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Subject[patch] uapi perf_event.h has a u64

Without the following patch I have problems compiling code using
the new PERF_EVENT_IOC_ID ioctl(). It looks like u64 was used
instead of __u64

Signed-off-by: Vince Weaver <vincent.weaver@maine.edu>

diff --git a/include/uapi/linux/perf_event.h b/include/uapi/linux/perf_event.h
index ca1d90b..40a1fb8 100644
--- a/include/uapi/linux/perf_event.h
+++ b/include/uapi/linux/perf_event.h
@@ -324,7 +324,7 @@ struct perf_event_attr {
#define PERF_EVENT_IOC_PERIOD _IOW('$', 4, __u64)
#define PERF_EVENT_IOC_SET_OUTPUT _IO ('$', 5)
#define PERF_EVENT_IOC_SET_FILTER _IOW('$', 6, char *)
-#define PERF_EVENT_IOC_ID _IOR('$', 7, u64 *)
+#define PERF_EVENT_IOC_ID _IOR('$', 7, __u64 *)

enum perf_event_ioc_flags {
PERF_IOC_FLAG_GROUP = 1U << 0,

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