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/unwind.h | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) (limited to 'tools/perf/util/unwind.h') diff --git a/tools/perf/util/unwind.h b/tools/perf/util/unwind.h index 919bd6ad8501..a78c8b303bb5 100644 --- a/tools/perf/util/unwind.h +++ b/tools/perf/util/unwind.h @@ -22,11 +22,12 @@ int unwind__get_entries(unwind_entry_cb_t cb, void *arg, int unwind__arch_reg_id(int regnum); #else static inline int -unwind__get_entries(unwind_entry_cb_t cb __used, void *arg __used, - struct machine *machine __used, - struct thread *thread __used, - u64 sample_uregs __used, - struct perf_sample *data __used) +unwind__get_entries(unwind_entry_cb_t cb __maybe_unused, + void *arg __maybe_unused, + struct machine *machine __maybe_unused, + struct thread *thread __maybe_unused, + u64 sample_uregs __maybe_unused, + struct perf_sample *data __maybe_unused) { return 0; } -- cgit v1.2.3