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/builtin-timechart.c | 30 ++++++++++++++++-------------- 1 file changed, 16 insertions(+), 14 deletions(-) (limited to 'tools/perf/builtin-timechart.c') diff --git a/tools/perf/builtin-timechart.c b/tools/perf/builtin-timechart.c index 3b75b2e21ea5..55a3a6c6b9e7 100644 --- a/tools/perf/builtin-timechart.c +++ b/tools/perf/builtin-timechart.c @@ -275,28 +275,28 @@ static int cpus_cstate_state[MAX_CPUS]; static u64 cpus_pstate_start_times[MAX_CPUS]; static u64 cpus_pstate_state[MAX_CPUS]; -static int process_comm_event(struct perf_tool *tool __used, +static int process_comm_event(struct perf_tool *tool __maybe_unused, union perf_event *event, - struct perf_sample *sample __used, - struct machine *machine __used) + struct perf_sample *sample __maybe_unused, + struct machine *machine __maybe_unused) { pid_set_comm(event->comm.tid, event->comm.comm); return 0; } -static int process_fork_event(struct perf_tool *tool __used, +static int process_fork_event(struct perf_tool *tool __maybe_unused, union perf_event *event, - struct perf_sample *sample __used, - struct machine *machine __used) + struct perf_sample *sample __maybe_unused, + struct machine *machine __maybe_unused) { pid_fork(event->fork.pid, event->fork.ppid, event->fork.time); return 0; } -static int process_exit_event(struct perf_tool *tool __used, +static int process_exit_event(struct perf_tool *tool __maybe_unused, union perf_event *event, - struct perf_sample *sample __used, - struct machine *machine __used) + struct perf_sample *sample __maybe_unused, + struct machine *machine __maybe_unused) { pid_exit(event->fork.pid, event->fork.time); return 0; @@ -491,11 +491,11 @@ static void sched_switch(int cpu, u64 timestamp, struct trace_entry *te) } -static int process_sample_event(struct perf_tool *tool __used, - union perf_event *event __used, +static int process_sample_event(struct perf_tool *tool __maybe_unused, + union perf_event *event __maybe_unused, struct perf_sample *sample, struct perf_evsel *evsel, - struct machine *machine __used) + struct machine *machine __maybe_unused) { struct trace_entry *te; @@ -1081,7 +1081,8 @@ static int __cmd_record(int argc, const char **argv) } static int -parse_process(const struct option *opt __used, const char *arg, int __used unset) +parse_process(const struct option *opt __maybe_unused, const char *arg, + int __maybe_unused unset) { if (arg) add_process_filter(arg); @@ -1106,7 +1107,8 @@ static const struct option options[] = { }; -int cmd_timechart(int argc, const char **argv, const char *prefix __used) +int cmd_timechart(int argc, const char **argv, + const char *prefix __maybe_unused) { argc = parse_options(argc, argv, options, timechart_usage, PARSE_OPT_STOP_AT_NON_OPTION); -- cgit v1.2.3