From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BF202DF40 for ; Mon, 15 May 2023 16:39:10 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D7B5EC433D2; Mon, 15 May 2023 16:39:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1684168750; bh=oEMH0GuCs9QAYViycUDZjVaQXdbcl4Ln81QzGh77Wi4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=qazKRCEpUPLQmBUwVUcvyM5DTLIoaHDnnzX9ezdq7ImsDoZ6WFgjgmGmMS9+CLJ9b WivVkCAcvfnm6aNL/XUIc5FSIxLm7uLOJXCmJAlC3O2fpi9W7C2ZUeQGcddx4HQJzF tiPN1RSPz8LqCsIkHnymG/Mv3qhK+wbf7f5g4fls= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Arnaldo Carvalho de Melo , Guenter Roeck Subject: [PATCH 4.19 009/191] perf sched: Cast PTHREAD_STACK_MIN to int as it may turn into sysconf(__SC_THREAD_STACK_MIN_VALUE) Date: Mon, 15 May 2023 18:24:06 +0200 Message-Id: <20230515161707.540646506@linuxfoundation.org> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230515161707.203549282@linuxfoundation.org> References: <20230515161707.203549282@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Arnaldo Carvalho de Melo commit d08c84e01afa7a7eee6badab25d5420fa847f783 upstream. In fedora rawhide the PTHREAD_STACK_MIN define may end up expanded to a sysconf() call, and that will return 'long int', breaking the build: 45 fedora:rawhide : FAIL gcc version 11.1.1 20210623 (Red Hat 11.1.1-6) (GCC) builtin-sched.c: In function 'create_tasks': /git/perf-5.14.0-rc1/tools/include/linux/kernel.h:43:24: error: comparison of distinct pointer types lacks a cast [-Werror] 43 | (void) (&_max1 == &_max2); \ | ^~ builtin-sched.c:673:34: note: in expansion of macro 'max' 673 | (size_t) max(16 * 1024, PTHREAD_STACK_MIN)); | ^~~ cc1: all warnings being treated as errors $ grep __sysconf /usr/include/*/*.h /usr/include/bits/pthread_stack_min-dynamic.h:extern long int __sysconf (int __name) __THROW; /usr/include/bits/pthread_stack_min-dynamic.h:# define PTHREAD_STACK_MIN __sysconf (__SC_THREAD_STACK_MIN_VALUE) /usr/include/bits/time.h:extern long int __sysconf (int); /usr/include/bits/time.h:# define CLK_TCK ((__clock_t) __sysconf (2)) /* 2 is _SC_CLK_TCK */ $ So cast it to int to cope with that. Signed-off-by: Arnaldo Carvalho de Melo Cc: Guenter Roeck Signed-off-by: Greg Kroah-Hartman --- tools/perf/builtin-sched.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/tools/perf/builtin-sched.c +++ b/tools/perf/builtin-sched.c @@ -659,7 +659,7 @@ static void create_tasks(struct perf_sch err = pthread_attr_init(&attr); BUG_ON(err); err = pthread_attr_setstacksize(&attr, - (size_t) max(16 * 1024, PTHREAD_STACK_MIN)); + (size_t) max(16 * 1024, (int)PTHREAD_STACK_MIN)); BUG_ON(err); err = pthread_mutex_lock(&sched->start_work_mutex); BUG_ON(err);