Using linux-3.18.y branch, perf build fails with the following: $ make -s -j16 -C tools/perf V=1 WERROR=0 NO_LIBUNWIND=1 HAVE_CPLUS_DEMANGLE=1 NO_GTK2=1 NO_LIBNUMA=1 NO_STRLCPY=1 NO_BIONIC=1 prefix=/usr DESTDIR=/tmp/builddir/build all [...] util/session.c: In function ‘__perf_session__process_pipe_events’: util/session.c:1093:36: error: ‘oe’ undeclared (first use in this function) ordered_events__set_copy_on_queue(oe, true); ^ util/session.c:1093:36: note: each undeclared identifier is reported only once for each function it appears in This patch fixes it for linux-3.18.y branch. Fixes: 95b33b99cdd6 ("perf inject: Copy events when reordering events in pipe mode") Cc: <stable@xxxxxxxxxxxxxxx> # 3.18.x Cc: Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx> Cc: Andi Kleen <ak@xxxxxxxxxxxxxxx> Cc: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx> Cc: David Carrillo-Cisneros <davidcc@xxxxxxxxxx> Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> Cc: He Kuang <hekuang@xxxxxxxxxx> Cc: Ingo Molnar <mingo@xxxxxxxxxx> Cc: Jiri Olsa <jolsa@xxxxxxxxxx> Cc: Masami Hiramatsu <mhiramat@xxxxxxxxxx> Cc: Paul Mackerras <paulus@xxxxxxxxx> Cc: Paul Turner <pjt@xxxxxxxxxx> Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx> Cc: Sasha Levin <alexander.levin@xxxxxxxxxxxxx> Cc: Simon Que <sque@xxxxxxxxxxxx> Cc: Stephane Eranian <eranian@xxxxxxxxxx> Cc: Wang Nan <wangnan0@xxxxxxxxxx> Signed-off-by: Murilo Opsfelder Araujo <muriloo@xxxxxxxxxxxxx> --- tools/perf/util/session.c | 1 + 1 file changed, 1 insertion(+) diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c index dc3d3b1b813e..c2d4a7ec40df 100644 --- a/tools/perf/util/session.c +++ b/tools/perf/util/session.c @@ -1073,6 +1073,7 @@ volatile int session_done; static int __perf_session__process_pipe_events(struct perf_session *session, struct perf_tool *tool) { + struct ordered_events *oe = &session->ordered_events; int fd = perf_data_file__fd(session->file); union perf_event *event; uint32_t size, cur_size = 0; -- 2.14.3