From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932869AbcDSPuy (ORCPT ); Tue, 19 Apr 2016 11:50:54 -0400 Received: from bombadil.infradead.org ([198.137.202.9]:54476 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932598AbcDSPuw (ORCPT ); Tue, 19 Apr 2016 11:50:52 -0400 From: Arnaldo Carvalho de Melo To: Ingo Molnar Cc: linux-kernel@vger.kernel.org, Arnaldo Carvalho de Melo , Adrian Hunter , David Ahern , Jiri Olsa , Milian Wolff , Namhyung Kim , Wang Nan Subject: [PATCH 01/14] perf trace: Fix build when DWARF unwind isn't available Date: Tue, 19 Apr 2016 12:50:28 -0300 Message-Id: <1461081041-10580-2-git-send-email-acme@kernel.org> X-Mailer: git-send-email 2.5.5 In-Reply-To: <1461081041-10580-1-git-send-email-acme@kernel.org> References: <1461081041-10580-1-git-send-email-acme@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Arnaldo Carvalho de Melo The variable is initialized and then conditionally set to a different value, but not used when DWARF unwinding is not available, bummer, write 1000 times: "Run make -C tools/perf build-test"... builtin-trace.c: In function ‘cmd_trace’: builtin-trace.c:3112:6: error: variable ‘max_stack_user_set’ set but not used [-Werror=unused-but-set-variable] bool max_stack_user_set = true; ^ cc1: all warnings being treated as err Fix it by marking it as __maybe_unused. Cc: Adrian Hunter Cc: David Ahern Cc: Jiri Olsa Cc: Milian Wolff Cc: Namhyung Kim Cc: Wang Nan Fixes: 056149932602 ("perf trace: Make --(min,max}-stack imply "--call-graph dwarf"") Link: http://lkml.kernel.org/n/tip-85r40c5hhv6jnmph77l1hgsr@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/builtin-trace.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c index 026ec0c749b0..0e3c1cecef1b 100644 --- a/tools/perf/builtin-trace.c +++ b/tools/perf/builtin-trace.c @@ -3109,7 +3109,7 @@ int cmd_trace(int argc, const char **argv, const char *prefix __maybe_unused) "per thread proc mmap processing timeout in ms"), OPT_END() }; - bool max_stack_user_set = true; + bool __maybe_unused max_stack_user_set = true; bool mmap_pages_user_set = true; const char * const trace_subcommands[] = { "record", NULL }; int err; -- 2.5.5