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/lib/traceevent/event-parse.c | 8 +++++--- tools/lib/traceevent/event-parse.h | 4 ++-- 2 files changed, 7 insertions(+), 5 deletions(-) (limited to 'tools/lib/traceevent') diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c index f4190b5..2c54cdd 100644 --- a/tools/lib/traceevent/event-parse.c +++ b/tools/lib/traceevent/event-parse.c @@ -1824,7 +1824,7 @@ process_op(struct event_format *event, struct print_arg *arg, char **tok) } static enum event_type -process_entry(struct event_format *event __unused, struct print_arg *arg, +process_entry(struct event_format *event __maybe_unused, struct print_arg *arg, char **tok) { enum event_type type; @@ -2458,7 +2458,8 @@ process_paren(struct event_format *event, struct print_arg *arg, char **tok) static enum event_type -process_str(struct event_format *event __unused, struct print_arg *arg, char **tok) +process_str(struct event_format *event __maybe_unused, struct print_arg *arg, + char **tok) { enum event_type type; char *token; @@ -3653,7 +3654,8 @@ static void free_args(struct print_arg *args) } static char * -get_bprint_format(void *data, int size __unused, struct event_format *event) +get_bprint_format(void *data, int size __maybe_unused, + struct event_format *event) { struct pevent *pevent = event->pevent; unsigned long long addr; diff --git a/tools/lib/traceevent/event-parse.h b/tools/lib/traceevent/event-parse.h index 3318963..a4bbe24 100644 --- a/tools/lib/traceevent/event-parse.h +++ b/tools/lib/traceevent/event-parse.h @@ -24,8 +24,8 @@ #include #include -#ifndef __unused -#define __unused __attribute__ ((unused)) +#ifndef __maybe_unused +#define __maybe_unused __attribute__((unused)) #endif /* ----------------------- trace_seq ----------------------- */ -- cgit v1.1