Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751667AbdCPH7h (ORCPT ); Thu, 16 Mar 2017 03:59:37 -0400 Received: from twosheds.infradead.org ([90.155.92.209]:40918 "EHLO twosheds.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751357AbdCPH7c (ORCPT ); Thu, 16 Mar 2017 03:59:32 -0400 Message-ID: <1489651152.4195.192.camel@infradead.org> Subject: Re: [PATCH 3/4] uapi glibc compat: Do not check for __USE_MISC From: David Woodhouse To: Hauke Mehrtens , davem@davemloft.net Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, jarod@redhat.com, jogo@openwrt.org, david.heidelberger@ixit.cz, maillist-linux@barfooze.de, mikko.rapeli@iki.fi In-Reply-To: <20170312220039.16885-4-hauke@hauke-m.de> References: <20170312220039.16885-1-hauke@hauke-m.de> <20170312220039.16885-4-hauke@hauke-m.de> Content-Type: multipart/signed; micalg="sha-256"; protocol="application/x-pkcs7-signature"; boundary="=-j1hRANviEaxUFx5vgxQg" Date: Thu, 16 Mar 2017 07:59:12 +0000 Mime-Version: 1.0 X-Mailer: Evolution 3.18.5.2-0ubuntu3.1 X-SRS-Rewrite: SMTP reverse-path rewritten from by twosheds.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 Content-Length: 7627 Lines: 113 --=-j1hRANviEaxUFx5vgxQg Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Sun, 2017-03-12 at 23:00 +0100, Hauke Mehrtens wrote: > __USE_MISC is glibc specific and not available in musl libc. Only do > this check when glibc is used. This fixes a problem with musl libc. > ... > -/* Coordinate with glibc net/if.h header. */ > -#if defined(_NET_IF_H) && defined(__USE_MISC) > +/* Coordinate with libc net/if.h header. */ > +#if defined(_NET_IF_H) && (!defined(__GLIBC__) || defined(__USE_MISC)) I *really* don't like building up a plethora of knowledge about specific libc implementations in the kernel. As a general rule, if we have *anything* that depends on __GLIBC__ then we are Doing It Wrong=E2=84= =A2. --=-j1hRANviEaxUFx5vgxQg Content-Type: application/x-pkcs7-signature; name="smime.p7s" Content-Disposition: attachment; filename="smime.p7s" Content-Transfer-Encoding: base64 MIAGCSqGSIb3DQEHAqCAMIACAQExDzANBglghkgBZQMEAgEFADCABgkqhkiG9w0BBwEAAKCCDzUw ggSvMIIDl6ADAgECAhEA4CPLFRKDU4mtYW56VGdrITANBgkqhkiG9w0BAQsFADBvMQswCQYDVQQG EwJTRTEUMBIGA1UEChMLQWRkVHJ1c3QgQUIxJjAkBgNVBAsTHUFkZFRydXN0IEV4dGVybmFsIFRU UCBOZXR3b3JrMSIwIAYDVQQDExlBZGRUcnVzdCBFeHRlcm5hbCBDQSBSb290MB4XDTE0MTIyMjAw MDAwMFoXDTIwMDUzMDEwNDgzOFowgZsxCzAJBgNVBAYTAkdCMRswGQYDVQQIExJHcmVhdGVyIE1h bmNoZXN0ZXIxEDAOBgNVBAcTB1NhbGZvcmQxGjAYBgNVBAoTEUNPTU9ETyBDQSBMaW1pdGVkMUEw PwYDVQQDEzhDT01PRE8gU0hBLTI1NiBDbGllbnQgQXV0aGVudGljYXRpb24gYW5kIFNlY3VyZSBF bWFpbCBDQTCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBAImxDdp6UxlOcFIdvFamBia3 uEngludRq/HwWhNJFaO0jBtgvHpRQqd5jKQi3xdhTpHVdiMKFNNKAn+2HQmAbqUEPdm6uxb+oYep 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