From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C2EC6CDB474 for ; Mon, 23 Oct 2023 11:47:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234414AbjJWLre (ORCPT ); Mon, 23 Oct 2023 07:47:34 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44136 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234451AbjJWLre (ORCPT ); Mon, 23 Oct 2023 07:47:34 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4DA97E8 for ; Mon, 23 Oct 2023 04:47:32 -0700 (PDT) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3597EC433C7; Mon, 23 Oct 2023 11:47:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1698061651; bh=JGigUwSdPXZaE2M6a7j+v0VyJkvTCSoLKu9vbA4K42w=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=lLEj56wBwWrzzWlNVOJxHBOq70pLRP4qxX4bm82C+zxMk7GL021QtF35XyM1N2jlj uaPSMrFJvebxrfXIH8cXhvSChnXU4xdql0fhMkM8s+C2oRuufutC3ZyVTppm4m8Zrm 7znGeJ/DlS8e43DyxSBWCZIom9mgfBl86whEDOJw= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Geert Uytterhoeven , Simon Horman , David Ahern , "David S. Miller" Subject: [PATCH 5.10 118/202] neighbor: tracing: Move pin6 inside CONFIG_IPV6=y section Date: Mon, 23 Oct 2023 12:57:05 +0200 Message-ID: <20231023104829.985458259@linuxfoundation.org> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20231023104826.569169691@linuxfoundation.org> References: <20231023104826.569169691@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org 5.10-stable review patch. If anyone has any objections, please let me know. ------------------ From: Geert Uytterhoeven commit 2915240eddba96b37de4c7e9a3d0ac6f9548454b upstream. When CONFIG_IPV6=n, and building with W=1: In file included from include/trace/define_trace.h:102, from include/trace/events/neigh.h:255, from net/core/net-traces.c:51: include/trace/events/neigh.h: In function ‘trace_event_raw_event_neigh_create’: include/trace/events/neigh.h:42:34: error: variable ‘pin6’ set but not used [-Werror=unused-but-set-variable] 42 | struct in6_addr *pin6; | ^~~~ include/trace/trace_events.h:402:11: note: in definition of macro ‘DECLARE_EVENT_CLASS’ 402 | { assign; } \ | ^~~~~~ include/trace/trace_events.h:44:30: note: in expansion of macro ‘PARAMS’ 44 | PARAMS(assign), \ | ^~~~~~ include/trace/events/neigh.h:23:1: note: in expansion of macro ‘TRACE_EVENT’ 23 | TRACE_EVENT(neigh_create, | ^~~~~~~~~~~ include/trace/events/neigh.h:41:9: note: in expansion of macro ‘TP_fast_assign’ 41 | TP_fast_assign( | ^~~~~~~~~~~~~~ In file included from include/trace/define_trace.h:103, from include/trace/events/neigh.h:255, from net/core/net-traces.c:51: include/trace/events/neigh.h: In function ‘perf_trace_neigh_create’: include/trace/events/neigh.h:42:34: error: variable ‘pin6’ set but not used [-Werror=unused-but-set-variable] 42 | struct in6_addr *pin6; | ^~~~ include/trace/perf.h:51:11: note: in definition of macro ‘DECLARE_EVENT_CLASS’ 51 | { assign; } \ | ^~~~~~ include/trace/trace_events.h:44:30: note: in expansion of macro ‘PARAMS’ 44 | PARAMS(assign), \ | ^~~~~~ include/trace/events/neigh.h:23:1: note: in expansion of macro ‘TRACE_EVENT’ 23 | TRACE_EVENT(neigh_create, | ^~~~~~~~~~~ include/trace/events/neigh.h:41:9: note: in expansion of macro ‘TP_fast_assign’ 41 | TP_fast_assign( | ^~~~~~~~~~~~~~ Indeed, the variable pin6 is declared and initialized unconditionally, while it is only used and needlessly re-initialized when support for IPv6 is enabled. Fix this by dropping the unused variable initialization, and moving the variable declaration inside the existing section protected by a check for CONFIG_IPV6. Fixes: fc651001d2c5ca4f ("neighbor: Add tracepoint to __neigh_create") Signed-off-by: Geert Uytterhoeven Reviewed-by: Simon Horman Tested-by: Simon Horman # build-tested Reviewed-by: David Ahern Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- include/trace/events/neigh.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/include/trace/events/neigh.h +++ b/include/trace/events/neigh.h @@ -39,7 +39,6 @@ TRACE_EVENT(neigh_create, ), TP_fast_assign( - struct in6_addr *pin6; __be32 *p32; __entry->family = tbl->family; @@ -47,7 +46,6 @@ TRACE_EVENT(neigh_create, __entry->entries = atomic_read(&tbl->gc_entries); __entry->created = n != NULL; __entry->gc_exempt = exempt_from_gc; - pin6 = (struct in6_addr *)__entry->primary_key6; p32 = (__be32 *)__entry->primary_key4; if (tbl->family == AF_INET) @@ -57,6 +55,8 @@ TRACE_EVENT(neigh_create, #if IS_ENABLED(CONFIG_IPV6) if (tbl->family == AF_INET6) { + struct in6_addr *pin6; + pin6 = (struct in6_addr *)__entry->primary_key6; *pin6 = *(struct in6_addr *)pkey; }