From 1d037ca1648b775277fc96401ec2aa233724906c Mon Sep 17 00:00:00 2001 From: Irina Tirdea Date: Tue, 11 Sep 2012 01:15:03 +0300 Subject: perf tools: Use __maybe_used for unused variables perf defines both __used and __unused variables to use for marking unused variables. The variable __used is defined to __attribute__((__unused__)), which contradicts the kernel definition to __attribute__((__used__)) for new gcc versions. On Android, __used is also defined in system headers and this leads to warnings like: warning: '__used__' attribute ignored __unused is not defined in the kernel and is not a standard definition. If __unused is included everywhere instead of __used, this leads to conflicts with glibc headers, since glibc has a variables with this name in its headers. The best approach is to use __maybe_unused, the definition used in the kernel for __attribute__((unused)). In this way there is only one definition in perf sources (instead of 2 definitions that point to the same thing: __used and __unused) and it works on both Linux and Android. This patch simply replaces all instances of __used and __unused with __maybe_unused. Signed-off-by: Irina Tirdea Acked-by: Pekka Enberg Cc: David Ahern Cc: Ingo Molnar Cc: Namhyung Kim Cc: Paul Mackerras Cc: Peter Zijlstra Cc: Steven Rostedt Link: http://lkml.kernel.org/r/1347315303-29906-7-git-send-email-irina.tirdea@intel.com [ committer note: fixed up conflict with a116e05 in builtin-sched.c ] Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/session.c | 50 +++++++++++++++++++++++++---------------------- 1 file changed, 27 insertions(+), 23 deletions(-) (limited to 'tools/perf/util/session.c') diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c index e0fd6c71cc5f..3049b0ae7003 100644 --- a/tools/perf/util/session.c +++ b/tools/perf/util/session.c @@ -401,49 +401,53 @@ int machine__resolve_callchain(struct machine *machine, } -static int process_event_synth_tracing_data_stub(union perf_event *event __used, - struct perf_session *session __used) +static int process_event_synth_tracing_data_stub(union perf_event *event + __maybe_unused, + struct perf_session *session + __maybe_unused) { dump_printf(": unhandled!\n"); return 0; } -static int process_event_synth_attr_stub(union perf_event *event __used, - struct perf_evlist **pevlist __used) +static int process_event_synth_attr_stub(union perf_event *event __maybe_unused, + struct perf_evlist **pevlist + __maybe_unused) { dump_printf(": unhandled!\n"); return 0; } -static int process_event_sample_stub(struct perf_tool *tool __used, - union perf_event *event __used, - struct perf_sample *sample __used, - struct perf_evsel *evsel __used, - struct machine *machine __used) +static int process_event_sample_stub(struct perf_tool *tool __maybe_unused, + union perf_event *event __maybe_unused, + struct perf_sample *sample __maybe_unused, + struct perf_evsel *evsel __maybe_unused, + struct machine *machine __maybe_unused) { dump_printf(": unhandled!\n"); return 0; } -static int process_event_stub(struct perf_tool *tool __used, - union perf_event *event __used, - struct perf_sample *sample __used, - struct machine *machine __used) +static int process_event_stub(struct perf_tool *tool __maybe_unused, + union perf_event *event __maybe_unused, + struct perf_sample *sample __maybe_unused, + struct machine *machine __maybe_unused) { dump_printf(": unhandled!\n"); return 0; } -static int process_finished_round_stub(struct perf_tool *tool __used, - union perf_event *event __used, - struct perf_session *perf_session __used) +static int process_finished_round_stub(struct perf_tool *tool __maybe_unused, + union perf_event *event __maybe_unused, + struct perf_session *perf_session + __maybe_unused) { dump_printf(": unhandled!\n"); return 0; } -static int process_event_type_stub(struct perf_tool *tool __used, - union perf_event *event __used) +static int process_event_type_stub(struct perf_tool *tool __maybe_unused, + union perf_event *event __maybe_unused) { dump_printf(": unhandled!\n"); return 0; @@ -520,7 +524,7 @@ static void swap_sample_id_all(union perf_event *event, void *data) } static void perf_event__all64_swap(union perf_event *event, - bool sample_id_all __used) + bool sample_id_all __maybe_unused) { struct perf_event_header *hdr = &event->header; mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr)); @@ -631,7 +635,7 @@ void perf_event__attr_swap(struct perf_event_attr *attr) } static void perf_event__hdr_attr_swap(union perf_event *event, - bool sample_id_all __used) + bool sample_id_all __maybe_unused) { size_t size; @@ -643,14 +647,14 @@ static void perf_event__hdr_attr_swap(union perf_event *event, } static void perf_event__event_type_swap(union perf_event *event, - bool sample_id_all __used) + bool sample_id_all __maybe_unused) { event->event_type.event_type.event_id = bswap_64(event->event_type.event_type.event_id); } static void perf_event__tracing_data_swap(union perf_event *event, - bool sample_id_all __used) + bool sample_id_all __maybe_unused) { event->tracing_data.size = bswap_32(event->tracing_data.size); } @@ -791,7 +795,7 @@ static int flush_sample_queue(struct perf_session *s, * etc... */ static int process_finished_round(struct perf_tool *tool, - union perf_event *event __used, + union perf_event *event __maybe_unused, struct perf_session *session) { int ret = flush_sample_queue(session, tool); -- cgit v1.2.3