(struct perf_event *event, u64 __user *arg)
{
struct perf_event_context *ctx = event->ctx;
- unsigned long size;
int ret = 0;
u64 value;
if (!event->attr.sample_period)
return -EINVAL;
- size = copy_from_user(&value, arg, sizeof(value));
- if (size != sizeof(value))
+ if (copy_from_user(&value, arg, sizeof(value)))
return -EFAULT;
if (!value)
WARN_ON(event->parent);
- atomic_dec(&perf_swevent_enabled[event_id]);
+ jump_label_dec(&perf_swevent_enabled[event_id]);
swevent_hlist_put(event);
}
if (err)
return err;
- atomic_inc(&perf_swevent_enabled[event_id]);
+ jump_label_inc(&perf_swevent_enabled[event_id]);
event->destroy = sw_perf_event_destroy;
}
*/
static struct perf_event *
perf_event_alloc(struct perf_event_attr *attr, int cpu,
- struct perf_event *group_leader,
- struct perf_event *parent_event,
- perf_overflow_handler_t overflow_handler)
+ struct task_struct *task,
+ struct perf_event *group_leader,
+ struct perf_event *parent_event,
+ perf_overflow_handler_t overflow_handler)
{
struct pmu *pmu;
struct perf_event *event;
event->state = PERF_EVENT_STATE_INACTIVE;
+ if (task) {
+ event->attach_state = PERF_ATTACH_TASK;
+#ifdef CONFIG_HAVE_HW_BREAKPOINT
+ /*
+ * hw_breakpoint is a bit difficult here..
+ */
+ if (attr->type == PERF_TYPE_BREAKPOINT)
+ event->hw.bp_target = task;
+#endif
+ }
+
if (!overflow_handler && parent_event)
overflow_handler = parent_event->overflow_handler;
event->pmu = pmu;
if (!event->parent) {
- atomic_inc(&nr_events);
+ if (event->attach_state & PERF_ATTACH_TASK)
+ jump_label_inc(&perf_task_events);
if (event->attr.mmap || event->attr.mmap_data)
atomic_inc(&nr_mmap_events);
if (event->attr.comm)
group_leader = NULL;
}
- event = perf_event_alloc(&attr, cpu, group_leader, NULL, NULL);
+ if (pid != -1) {
+ task = find_lively_task_by_vpid(pid);
+ if (IS_ERR(task)) {
+ err = PTR_ERR(task);
+ goto err_group_fd;
+ }
+ }
+
+ event = perf_event_alloc(&attr, cpu, task, group_leader, NULL, NULL);
if (IS_ERR(event)) {
err = PTR_ERR(event);
- goto err_fd;
+ goto err_task;
}
/*
}
}
- if (pid != -1) {
- task = find_lively_task_by_vpid(pid);
- if (IS_ERR(task)) {
- err = PTR_ERR(task);
- goto err_group_fd;
- }
- }
-
/*
* Get the target context (task or percpu):
*/
ctx = find_get_context(pmu, task, cpu);
if (IS_ERR(ctx)) {
err = PTR_ERR(ctx);
- goto err_task;
+ goto err_alloc;
}
/*
err_context:
put_ctx(ctx);
+err_alloc:
+ free_event(event);
err_task:
if (task)
put_task_struct(task);
err_group_fd:
fput_light(group_file, fput_needed);
- free_event(event);
err_fd:
put_unused_fd(event_fd);
return err;
* Get the target context (task or percpu):
*/
- event = perf_event_alloc(attr, cpu, NULL, NULL, overflow_handler);
+ event = perf_event_alloc(attr, cpu, task, NULL, NULL, overflow_handler);
if (IS_ERR(event)) {
err = PTR_ERR(event);
goto err;
* our context.
*/
child_ctx = child->perf_event_ctxp[ctxn];
- __perf_event_task_sched_out(child_ctx);
+ task_ctx_sched_out(child_ctx, EVENT_ALL);
/*
* Take the context lock here so that if find_get_context is
child_event = perf_event_alloc(&parent_event->attr,
parent_event->cpu,
+ child,
group_leader, parent_event,
NULL);
if (IS_ERR(child_event))