Merge git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6

[mv-sheeva.git] / kernel / perf_event.c

diff --git a/kernel/perf_event.c b/kernel/perf_event.c
index 126a302c481c060782e811e92e3fca0386271208..999835b6112bc0705e6a511a63889a89c920b9d7 100644 (file)
--- a/kernel/perf_event.c
+++ b/kernel/perf_event.c
@@ -1901,11 +1901,12 @@ static void __perf_event_read(void *info)
                return;
 
        raw_spin_lock(&ctx->lock);
-       update_context_time(ctx);
+       if (ctx->is_active)
+               update_context_time(ctx);
        update_event_times(event);
+       if (event->state == PERF_EVENT_STATE_ACTIVE)
+               event->pmu->read(event);
        raw_spin_unlock(&ctx->lock);
-
-       event->pmu->read(event);
 }
 
 static inline u64 perf_event_count(struct perf_event *event)
@@ -1999,8 +2000,7 @@ static int alloc_callchain_buffers(void)
         * accessed from NMI. Use a temporary manual per cpu allocation
         * until that gets sorted out.
         */
-       size = sizeof(*entries) + sizeof(struct perf_callchain_entry *) *
-               num_possible_cpus();
+       size = offsetof(struct callchain_cpus_entries, cpu_entries[nr_cpu_ids]);
 
        entries = kzalloc(size, GFP_KERNEL);
        if (!entries)