perf evlist: Fix type for references to data_head/tail
The data_head and data_tail fields are defined as __u64 in linux/perf_event.h, but perf userspace uses int and unsigned int. Convert all references to u64 for consistency. Signed-off-by: David Ahern <dsahern@gmail.com> Acked-by: Peter Zijlstra <peterz@infradead.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1428420037-26599-1-git-send-email-dsahern@gmail.comSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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