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-lock.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'tools/perf/builtin-lock.c') diff --git a/tools/perf/builtin-lock.c b/tools/perf/builtin-lock.c index 75153c87e650..a8035207a3dd 100644 --- a/tools/perf/builtin-lock.c +++ b/tools/perf/builtin-lock.c @@ -870,7 +870,7 @@ static int dump_info(void) return rc; } -static int process_sample_event(struct perf_tool *tool __used, +static int process_sample_event(struct perf_tool *tool __maybe_unused, union perf_event *event, struct perf_sample *sample, struct perf_evsel *evsel, @@ -1020,7 +1020,7 @@ static int __cmd_record(int argc, const char **argv) return cmd_record(i, rec_argv, NULL); } -int cmd_lock(int argc, const char **argv, const char *prefix __used) +int cmd_lock(int argc, const char **argv, const char *prefix __maybe_unused) { unsigned int i; int rc = 0; -- cgit v1.2.1