perf counters: restructure the API

[deliverable/linux.git] / kernel / perf_counter.c

diff --git a/kernel/perf_counter.c b/kernel/perf_counter.c
index 2557c670a3bb88c6541ebc988bc53ad39b114eb2..0d323ceda3a40d8f93c2c40b0e4cf382a775d96b 100644 (file)
--- a/kernel/perf_counter.c
+++ b/kernel/perf_counter.c
@@ -669,7 +669,7 @@ perf_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
 {
        struct perf_counter *counter = file->private_data;
 
-       switch (counter->record_type) {
+       switch (counter->hw_event.record_type) {
        case PERF_RECORD_SIMPLE:
                return perf_read_hw(counter, buf, count);
 
@@ -707,7 +707,7 @@ static const struct file_operations perf_fops = {
  * Allocate and initialize a counter structure
  */
 static struct perf_counter *
-perf_counter_alloc(struct perf_counter_event *event, int cpu, u32 record_type)
+perf_counter_alloc(struct perf_counter_hw_event *hw_event, int cpu)
 {
        struct perf_counter *counter = kzalloc(sizeof(*counter), GFP_KERNEL);
 
@@ -718,31 +718,37 @@ perf_counter_alloc(struct perf_counter_event *event, int cpu, u32 record_type)
        INIT_LIST_HEAD(&counter->list);
        init_waitqueue_head(&counter->waitq);
 
-       counter->irqdata        = &counter->data[0];
-       counter->usrdata        = &counter->data[1];
-       counter->cpu            = cpu;
-       counter->record_type    = record_type;
-       counter->event          = *event;
-       counter->wakeup_pending = 0;
+       counter->irqdata                = &counter->data[0];
+       counter->usrdata                = &counter->data[1];
+       counter->cpu                    = cpu;
+       counter->hw_event               = *hw_event;
+       counter->wakeup_pending         = 0;
 
        return counter;
 }
 
 /**
- * sys_perf_task_open - open a performance counter associate it to a task
- * @hw_event_type:     event type for monitoring/sampling...
+ * sys_perf_task_open - open a performance counter, associate it to a task/cpu
+ *
+ * @hw_event_uptr:     event type attributes for monitoring/sampling
  * @pid:               target pid
+ * @cpu:               target cpu
+ * @group_fd:          group leader counter fd
  */
-asmlinkage int
-sys_perf_counter_open(struct perf_counter_event __user *uevent, u32 record_type,
-                     pid_t pid, int cpu, int masterfd)
+asmlinkage int sys_perf_counter_open(
+
+       struct perf_counter_hw_event    *hw_event_uptr          __user,
+       pid_t                           pid,
+       int                             cpu,
+       int                             group_fd)
+
 {
        struct perf_counter_context *ctx;
-       struct perf_counter_event event;
+       struct perf_counter_hw_event hw_event;
        struct perf_counter *counter;
        int ret;
 
-       if (copy_from_user(&event, uevent, sizeof(event)) != 0)
+       if (copy_from_user(&hw_event, hw_event_uptr, sizeof(hw_event)) != 0)
                return -EFAULT;
 
        ctx = find_get_context(pid, cpu);
@@ -750,7 +756,7 @@ sys_perf_counter_open(struct perf_counter_event __user *uevent, u32 record_type,
                return PTR_ERR(ctx);
 
        ret = -ENOMEM;
-       counter = perf_counter_alloc(&event, cpu, record_type);
+       counter = perf_counter_alloc(&hw_event, cpu);
        if (!counter)
                goto err_put_context;