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 X-Spam-Level: X-Spam-Status: No, score=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2F19CC33CAF for ; Thu, 16 Jan 2020 18:19:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0923C208C3 for ; Thu, 16 Jan 2020 18:19:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1579198740; bh=egfrRyEG4PVI4kEA7aq+1gPEUDIvHB0JAwYwISaADu8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=MInW7E2/3je8uoj3u5N8Vy9z/g60cbRN9FjjaJIiLpnKwMjtJ1SY3be0bY6J05Asr +pvNYiQTyDDeSFVdPSjIqD1dtEAQGKODJ7V5EQjus+P1AA1VRQtd8/Kf6HqnqWfQIV mbVB1oDM8wYzssni+FBgITQcnqkQCfG/hzs1uO2U= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2392621AbgAPR2k (ORCPT ); Thu, 16 Jan 2020 12:28:40 -0500 Received: from mail.kernel.org ([198.145.29.99]:39508 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387463AbgAPR20 (ORCPT ); Thu, 16 Jan 2020 12:28:26 -0500 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 86CD1246F4; Thu, 16 Jan 2020 17:28:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1579195705; bh=egfrRyEG4PVI4kEA7aq+1gPEUDIvHB0JAwYwISaADu8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=x4hR1h1pCHMK6alFA5G+P5OSDJVC5AXDloIwDxjVRXnsmLmmZRua6MVYVitv+PL/9 ZisDEGrY0dqJoMksENsXlwVTgUEsO1Lk6hMljzqVtMLYI5seyygagOGM/yOBetUWwx jpf9TXISm/ODmR53ogaeHpCq0h4BnOWRx4QAqtc4= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Arnd Bergmann , "David S . Miller" , Sasha Levin , netdev@vger.kernel.org, clang-built-linux@googlegroups.com Subject: [PATCH AUTOSEL 4.14 252/371] qed: reduce maximum stack frame size Date: Thu, 16 Jan 2020 12:22:04 -0500 Message-Id: <20200116172403.18149-195-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200116172403.18149-1-sashal@kernel.org> References: <20200116172403.18149-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Arnd Bergmann [ Upstream commit 7c116e02a4a7575c8c62bfd2106e3e3ec8fb99dc ] clang warns about an overly large stack frame in one function when it decides to inline all __qed_get_vport_*() functions into __qed_get_vport_stats(): drivers/net/ethernet/qlogic/qed/qed_l2.c:1889:13: error: stack frame size of 1128 bytes in function '_qed_get_vport_stats' [-Werror,-Wframe-larger-than=] Use a noinline_for_stack annotation to prevent clang from inlining these, which keeps the maximum stack usage at around half of that in the worst case, similar to what we get with gcc. Fixes: 86622ee75312 ("qed: Move statistics to L2 code") Signed-off-by: Arnd Bergmann Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/ethernet/qlogic/qed/qed_l2.c | 34 +++++++++++------------- 1 file changed, 15 insertions(+), 19 deletions(-) diff --git a/drivers/net/ethernet/qlogic/qed/qed_l2.c b/drivers/net/ethernet/qlogic/qed/qed_l2.c index 62cde3854a5c..5d7adedac68d 100644 --- a/drivers/net/ethernet/qlogic/qed/qed_l2.c +++ b/drivers/net/ethernet/qlogic/qed/qed_l2.c @@ -1629,10 +1629,9 @@ static void __qed_get_vport_pstats_addrlen(struct qed_hwfn *p_hwfn, } } -static void __qed_get_vport_pstats(struct qed_hwfn *p_hwfn, - struct qed_ptt *p_ptt, - struct qed_eth_stats *p_stats, - u16 statistics_bin) +static noinline_for_stack void +__qed_get_vport_pstats(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt, + struct qed_eth_stats *p_stats, u16 statistics_bin) { struct eth_pstorm_per_queue_stat pstats; u32 pstats_addr = 0, pstats_len = 0; @@ -1659,10 +1658,9 @@ static void __qed_get_vport_pstats(struct qed_hwfn *p_hwfn, HILO_64_REGPAIR(pstats.error_drop_pkts); } -static void __qed_get_vport_tstats(struct qed_hwfn *p_hwfn, - struct qed_ptt *p_ptt, - struct qed_eth_stats *p_stats, - u16 statistics_bin) +static noinline_for_stack void +__qed_get_vport_tstats(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt, + struct qed_eth_stats *p_stats, u16 statistics_bin) { struct tstorm_per_port_stat tstats; u32 tstats_addr, tstats_len; @@ -1705,10 +1703,9 @@ static void __qed_get_vport_ustats_addrlen(struct qed_hwfn *p_hwfn, } } -static void __qed_get_vport_ustats(struct qed_hwfn *p_hwfn, - struct qed_ptt *p_ptt, - struct qed_eth_stats *p_stats, - u16 statistics_bin) +static noinline_for_stack +void __qed_get_vport_ustats(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt, + struct qed_eth_stats *p_stats, u16 statistics_bin) { struct eth_ustorm_per_queue_stat ustats; u32 ustats_addr = 0, ustats_len = 0; @@ -1747,10 +1744,9 @@ static void __qed_get_vport_mstats_addrlen(struct qed_hwfn *p_hwfn, } } -static void __qed_get_vport_mstats(struct qed_hwfn *p_hwfn, - struct qed_ptt *p_ptt, - struct qed_eth_stats *p_stats, - u16 statistics_bin) +static noinline_for_stack void +__qed_get_vport_mstats(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt, + struct qed_eth_stats *p_stats, u16 statistics_bin) { struct eth_mstorm_per_queue_stat mstats; u32 mstats_addr = 0, mstats_len = 0; @@ -1776,9 +1772,9 @@ static void __qed_get_vport_mstats(struct qed_hwfn *p_hwfn, HILO_64_REGPAIR(mstats.tpa_coalesced_bytes); } -static void __qed_get_vport_port_stats(struct qed_hwfn *p_hwfn, - struct qed_ptt *p_ptt, - struct qed_eth_stats *p_stats) +static noinline_for_stack void +__qed_get_vport_port_stats(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt, + struct qed_eth_stats *p_stats) { struct qed_eth_stats_common *p_common = &p_stats->common; struct port_stats port_stats; -- 2.20.1