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author | Irina Tirdea <irina.tirdea@gmail.com> | 2012-09-11 01:15:03 +0300 |
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committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2012-09-11 12:19:15 -0300 |
commit | 1d037ca1648b775277fc96401ec2aa233724906c (patch) | |
tree | 266722dc6c9e00c67c66f5f8d06f30d0c2dd3979 /tools/perf/builtin-timechart.c | |
parent | 7dbf4dcfe2987c35c2c4675cd7ae1b6006979176 (diff) | |
download | linux-1d037ca1648b775277fc96401ec2aa233724906c.tar.gz linux-1d037ca1648b775277fc96401ec2aa233724906c.tar.bz2 linux-1d037ca1648b775277fc96401ec2aa233724906c.zip |
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 <irina.tirdea@intel.com>
Acked-by: Pekka Enberg <penberg@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Namhyung Kim <namhyung.kim@lge.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Steven Rostedt <rostedt@goodmis.org>
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 <acme@redhat.com>
Diffstat (limited to 'tools/perf/builtin-timechart.c')
-rw-r--r-- | tools/perf/builtin-timechart.c | 30 |
1 files changed, 16 insertions, 14 deletions
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); |