2 files changed, 8 insertions, 1 deletions

diff --git a/include/linux/perf_counter.h b/include/linux/perf_counter.h
index 7f5d353d78ac..5bd8817b12d4 100644
--- a/include/linux/perf_counter.h
+++ b/include/linux/perf_counter.h
@@ -201,9 +201,13 @@ struct perf_counter_mmap_page {
         __u32   data_head;              /* head in the data section */
 };
 
+#define PERF_EVENT_MISC_KERNEL  (1 << 0)
+#define PERF_EVENT_MISC_USER    (1 << 1)
+
 struct perf_event_header {
         __u32   type;
-        __u32   size;
+        __u16   misc;
+        __u16   size;
 };
 
 enum perf_event_type {
diff --git a/kernel/perf_counter.c b/kernel/perf_counter.c
index 84a39081344c..4af98f943d3b 100644
--- a/kernel/perf_counter.c
+++ b/kernel/perf_counter.c
@@ -1831,6 +1831,9 @@ static void perf_counter_output(struct perf_counter *counter,
         header.type = PERF_EVENT_COUNTER_OVERFLOW;
         header.size = sizeof(header);
 
+        header.misc = user_mode(regs) ?
+                PERF_EVENT_MISC_USER : PERF_EVENT_MISC_KERNEL;
+
         if (record_type & PERF_RECORD_IP) {
                 ip = instruction_pointer(regs);
                 header.type |= __PERF_EVENT_IP;