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/trace-event-scripting.c | 33 ++++++++++++++++++--------------- 1 file changed, 18 insertions(+), 15 deletions(-) (limited to 'tools/perf/util/trace-event-scripting.c') diff --git a/tools/perf/util/trace-event-scripting.c b/tools/perf/util/trace-event-scripting.c index 302ff262494c..8715a1006d00 100644 --- a/tools/perf/util/trace-event-scripting.c +++ b/tools/perf/util/trace-event-scripting.c @@ -35,11 +35,11 @@ static int stop_script_unsupported(void) return 0; } -static void process_event_unsupported(union perf_event *event __unused, - struct perf_sample *sample __unused, - struct perf_evsel *evsel __unused, - struct machine *machine __unused, - struct addr_location *al __unused) +static void process_event_unsupported(union perf_event *event __maybe_unused, + struct perf_sample *sample __maybe_unused, + struct perf_evsel *evsel __maybe_unused, + struct machine *machine __maybe_unused, + struct addr_location *al __maybe_unused) { } @@ -52,17 +52,19 @@ static void print_python_unsupported_msg(void) "\n etc.\n"); } -static int python_start_script_unsupported(const char *script __unused, - int argc __unused, - const char **argv __unused) +static int python_start_script_unsupported(const char *script __maybe_unused, + int argc __maybe_unused, + const char **argv __maybe_unused) { print_python_unsupported_msg(); return -1; } -static int python_generate_script_unsupported(struct pevent *pevent __unused, - const char *outfile __unused) +static int python_generate_script_unsupported(struct pevent *pevent + __maybe_unused, + const char *outfile + __maybe_unused) { print_python_unsupported_msg(); @@ -114,17 +116,18 @@ static void print_perl_unsupported_msg(void) "\n etc.\n"); } -static int perl_start_script_unsupported(const char *script __unused, - int argc __unused, - const char **argv __unused) +static int perl_start_script_unsupported(const char *script __maybe_unused, + int argc __maybe_unused, + const char **argv __maybe_unused) { print_perl_unsupported_msg(); return -1; } -static int perl_generate_script_unsupported(struct pevent *pevent __unused, - const char *outfile __unused) +static int perl_generate_script_unsupported(struct pevent *pevent + __maybe_unused, + const char *outfile __maybe_unused) { print_perl_unsupported_msg(); -- cgit v1.2.1