shm: add memfd_create() syscall

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

diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index 1e9ebe5..8d5b91e 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 */
@@ -794,7 +796,7 @@ struct perf_event {
        struct hw_perf_event            hw;
 
        struct perf_event_context       *ctx;
-       struct file                     *filp;
+       atomic_long_t                   refcount;
 
        /*
         * These accumulate total time (in nanoseconds) that children
@@ -819,9 +821,9 @@ struct perf_event {
        /* mmap bits */
        struct mutex                    mmap_mutex;
        atomic_t                        mmap_count;
-       int                             mmap_locked;
-       struct user_struct              *mmap_user;
+
        struct ring_buffer              *rb;
+       struct list_head                rb_entry;
 
        /* poll related */
        wait_queue_head_t               waitq;
@@ -927,7 +929,7 @@ 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;
 };
 
@@ -1185,6 +1187,12 @@ static inline void perf_event_disable(struct perf_event *event)          { }
 static inline void perf_event_task_tick(void)                          { }
 #endif
 
+#if defined(CONFIG_PERF_EVENTS) && defined(CONFIG_CPU_SUP_INTEL)
+extern void perf_restore_debug_store(void);
+#else
+static inline void perf_restore_debug_store(void)                      { }
+#endif
+
 #define perf_output_put(handle, x) perf_output_copy((handle), &(x), sizeof(x))
 
 /*