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-buildid-cache.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) (limited to 'tools/perf/builtin-buildid-cache.c') diff --git a/tools/perf/builtin-buildid-cache.c b/tools/perf/builtin-buildid-cache.c index 995368e84e42..83654557e108 100644 --- a/tools/perf/builtin-buildid-cache.c +++ b/tools/perf/builtin-buildid-cache.c @@ -51,8 +51,8 @@ static int build_id_cache__add_file(const char *filename, const char *debugdir) return err; } -static int build_id_cache__remove_file(const char *filename __used, - const char *debugdir __used) +static int build_id_cache__remove_file(const char *filename __maybe_unused, + const char *debugdir __maybe_unused) { u8 build_id[BUILD_ID_SIZE]; char sbuild_id[BUILD_ID_SIZE * 2 + 1]; @@ -120,7 +120,8 @@ static int __cmd_buildid_cache(void) return 0; } -int cmd_buildid_cache(int argc, const char **argv, const char *prefix __used) +int cmd_buildid_cache(int argc, const char **argv, + const char *prefix __maybe_unused) { argc = parse_options(argc, argv, buildid_cache_options, buildid_cache_usage, 0); -- cgit v1.2.3