From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by inbox.dpdk.org (Postfix) with ESMTP id 39528A0613 for ; Thu, 26 Sep 2019 09:56:36 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 088C91BEC0; Thu, 26 Sep 2019 09:56:36 +0200 (CEST) Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by dpdk.org (Postfix) with ESMTP id B667E1BE9C; Thu, 26 Sep 2019 09:56:33 +0200 (CEST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga101.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 26 Sep 2019 00:56:32 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.64,551,1559545200"; d="scan'208";a="219277532" Received: from fyigit-mobl.ger.corp.intel.com (HELO [10.237.221.10]) ([10.237.221.10]) by fmsmga002.fm.intel.com with ESMTP; 26 Sep 2019 00:56:31 -0700 To: Luca Boccassi , dev@dpdk.org Cc: stable@dpdk.org References: <20190729123216.64601-1-ferruh.yigit@intel.com> From: Ferruh Yigit Openpgp: preference=signencrypt Autocrypt: addr=ferruh.yigit@intel.com; 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charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Subject: Re: [dpdk-dev] [PATCH] igb_uio: fix build on Linux 5.3 for implicit fall through X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" On 9/24/2019 7:25 PM, Luca Boccassi wrote: > On Mon, 2019-07-29 at 13:32 +0100, Ferruh Yigit wrote: >> build error: >> .../dpdk/build/build/kernel/linux/igb_uio/igb_uio.c: >> In function ‘igbuio_pci_enable_interrupts’: >> .../dpdk/build/build/kernel/linux/igb_uio/igb_uio.c:230:6: >> error: this statement may fall through >> [-Werror=implicit-fallthrough=] >> 230 | if (pci_alloc_irq_vectors(udev->pdev, 1, 1, .... >> .../dpdk/build/build/kernel/linux/igb_uio/igb_uio.c:240:2: >> note: here >> 240 | case RTE_INTR_MODE_MSI: >> | ^~~~ >> >> The build error is caused by Linux kernel commit in 5.3 that enables >> the >> "-Wimplicit-fallthrough=3" gcc flag. >> Commit a035d552a93b ("Makefile: Globally enable fall-through >> warning") >> >> To fix the error, either a gcc attribute can be provided [1] or a >> code >> comment with some defined syntax need to be provided [2], since there >> is >> already comments, updated them slightly to match the required syntax >> to >> fix the build error. >> >> [1] >> "__attribute__ ((fallthrough));" >> >> [2] >> [ \t.!]*([Ee]lse,? |[Ii]ntentional(ly)? )? >> fall(s | |-)?thr(ough|u)[ \t.!]*(-[^\n\r]*)? >> >> Cc: >> stable@dpdk.org >> >> >> Signed-off-by: Ferruh Yigit < >> ferruh.yigit@intel.com >>> >> --- >> kernel/linux/igb_uio/igb_uio.c | 6 +++--- >> 1 file changed, 3 insertions(+), 3 deletions(-) > > Ferruh I'm including this in 17.11.7 since it fixes the build on a > number of new distros and it seems simple enough as it just updates the > comment for the compiler's benefit. > > Let me know if there are any objections. > +1 to include it, as you said it is simple, thanks.