perf/hwpb: Invoke __perf_event_disable() if interrupts are already disabled

[pandora-kernel.git] / include / linux / perf_event.h

diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index 3cfcfea..bee2357 100644 (file)
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -300,13 +300,15 @@ struct perf_event_mmap_page {
        /*
         * Control data for the mmap() data buffer.
         *
-        * User-space reading the @data_head value should issue an rmb(), on
-        * SMP capable platforms, after reading this value -- see
-        * perf_event_wakeup().
+        * User-space reading the @data_head value should issue an smp_rmb(),
+        * after reading this value.
         *
         * When the mapping is PROT_WRITE the @data_tail value should be
-        * written by userspace to reflect the last read data. In this case
-        * the kernel will not over-write unread data.
+        * written by userspace to reflect the last read data, after issueing
+        * an smp_mb() to separate the data read from the ->data_tail store.
+        * In this case the kernel will not over-write unread data.
+        *
+        * See perf_output_put_handle() for the data ordering.
         */
        __u64   data_head;              /* head in the data section */
        __u64   data_tail;              /* user-space written tail */
@@ -857,11 +859,6 @@ struct perf_event {
 #endif /* CONFIG_PERF_EVENTS */
 };
 
-enum perf_event_context_type {
-       task_context,
-       cpu_context,
-};
-
 /**
  * struct perf_event_context - event context structure
  *
@@ -869,7 +866,6 @@ enum perf_event_context_type {
  */
 struct perf_event_context {
        struct pmu                      *pmu;
-       enum perf_event_context_type    type;
        /*
         * Protect the states of the events in the list,
         * nr_active, and the list:
@@ -927,7 +923,7 @@ struct perf_cpu_context {
        int                             exclusive;
        struct list_head                rotation_list;
        int                             jiffies_interval;
-       struct pmu                      *active_pmu;
+       struct pmu                      *unique_pmu;
        struct perf_cgroup              *cgrp;
 };
 
@@ -1144,6 +1140,7 @@ extern int perf_swevent_get_recursion_context(void);
 extern void perf_swevent_put_recursion_context(int rctx);
 extern void perf_event_enable(struct perf_event *event);
 extern void perf_event_disable(struct perf_event *event);
+extern int __perf_event_disable(void *info);
 extern void perf_event_task_tick(void);
 #else
 static inline void
@@ -1182,6 +1179,7 @@ static inline int  perf_swevent_get_recursion_context(void)               { return -1; }
 static inline void perf_swevent_put_recursion_context(int rctx)                { }
 static inline void perf_event_enable(struct perf_event *event)         { }
 static inline void perf_event_disable(struct perf_event *event)                { }
+static inline int __perf_event_disable(void *info)                     { return -1; }
 static inline void perf_event_task_tick(void)                          { }
 #endif